Precision Bolts
Bolts with controlled thread quality, head geometry and dimensional accuracy for critical applications.
FASTENERS
Precision Threaded Fasteners
Precision Threaded Fasteners for Fit-Critical Applications
Custom precision threaded fasteners manufactured to your drawings. Built for thread accuracy, fit control, torque reliability and repeat production.
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OVERVIEW
Tight tolerance. Fit-critical. Made to drawing.
M2-M24Typical thread size
Class 6g/6HTypical thread tolerance
VariousThread standards
VariousMaterial options
Parts We Manufacture
Each part is made to customer drawings, not from a standard catalog.
Precision Nuts
Nuts with controlled thread tolerance, face flatness and height for fit-critical assemblies.
Threaded Inserts
Threaded inserts for embedding in softer materials or providing replaceable thread interfaces.
Coupling Nuts
Extended nuts for connecting two threaded rods or studs end-to-end.
Threaded Plugs
Threaded plugs and caps for sealing ports, access holes and fittings.
Custom Threaded Fasteners
Non-standard threaded fasteners with special geometry, thread or features.
Applications
Our products serve industries that demand precision, reliability and repeat production.
Industrial Equipment
Critical bolting, flange assemblies and pressure-containing joints
Automotive
Engine, brake and safety-critical fastening
Oil & Gas
Flange bolting and pressure-rated threaded fasteners
Electronics
Precision threaded hardware for enclosures and assemblies
Medical & Instruments
Instrument fasteners and precision assembly hardware
Materials & Surface Finishes
Material selection is driven by application requirements, environment and performance needs.
Materials
Stainless Steel304 / 316 / 17-4 PH / A2-70 / A4-80
Alloy Steel4140 / 4340 / 8.8 / 10.9 / 12.9 grade
Carbon Steel1045 / 12L14
BrassC3604
TitaniumGrade 5
Aluminum6061 / 7075
Surface Finishes
- Heat Treatment & Hardening
- Electroplating — zinc / nickel / chrome / cadmium
- Black Oxide
- Passivation
- Mechanical Polishing
- Thread Locking Patch
- Phosphate Coating
- Hot-Dip Galvanizing
Available to drawing requirements through in-house and qualified partner processes.
Not sure which material or finish fits your application?
Talk to an EngineerManufacturing Capability
Our equipment is optimized for the requirements of this product family.
- Thread Size
- M2-M24 / UNC / UNF / BSW
- Thread Tolerance
- Class 6g / 6H or to drawing
- Manufacturing
- CNC turning / Thread rolling / Tapping
- Thread Standards
- Metric / UNC / UNF / BSW / Custom
- Production Volume
- Prototype to mass production
- Secondary Operations
- Milling / Slotting / Cross-drilling
- Heat Treatment
- Case hardening / Through hardening
- Inspection
- Thread gauging & dimensional check
* Final values are confirmed against the drawing, material, geometry and inspection plan during RFQ review.
View CapabilitiesWhy Buyers Choose Zhuocheng
Experience with tight-tolerance threads, fit-critical geometries and thread gauging.
Wide range of materials and heat treatments for specific strength and corrosion requirements.
Drawings reviewed for thread feasibility, tolerance, material and manufacturing method.
Support sample validation, pilot batches and long-term production programs.
Quality & Inspection Process
IncomingMaterial & certificate check
First ArticleThread & dimensional verification
In-ProcessThread & tolerance control
FinalThread gauging & inspection
Typical Features
Representative parts from our production.
Precision Bolt
Precision Nut
Threaded Insert
Coupling Nut
Threaded Plug
Custom Fastener
Hex Bolt
Flange Bolt
Frequently Asked Questions
Can you achieve class 6g/6H thread tolerance?
Yes. We routinely achieve class 6g (external) and 6H (internal) thread tolerances. Tighter tolerances may be possible depending on size and material.
Can you provide thread inspection certificates?
Yes. Thread gauging reports and dimensional inspection records can be provided per project requirements.
Can you produce threaded fasteners from 12.9 grade alloy steel?
Yes. We can produce fasteners from 12.9 grade alloy steel with appropriate heat treatment to achieve the required mechanical properties.
Can you provide special coatings?
Yes. We offer zinc plating, nickel plating, chrome plating, black oxide, phosphate coating, hot-dip galvanizing and other coatings per drawing.
NEXT STEPHave a Precision Threaded Fastener Drawing?
Send us your drawing with thread specification, tolerance, material, coating and quantity. Our engineering team will review and recommend the appropriate manufacturing process.