When engineering projects demand consistency, compatibility, and reliability, US standard fasteners are the go-to choice for buyers across North America, Europe, and beyond. Whether you are sourcing parts for automotive assembly, heavy machinery, or construction projects, the right fastener standard ensures your components fit perfectly every time - without costly rework or downtime.

At JLHY, we specialize in manufacturing US standard fasteners in China for international B2B buyers. Our production covers the full range of inch-based fasteners including hex bolts, machine screws, hex nuts, flat washers, lock washers, and more, which are all made to ANSI, ASTM, and ASME specifications. If you are looking for a US standard fasteners manufacturer you can trust, JLHY has the capability, quality system, and export experience to be that partner.

Bolts

Our hex bolt lineup covers everything from low-carbon structural bolts to high-strength grades for demanding applications. We supply ASME B18.2.1 hex bolts in fractional inch sizes from 1/4" through 2", available in grades such as Grade 2, Grade 5, and Grade 8. Heavy hex bolts, tap bolts, and frame bolts are also available for specialized uses.

Machine Screws

JLHY offers flat head, pan head, and button head machine screws to ASME B18.6.3 specifications. These screws are widely used in electrical enclosures, appliance assembly, and precision equipment. We produce UNC and UNF thread series across a broad size range.

Nuts

Our hex nut and lock nut offerings comply with ASME B18.2.2. We produce full hex nuts, jam nuts, hex flange nuts, and prevailing-torque lock nuts. Both UNC and UNF thread series are available, and we can match nut grades to your bolt specifications for proper load distribution.

Washers

Flat washers, split lock washers, and Belleville spring washers are produced to ASME B18.21.1 and B18.22M standards. These components play a critical role in distributing load, preventing loosening, and protecting surfaces — making them essential across virtually every application.

Specialty Fasteners

Beyond standard products, JLHY also produces socket head cap screws, shoulder bolts, set screws, threaded studs, and custom-configured fasteners to drawing. Our flexibility in small-to-medium batch runs makes us a practical choice for buyers who need both catalogue items and purpose-built parts.US Standards We Work With: UNC, UNF, ANSI, ASTM.

Manufacturing Capabilities at JLHY

JLHY operates modern production facilities equipped with cold forging, hot forging, and precision machining lines. The thread rolling, heat treatment, and surface coating capabilities mean we control quality from raw material to finished fastener.

We work with a wide range of materials including carbon steel (zinc plated, hot-dip galvanized, black oxide), alloy steel, stainless steel (302, 304, 316), brass, and aluminum. Custom material requests are handled through our technical sales team.

JLHY maintains a rigorous quality management system aligned with ISO 9001:2015. Every production batch undergoes dimensional verification, mechanical testing, and surface finish inspection. For critical applications, we also offer salt spray testing, torque testing, and fatigue testing.

Why B2B Buyers Choose JLHY as Their Fasteners Manufacturer in China

JLHY is a professional fastener manufacturer based in China, serving B2B buyers worldwide with US standard, metric, and specialty fasteners. We specialize in bolt, screw, nut, and washer products for automotive, industrial, construction, and marine applications. Our commitment to quality, competitive pricing, and responsive service has made us a trusted sourcing partner for companies across North America, Europe, and Southeast Asia.

JLHY has years of experience shipping fasteners internationally. We handle export documentation, fumigation (when required for wood packaging), and container loading optimization. Our logistics partners ensure your order arrives on time, whether you are importing a single pallet or a full container.

If you are evaluating US standard fasteners manufacturers in China, JLHY welcomes the opportunity to earn your business. Contact our team today and let us discuss how we can support your next project.