RAYCHIN LIMITED, we are materials experts who focus only on fasteners made from the highest performance specialty metals for the most challenging and extreme applications.

• Stainless Steel Series: Martensitic Stainless Steel, Ferritic Stainless Steel, Austenitic Stainless Steel, Austenitic-Ferritic (Duplex) Stainless Steel and Precipitation Hardening Stainless Steel.

• Super Alloys Series: Nickel-based Alloy, Cobalt-based Alloy, Iron-based Alloy, Molybdenum-based Alloy, ‌Titanium-based Alloy, Copper based Alloy, ‌Zirconium Alloy.

• Alloy Steel Series: Low Alloy Steel, Medium Alloy Steel, High Alloy Steel, Special Alloy Steel.

The Hex Differences

Hex Head Bolt

•  Appropriate for when mechanical properties are more important than dimensional tolerances.

•  Hex bolts have a flat end and lack the washer face under the head.

Hex Head Cap Screw

•  Precise applications where tight tolerances on the body dimensions are required.

•  Features flat washer facing under the bolt head.

•  Also called a finished hex bolt.

Premium Hex Bolts & Hex Cap Screws in High-Performance Alloys | RAYCHIN Custom Fastener Manufacturer

RAYCHIN manufactures precision hex bolts in 25+ special alloys like Inconel 718, Duplex 2205, Titanium Gr5, Hastelloy C276, and MP35N. Compliant with ASTM, ASME, DIN, UNS, and MIL standards. Custom OEM hex head bolts for aerospace, oil & gas, chemical, and marine applications. Request a quote.

High-Performance Hex Bolts for Critical Applications – Custom Manufactured in Over 25 Advanced Alloys

At RAYCHIN, we are a leading manufacturer specializing in the precision engineering of hex bolts, hex cap screws, and hex head bolts from an extensive portfolio of corrosion-resistant, high-strength, and high-temperature alloys. We serve global OEMs in industries where material failure is not an option.

Our expertise lies in transforming these specialized materials into reliable fasteners that meet the stringent demands of ASTM, ASME, DIN, UNS, EN, and MIL standards. Below is a detailed overview of our material capabilities and their standardized specifications.

Comprehensive Material Grades & Standard Specifications for Our Hex Bolts

We expertly machine and forge hex bolts from the following alloy families, each with distinct grades and international classifications:

1. Precipitation-Hardening Stainless Steels:

• 17-4 PH (ASTM A564 Type 630, UNS S17400, AMS 5643): Offers high strength (H900, H1025, H1150 conditions) and good corrosion resistance.

• PH 13-8 Mo (ASTM A564 Type 625, UNS S13800, AMS 5629): Provides superior strength, toughness, and stress corrosion cracking resistance.

2. Nickel-Based Superalloys (High-Temperature & Corrosion-Resistant):

• Inconel® Alloys: Includes Inconel 600 (UNS N06600), Inconel 625 (UNS N06625, AMS 5666), and Inconel 718 (UNS N07718, AMS 5663) for extreme heat and oxidation resistance.

• Monel® Alloys: Monel 400 (UNS N04400) and the age-hardenable Monel K500 (UNS N05500) for exceptional corrosion resistance in seawater and chemical environments.

• Hastelloy® Alloys: Such as Hastelloy C276 (UNS N10276, ASTM B574), C22 (UNS N06022), and B2 (UNS N10665) for severe corrosive and oxidizing conditions.

• Incoloy® Alloys: Incoloy 825 (UNS N08825) and Incoloy 925 (UNS N09925) for resistance to both oxidation and aqueous corrosion.

• Waspaloy (UNS N07001, AMS 5708): A high-strength alloy for demanding aerospace turbine applications.

• Nimonic® Alloys (e.g., Nimonic 80A, 90): British-standard (BS) alloys renowned for high-temperature creep resistance.

3. Duplex & Super Duplex Stainless Steels:

• Duplex Steel: Common grades include Duplex 2205 (UNS S32205/S31803, ASTM A182), known for high strength and chloride resistance.

• Super Duplex & 6Mo Alloys: Alloy 926 (UNS N08926) and AL-6XN® (UNS N08367) offer the highest pitting and crevice corrosion resistance (PREN >40).

4. Titanium Alloys:

• Commercially Pure Titanium: Grade 2 (UNS R50400, ASTM B348).

• Aerospace-Grade Titanium: Grade 5, Ti-6Al-4V (UNS R56400, AMS 4928), the workhorse for high strength-to-weight ratio applications.

5. Refractory & Exotic Metals:

• Tantalum (UNS R05200, ASTM B365): For ultimate corrosion resistance, especially in acidic media.

• Zirconium 702 (UNS R60702, ASTM B550): Excellent in aggressive reducing acids like sulfuric and hydrochloric.

• Molybdenum (UNS R03600) & Tungsten: For extreme high-temperature and specialized wear applications.

6. Specialty Austenitic Stainless Steels & Nickel Alloys:

• Nitronic® Alloys: Nitronic 50 (XM-19, UNS S20910) and Nitronic 60 (UNS S21800) for high strength and wear resistance.

• High-Performance Stainless: 254 SMO (UNS S31254), 310 Stainless Steel (UNS S31000), Alloy 20 (Carpenter 20, UNS N08020), and Alloy 330 (UNS N08330) for various heat and corrosion challenges.

• High-Strength, Non-Magnetic Cobalt Alloys: MP35N (UNS R30035, AMS 5844) and MP159 (AMS 5846) for unparalleled strength and toughness.

7. High-Strength Aluminum:

• Aluminum 7075 (UNS A97075, ASTM B211, AMS QQ-A-225/9): Typically in T6 temper for maximum strength.

8. Pure Nickel & Iron-Based Superalloy:

• Nickel 200 / 201 (UNS N02200 / N02201, ASTM B160): For excellent corrosion resistance and high conductivity.

• A286 (UNS S66286, AMS 5731): An iron-based superalloy with high strength at elevated temperatures.

Custom Hex Bolt Manufacturing to Your Exact Specifications

RAYCHIN is your expert partner for custom OEM fasteners. We manufacture special hex bolts directly from your CAD drawings and specifications, ensuring compliance with your required international standards.

• Full Customization: Non-standard diameters, lengths, thread series (UN, Metric, Whitworth), head configurations, and special features (undercuts, drilled heads, shoulders).

• Complete Processing: Capabilities include hot and cold forging, CNC precision machining, thread rolling for superior fatigue life, and certified heat treatment.

• Quality & Traceability: We provide full Material Test Reports (MTRs) to EN 10204 3.1, and our processes support AS9100, NADCAP, and PED requirements.

Industries Served

Our hex bolts are critical components in:

• Aerospace & Defense (AS9100): Engine fasteners, airframe structures.

• Oil & Gas (NACE MR0175/ISO 15156): Subsea equipment, downhole tools, refinery systems.

• Chemical & Pharmaceutical Processing: Reactors, pumps, valves in corrosive service.

• Marine & Offshore: Shipbuilding, seawater cooling systems, offshore platforms.

• Power Generation: Nuclear, thermal, and renewable energy systems.

Why Partner with RAYCHIN?

• Unmatched Material Expertise: In-depth knowledge of over 25 advanced alloy systems.

• Global Standards Compliance: Products meet ASTM, DIN, ASME, and MIL specifications for worldwide acceptance.

• End-to-End Solution: From material selection and prototyping to full-scale production and certification.

• Global Supply: Reliable fastener supplier to industries across North America, Europe, and Asia.

Ready to Source Premium Hex Bolts?
Contact RAYCHIN today for a technical consultation and quotation. Email your drawings to our engineering team for a prompt review.

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