Metal Nut Bolt For Instrument

Metal Nut Bolt Products for Instrument

Core fastener components engineered specifically for instrumentation devices — featuring high dimensional precision, corrosion resistance and reliable mechanical performance.

Metal Bolt Pins and Shafts for Instrument Measurement Devices

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Precision Metal Rivets for Instrument Enclosures

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Custom Metal Nuts and Bolts for Miniature Instrument Circuits

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About Us

ABOUT US

Zhejiang Jifeilong Instrument Technology Co., LTD.
(formerly Yueqing Feilong Instrument Factory)

was established in September 1999 and is located at the Oujiang Port of Wenzhou City. It has complete production, processing, grinding and other departments as well as other departments. It mainly engages in the integrated manufacturing and sales of various electrical switches, shafts, plastic products and hardware components. The products are widely used in home appliances, solenoid valves, electronics, automobiles, filtration equipment and other fields.

422

The company was established in

4+

Industry experience

210w

Registered capital

208+

Cooperative client

Metal Nut Bolt For Instrument — In-Depth Industry Insights

An authoritative overview of the commercial landscape, evolving trends and deep-dive application scenarios for precision metal fasteners in instrumentation.

🔩What Are Metal Nut Bolts for Instrument?

Metal nut bolts for instrument applications represent a specialized category of precision fasteners designed to meet the demanding dimensional tolerances, material purity and surface-finish requirements of instrumentation devices. Unlike standard construction fasteners, these components are manufactured from selected grades of stainless steel, brass, aluminum alloy, copper, and specialty non-magnetic alloys to fulfill the unique mechanical, electrical and environmental requirements found inside measurement instruments, laboratory analyzers, process-control transmitters and test equipment.

Key attributes that distinguish instrument-grade metal nuts and bolts include micro-tolerance thread profiles (ISO metric 4h/6H or ANSI/ASME B1 class 3A/3B), low magnetic permeability for sensitive electromagnetic environments, corrosion-resistant plating (nickel, gold or PTFE), and burr-free finishes that prevent contamination of high-impedance circuits. These fasteners secure critical subassemblies including sensor housings, PCB standoffs, calibration mechanism brackets, display panels, terminal blocks and transducer bodies.

⚡ Key Insight: In precision instrumentation, even a single poorly-toleranced fastener can introduce mechanical micro-vibrations or stray electromagnetic coupling that skews measurement readings by several percentage points — making the quality of metal nut bolts a direct determinant of instrument accuracy and long-term reliability.

📊Commercial & Industrial Market Landscape

The global market for precision fasteners used in instrumentation and control equipment has experienced robust growth over the past decade. Driven by surging demand for industrial automation, smart manufacturing (Industry 4.0), medical-grade analytical instruments and advanced energy metering systems, the addressable market for instrument-grade metal nuts and bolts is projected to exceed USD 3.8 billion by 2028, expanding at a CAGR of approximately 5.6%.

China remains the dominant manufacturing hub, with clusters concentrated in Zhejiang, Guangdong and Jiangsu provinces. Wenzhou in Zhejiang — home to Jifeilong — has long been recognized as a center of excellence for precision electrical hardware, benefiting from deep supply-chain integration, skilled machining labor and proximity to major low-voltage electrical OEMs. Chinese manufacturers have progressively moved up the value chain, competing not only on cost but on ISO 9001-certified quality management, RoHS compliance and traceable material certification demanded by European and North American instrument buyers.

Key end-user industries driving commercial demand include:

Process & industrial instrumentation — pressure transmitters, flow meters, temperature sensors, level gauges
Electrical test & measurement — multimeters, oscilloscopes, power analyzers, calibrators
Medical diagnostics — laboratory analyzers, patient monitoring systems, imaging equipment
Energy & utilities — smart electricity meters, gas analyzers, environmental monitoring stations
Aerospace & defense — avionics instruments, navigation systems, military-grade test rigs
Automotive electronics — ECU assemblies, on-board diagnostics, ADAS sensor housings

🚀Development Trends in Metal Fasteners for Instrumentation

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Non-Magnetic & Low-EMI Alloys

Instrumentation operating near MRI machines, Hall-effect sensors or RF-sensitive circuits increasingly specifies non-magnetic stainless steel (A4/316L) or titanium fasteners to eliminate stray field interference. Next-generation non-magnetic alloys with enhanced tensile strength are entering production at leading Zhejiang suppliers.

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Micro & Miniature Fastener Innovation

The miniaturization of portable analytical instruments and wearable industrial sensors is driving demand for M1.2–M2.5 metric micro-bolts with sub-0.01 mm pitch tolerances. Cold-forging and CNC Swiss-turn machining centers are enabling mass production at previously impossible accuracy levels.

♻️

Sustainable & Green Manufacturing

RoHS, REACH and WEEE compliance has become a baseline requirement. Cadmium-free platings, water-based lubricants and closed-loop grinding coolant recovery are now standard at tier-1 suppliers, supporting the sustainability goals of major instrument OEMs in Europe and North America.

🤖

Automated Quality Inspection with AI Vision

Leading fastener manufacturers are deploying AI-powered machine-vision systems capable of inspecting 100% of output for thread-form defects, dimensional variation and surface flaws at line speeds exceeding 400 pieces per minute — replacing traditional sampling-based QC with full inline verification.

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Digital Twin & Traceability Integration

OEMs in aerospace and medical instrument sectors now demand batch-level material traceability with digital certificates. Fastener manufacturers are implementing QR-code laser marking and ERP-integrated material tracing to provide full lifecycle documentation from raw-bar melt through finished-part shipment.

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High-Conductivity Copper & Brass Fasteners

With the proliferation of smart meters and energy-harvesting instrument nodes, demand for ultra-low-resistance brass terminal bolts (conductivity ≥ 25% IACS) with precision-formed contact surfaces is growing rapidly, replacing conventional steel hardware in current-carrying instrument assemblies.

🎯Deep-Dive Application Scenarios: Metal Nut Bolt in Instrumentation

1. Moving-Iron Analog Measurement Instruments

In classical moving-iron meters — used for AC current and voltage panel display — the iron-core pivot is secured by precision micro-bolts that must maintain zero-play bearing alignment across thousands of deflection cycles. The fasteners must be non-magnetic to avoid altering the instrument's magnetic circuit, and they must resist the continuous micro-vibrations inherent in panel-mounted switchboard instruments. Jifeilong's precision shaft and pin components serve as ideal structural elements in these assemblies, with dimensional tolerances meeting DIN 7168 fine grade specifications.

2. Process Transmitter Housings

Industrial pressure and temperature transmitters deployed in petrochemical plants, water treatment facilities and pharmaceutical manufacturing lines require stainless-steel bolts and nuts that withstand IP67/IP68 ingress ratings while remaining removable for periodic calibration. The thread engagement length and clamp load must be precisely controlled to achieve consistent gasket compression for the hermetic seal without yielding the sensor housing. Metal nut bolt sets with controlled torque-tension characteristics are specified for these applications, often featuring anti-galling PTFE-impregnated thread coatings.

3. Calibration Mechanism Brackets & Rotary Selectors

Square shafts and precision-ground pins used in rotary switch assemblies, multirange selector mechanisms and zero-adjustment cams within instrumentation devices demand fastener systems that provide zero angular backlash under thermal cycling. Brass or stainless-steel set screws with hardened-point tips are used to lock calibration shaft positions, while nylon-insert locking nuts prevent self-loosening due to instrument vibration during transportation and operation.

4. Terminal Block & Signal Connection Systems

Terminal posts and clamping bolts within instrument terminal blocks must maintain contact resistance below 5 mΩ throughout the rated lifecycle. Gold-flashed or silver-plated brass bolts with captive washers are commonly specified to ensure consistent clamping torque and stable resistance at millivolt-level signal connections. In high-impedance measurement circuits for pH, conductivity and dissolved-oxygen analyzers, any variation in terminal contact resistance directly corrupts measured values, making fastener quality a first-order instrument performance parameter.

5. Environmental Testing & Laboratory Equipment

Climate chambers, vibration test rigs and spectroscopy instruments require fastener systems that remain dimensionally stable across temperatures from −70 °C to +200 °C. Austenitic stainless-steel (316L) bolts with closely matched thermal expansion to aluminum instrument frames prevent joint loosening due to differential thermal growth. In atomic absorption spectrometers and HPLC systems, titanium fasteners are increasingly used where both corrosion resistance and non-magnetic properties are simultaneously required.

6. New Energy & Smart Grid Instrumentation

EV charging pile connector assemblies, smart energy meters and grid-monitoring relay protection devices all incorporate copper and brass bolt sets to handle sustained high-current connections reliably. Jifeilong's copper cylindrical head components and precision connector pins are purpose-built for new energy vehicle charging infrastructure, combining high conductivity with the robust mechanical engagement required for high-cycle plug/unplug operations.

Product Center

Mainly engaged in the integrated manufacturing and sales of various electrical switches, shafts, plastic products and hardware components

Low-voltage electrical - Core, shaft

Solenoid valve - Core

New energy - Pins

Medium and high voltage electrical - levers, brackets

Zero firmware - nozzle

Pins and shafts for molded case circuit breakers

Aluminum blind rivets for molded case circuit breakers

Molded case circuit breaker rivets

Custom Rivets for Miniature Circuit Breakers

Miniature circuit breaker rivets

Rivets for miniature circuit breaker parts

010203

Water valve accessories valve core iron core

Copper cylindrical head parts for new energy vehicle charging piles

New energy vehicle charging pile component connector

Water valve series components nozzle

APPLICATIONS Field

It is widely used in fields such as home appliances, solenoid valves, electronics, automobiles, and filtration equipment

Low-voltage Electrical Equipment

Moving iron cores, square shafts, and terminal posts are fundamental in circuit breakers for power distribution.

Instrument

Critical components ensuring precise measurement, reliable signal transmission and robust mechanical operation.

Household Appliances

Iron cores and bushings serve critical roles in electromagnetic conduction and mechanical support.

Solenoid Valves

Iron cores and bushings ensuring efficient electromagnetic actuation and long-term reliability.

Electronics

Vital roles in energy conversion, signal processing and mechanical stability in electronic devices.

Automobile

Moving iron cores, square shafts and terminal posts critical in modern automotive electrical systems.

Filtration Equipment

Enabling automated process control, precise mechanical positioning and uninterrupted electrical signaling.

Low-voltage electrical equipment

The Role of Moving Iron Cores, Square Shafts, and Terminal Posts in Circuit Breakers Moving iron cores, square shafts, and terminal posts are fundamental components in circuit breakers, ensuring reliable operation, precise mechanical control, and secure electrical connections in power distribution systems. The moving iron core serves as the key actuating element in magnetic trip units and solenoid-operated breakers. When excessive current flows through the coil, the core moves rapidly to trigger the trip mechanism, providing instantaneous protection against short circuits. Its high-permeability material ensures sensitive response to fault currents while withstanding repeated mechanical stresses during operation. Square shafts provide precise torque transmission in manual operating mechanisms and interlock systems. Their anti-rotation design guarantees accurate angular positioning of contacts during opening/closing operations, while robust construction maintains structural integrity under high mechanical stress. In modular breaker designs, square shafts enable synchronized operation of multiple poles for consistent performance. Terminal posts establish critical power connections between the breaker and electrical conductors. Featuring high-conductivity materials with corrosion-resistant plating, they ensure low-contact resistance and reliable current carrying capacity. Their clamping design maintains secure connections despite vibration or thermal cycling, preventing dangerous overheating in high-current applications.

Instrument

The Role of Moving Iron Cores, Square Shafts, and Terminal Posts in Instrumentation Devices Moving iron cores, square shafts, and terminal posts serve as critical components in various instrumentation devices, ensuring precise measurement, reliable signal transmission, and robust mechanical operation in industrial and laboratory applications. The moving iron core forms the essential sensing element in many analog instruments, particularly in moving-iron meters for current and voltage measurement. When exposed to magnetic fields generated by measured currents, the iron core moves proportionally to provide accurate deflection readings. Its ferromagnetic properties enable sensitive response to both AC and DC signals while maintaining stability across wide temperature ranges. In more advanced instruments, the core's position is precisely detected to provide digital readouts through transducer systems. Square shafts play a dual role in instrumentation, serving both as torque-transmitting elements in adjustment mechanisms and as precise positioning components in rotary switches and selectors. Their geometric design ensures positive engagement with control knobs and calibration tools, allowing technicians to make accurate adjustments without slippage. In environmental testing equipment, square shafts maintain alignment of moving parts even under continuous vibration or thermal expansion conditions. Terminal posts provide secure connection points in measurement circuits, designed to maintain signal integrity while facilitating easy installation. Gold-plated or corrosion-resistant terminals in precision instruments minimize contact resistance that could affect measurement accuracy. Their insulated designs prevent leakage currents in high-impedance circuits, while robust clamping mechanisms ensure stable connections for field instruments subjected to mechanical stress.

Household appliances

The Role of Iron Cores and Bushings in Household Appliances Iron cores and bushings are essential functional components in household appliances, serving critical roles in electromagnetic conduction, mechanical support, and noise reduction. Iron cores, typically made of laminated silicon steel, are widely used in transformers, motors, and solenoids. Their high magnetic permeability ensures efficient electromagnetic energy conversion while minimizing eddy current losses and heat generation. For example, in microwave oven transformers or compressor motors in air conditioners, iron cores enhance energy efficiency by optimizing magnetic flux transfer, contributing to overall appliance performance. Bushings, often constructed from metal or engineered plastics, act as supportive sleeves in rotating or sliding mechanisms, such as bearings and shafts. They reduce friction, absorb vibrations, and prevent wear between moving parts. In washing machines, nylon bushings are commonly used in drum shafts to dampen noise and extend operational lifespan. Additionally, bushings help maintain precise alignment, ensuring smooth and stable appliance operation.

Solenoid Valves

The Role of Iron Cores and Bushings in Solenoid Valves Iron cores and bushings are critical components in solenoid valves, ensuring efficient electromagnetic actuation, precise mechanical movement, and long-term reliability. The iron core (or plunger) is typically made of soft magnetic materials like laminated steel or ferrite, which concentrate magnetic flux when the solenoid coil is energized. This creates a strong electromagnetic force to pull or push the valve mechanism, enabling rapid and precise fluid flow control. In direct-acting valves, the iron core directly moves the sealing element, while in pilot-operated valves, it controls pressure differentials to actuate the main valve. The core's material and design minimize hysteresis and eddy current losses, improving response time and energy efficiency. Bushings, often made of brass, stainless steel, or wear-resistant polymers, guide the iron core's linear motion while reducing friction and wear. They ensure smooth operation, prevent metal-to-metal contact, and maintain alignment under repetitive cycling. In high-pressure or corrosive environments, bushings also act as protective sleeves, extending the valve's service life.

Electronics

The Role of Iron Cores and Bushings in Electronics Iron cores and bushings play vital roles in electronic devices, contributing to efficient energy conversion, signal processing, and mechanical stability. Iron cores, commonly made of laminated silicon steel, ferrite, or powdered iron, are essential in inductive components like transformers, inductors, and chokes. Their high magnetic permeability concentrates magnetic flux, enabling efficient energy transfer in power supplies and voltage regulation circuits. In high-frequency applications, ferrite cores minimize eddy current losses, ensuring stable performance in switch-mode power supplies (SMPS), RF filters, and electromagnetic interference (EMI) suppression devices. Bushings, typically fabricated from insulating materials like ceramics, plastics, or composites, provide structural support and electrical isolation in electronic assemblies. They serve as mounting sleeves for connectors, terminals, or high-voltage components, preventing short circuits and mechanical stress. In high-power electronics, bushings also act as thermal barriers, dissipating heat while maintaining dielectric strength.

Automobile

The Role of Moving Iron Cores, Square Shafts, and Terminal Posts in Automotive Systems Moving iron cores, square shafts, and terminal posts are critical components in modern automotive electrical and electromechanical systems, ensuring precise control, efficient energy transfer, and reliable connectivity. The moving iron core, typically found in solenoids, relays, and fuel injectors, serves as the key actuating element. When energized by a coil, it generates linear motion to control fluid flow (e.g., in automatic transmission valves) or switch high-current circuits (e.g., starter relays). Its rapid response and durability are vital for engine management and transmission systems. Square shafts provide torque transmission in applications like throttle bodies, idle air control valves, and wiper mechanisms. Their anti-rotation design ensures precise angular positioning, while robust materials withstand vibration and wear in harsh underhood environments. Terminal posts enable secure electrical connections in battery systems, alternators, and control modules. Designed for high conductivity and corrosion resistance, they ensure reliable power distribution even under extreme temperature fluctuations.

Filtration equipment

The Role of Moving Iron Cores, Square Shafts and Terminal Posts in Filtration Equipment Moving iron cores, square shafts and terminal posts play vital roles in modern filtration systems, ensuring precise control, reliable mechanical operation and secure electrical connectivity in both industrial and commercial applications. The moving iron core, typically found in solenoid valves controlling filtration processes, actuates to regulate fluid flow during backwashing cycles or media replacement. Its rapid electromagnetic response enables automatic switching between filtration and cleaning modes in self-cleaning systems. The core's durable construction withstands constant exposure to process fluids while maintaining precise movement for accurate flow control. Square shafts provide torque transmission in rotary filtration systems and valve actuators. Their non-slip design ensures positive engagement with filter head mechanisms during rotation, enabling precise positioning for multi-port valves in sand filters or membrane systems. Terminal posts establish critical electrical connections in automated filtration controls, linking sensors, controllers and solenoid valves. Their corrosion-resistant materials maintain conductivity despite moisture exposure, while secure clamping prevents loosening from system vibrations.

WHY CHOOSE US

OUR ADVANTAGE

For every production link, from raw material procurement to finished product shipment, strict quality control is implemented to guarantee each metal nut bolt for instrument meets the highest precision standards.

Quick Response

24-Hour Online
Fast Delivery

Fast shipping within three to five days
Factory Supply

Fast and Efficient
Free Samples

Provide Free Samples
Professional Design

We Have Professional Teams
Support Customization

OEM/ODM is available

Latest Updates

NEWS INFORMATION

The hard work in the past has brought about the current glorious career!

May-22-2025

What should be noted when processing hardware parts?

Before the machinery starts working, check whether the moving parts have been lubricated with oil. Then start it and check if the clutch and brake are functioning properly. Let the machine tool run idle for 1 to 3 minutes. Do not operate the machinery if it malfunctions.

May-22-2025

On which machines is the processing of hardware parts more widely applied?

The processing of hardware parts is becoming increasingly common. It can be widely applied in many machinery and processing factories, such as cranes, forklifts, hoists, and even in daily life, such as gold locks, keys, and parts for locomotive maintenance.

May-22-2025

What should be noted when purchasing hardware accessories?

The quality of hardware accessories: Nowadays, there are a large number of hardware accessories on the market, with varying qualities. When making a purchase, it is best to choose an established brand. Also, pay attention to whether their surfaces are smooth, if there is any rust, or if there is any damage, etc.

May-22-2025

What raw materials are used in the processing of hardware parts

Hardware parts processing is to process raw materials (stainless steel, copper, aluminum, iron.....) We use lathes, milling machines, drilling machines, grinding machines, polishing machines and other machinery to process various parts according to customers' drawings or samples.

OUR PARTNERS

With strict management, high-quality products and excellent services, it has won the trust and support of more than 100 enterprise customers in China.