Lock Nuts in Special Alloys | Nylon Insert, All-Metal & Prevailing Torque Lock Nuts | RAYCHIN

RAYCHIN manufactures vibration-resistant lock nuts in 25+ alloys: Nyloc nuts, all-metal lock nuts, flange lock nuts in Inconel, Hastelloy, Titanium, MP35N & more. DIN, ISO, ASME, MIL-SPEC compliant. Custom OEM lock nuts for aerospace, defense, automotive.

High-Performance Lock Nuts for Vibration-Prone & Critical Applications

RAYCHIN is an expert manufacturer of lock nuts, specialized fasteners engineered to prevent loosening under vibration, dynamic loads, and thermal cycling. In critical applications across aerospace, defense, automotive racing, and heavy machinery, a standard nut is a point of failure. Our lock nuts provide reliable, reusable, and maintenance-free locking security, manufactured from over 25 advanced alloys to perform in the most demanding environments.

We offer a complete range of locking technologies—from nylon insert lock nuts to high-temperature all-metal designs—all available with full material certification and compliance with DIN, ISO, ASME, MIL-SPEC, and NAS standards. Custom solutions from your drawings are our specialty.

Lock Nut Types & Locking Technologies

1. Nylon Insert Lock Nuts (Prevailing Torque):

• Nyloc Nuts (DIN 985, ISO 7040): Feature a nylon (polyamide) collar that creates friction against the bolt thread. Excellent for general vibration resistance. Not for extreme temperatures.

• High-Temperature Polymer Insert Nuts: Utilize advanced engineering plastics (e.g., PEEK, Vespel) for applications exceeding standard nylon limits.

2. All-Metal Lock Nuts (Prevailing Torque):

• Top-Lock/Prevailing Torque Nuts (DIN 980, ISO 7719): Have a non-circular, elliptical top section that deflects to create a locking force. Reusable and temperature-resistant.

• Center-Lock Nuts: Feature a deformed thread section in the nut's center.

• Stake Nuts (MIL-N-25027): Have threads mechanically staked at the top to create interference.

• Two-Way Lock Nuts: Can be installed from either end.

3. Free-Spinning Lock Nuts (Bearing Surface Locking):

• Flange Lock Nuts (DIN 1665, ISO 4161): Integrate a serrated flange that bites into the mating surface.

• Serrated Face Nuts (ASTM A194 Gr. 8S): Feature serrations on the bearing surface for locking.

• Washer-Assembled Nuts (e.g., Nord-Lock washers): Combine a standard nut with a pre-assembled locking washer system.

4. Special Application Lock Nuts:

• Castle Nuts & Slotted Nuts (DIN 935, ISO 7035): Used with a cotter pin for positive mechanical locking.

• Aerospace Self-Locking Nuts (NASM 25027, MS 21042): Meet stringent aerospace performance criteria.

• Custom Lock Nuts: Engineered to your OEM specifications with unique locking features, dimensions, or material combinations.

Full Material Portfolio with International Standards

We manufacture lock nuts in the following specialty materials, ensuring the right combination of locking performance and environmental resistance.

• Precipitation-Hardening Stainless Steels:

  • 17-4 PH (UNS S17400): ASTM A564 Gr. 630, AMS 5643, DIN 1.4542 (H900, H1025, H1150).

  • PH 13-8 Mo (UNS S13800): ASTM A564 Gr. 625, AMS 5629.

• Nickel-Based Superalloys (For High-Temp Locking):

  • Inconel®: Inconel 600 (UNS N06600), Inconel 625 (UNS N06625 / ASTM B446), Inconel 718 (UNS N07718 / AMS 5663).

  • Monel®: Monel 400 (UNS N04400), Monel K500 (UNS N05500 / AMS 4676).

  • Hastelloy®: Hastelloy C276 (UNS N10276 / ASTM B574), Hastelloy C22 (UNS N06022), Hastelloy B2/B3 (UNS N10665/N10675).

  • Incoloy®: Incoloy 825 (UNS N08825), Incoloy 925 (UNS N09925).

  • Waspaloy (UNS N07001): AMS 5708.

  • Nimonic® Alloys: Nimonic 80A (UNS N07080), Nimonic 90 (UNS N07090) per BS HR standards.

• Duplex & Super Duplex Stainless Steels:

  • Duplex Steel: Duplex 2205 (UNS S32205 / EN 1.4462 / ASTM A182).

  • Super Duplex/6Mo Alloys: Alloy 926 (UNS N08926), AL-6XN® (UNS N08367). NACE MR0175 compliant.

• Titanium Alloys (Lightweight & Strong):

  • Grade 2 (UNS R50400): ASTM B348.

  • Grade 5, Ti-6Al-4V (UNS R56400): AMS 4928, ASTM F467.

• Refractory & Exotic Metals:

  • Tantalum (UNS R05200): ASTM B365.

  • Zirconium 702 (UNS R60702): ASTM B550.

  • Molybdenum (UNS R03600) & Tungsten.

• Specialty Corrosion-Resistant Alloys:

  • Nitronic®: Nitronic 50 (XM-19, UNS S20910), Nitronic 60 (UNS S21800).

  • High-Performance Stainless: 254 SMO (UNS S31254 / EN 1.4547), 310SS (UNS S31000), Alloy 20 (Carpenter 20, UNS N08020), Alloy 330 (UNS N08330).

• Ultra-High-Strength Alloys:

  • MP35N (UNS R30035): AMS 5844.

  • MP159: AMS 5846.

• High-Strength Aluminum & Iron-Based Superalloy:

  • Aluminum 7075 (UNS A97075): AMS QQ-A-225/9 (T6 temper).

  • A286 (UNS S66286): AMS 5731, ASTM A453 Gr. 660.

• Pure Nickel:

  • Nickel 200 / 201 (UNS N02200 / N02201): ASTM B160.

Custom Lock Nut Manufacturing & Certification

RAYCHIN provides engineered solutions for your most challenging locking problems.

• Design & Prototyping: We work from your specifications or CAD models to develop and test prototypes.

• Specialized Production: Capabilities include CNC machining, cold forming, insert molding, and precision heat treatment.

• Testing & Validation: We perform prevailing torque tests, vibration testing (e.g., Junker test), and temperature cycling as required.

• Full Certification & Traceability: Supplied with MTRs (EN 10204 3.1) and compliant with AS9100, ISO 9001, MIL-STD, and NADCAP requirements.

Key Industries & Applications

• Aerospace & Defense (NASM/MS Standards): Flight control systems, engine components, avionics, weapon systems.

• Automotive & Motorsport: Engine assemblies, drivetrain components, suspension systems.

• Energy & Industrial: Turbines, generators, pumps, compressors, and high-vibration machinery.

• Transportation: Rail systems, marine engines, off-highway equipment.

• Electronics & Robotics: Precision assemblies requiring secure, maintenance-free fastening.

Secure Your Assembly with RAYCHIN Lock Nuts
Contact our engineering team to discuss your application requirements and request a quote for standard or custom lock nuts.

Lock Nuts, Nyloc Nuts, Nylon Insert Lock Nuts, All-Metal Lock Nuts, Prevailing Torque Lock Nuts, DIN 985 Nuts, ISO 7040 Nuts, MIL-N-25027 Nuts, Aerospace Lock Nuts, Vibration Resistant Nuts, High-Temperature Lock Nuts, Self-Locking Nuts, Custom Lock Nuts, 17-4 PH Lock Nuts, Inconel 718 Lock Nuts, Inconel 625 Lock Nuts, Monel Lock Nuts, Hastelloy C276 Lock Nuts, Titanium Lock Nuts, Duplex Steel Lock Nuts, Alloy 926 Lock Nuts, MP35N Lock Nuts, A286 Lock Nuts, Nitronic 60 Lock Nuts, Alloy 20 Lock Nuts, PH 13-8 Mo Lock Nuts, Waspaloy Lock Nuts, Top Lock Nuts, Serrated Flange Nuts, Castle Nuts, OEM Lock Nuts, Vibration Proof Fasteners, Anti-Loosen Nuts, Reusable Lock Nuts, Global Lock Nut Supplier, Special Alloy Fastener Manufacturer.