Lock Nuts
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Sunmach is a leading manufacturer and supplier of Duplex 2205 Jam Nuts & Lock Nuts, engineered for vibration-resistant fastening in demanding industrial environments. Manufactured from UNS S32205 / S31803 Duplex Stainless Steel, our Duplex Jam Nuts and Duplex Lock Nuts offer exceptional resistance to pitting, crevice corrosion and chloride stress corrosion cracking while providing nearly twice the strength of conventional 316L stainless steel fasteners. Designed in accordance with DIN 439-B, ISO 7041, ANSI B18.2.2 and ISO 9001:2015 quality Standards, these nuts are widely used in offshore oil & gas, desalination plants, chemical processing, petrochemical, power generation, marine and aerospace industries where vibration, thermal cycling and corrosive environments demand secure fastening. With over 13 years of manufacturing , Sunmach exports premium Duplex Stainless Steel Jam Nuts & Duplex Lock Nuts to customers across the GCC, Europe, Southeast Asia and other global markets. Our Duplex Jam Nuts & Duplex Lock Nuts are manufactured using certified raw materials from globally recognized mills and undergo stringent quality inspections, including ICP/OES chemical analysis, precision thread rolling, solution annealing, hardness testing, ASTM G48 corrosion testing, locking torque verification, vibration endurance testing and complete dimensional inspection. Available in metric and imperial sizes with coarse and fine thread options, these all-metal locking nuts provide superior clamp load retention, high-temperature performance and reliable resistance against loosening in severe operating conditions. Every batch is fully traceable and supplied with a Certificate of Conformance (CoC), making Sunmach a trusted partner for OEMs, EPC contractors and industrial projects requiring premium Duplex 2205 Jam Nuts, Duplex 2205 Lock Nuts, Duplex Lock Nuts and Duplex Stainless Steel Fasteners.
Lock Nuts
Sunmach is one of the leading global manufacturer and supplier of Standard & Custom made Premium Nickel Alloys Lock Nuts engineered for the most critical industrial applications. We are an ISO 9001:2015 certified company, demonstrating our commitment to rigorous quality standards and consistent product excellence to deliver the best of the Nickel Alloys & Special Steel Fasteners.
Nickel Alloys Lock Nuts are manufactured by us from a range of high-performance & exotic materials such as : Hastelloy® C-276, Hastelloy® C-22, Hastelloy® B-2, Monel® 400, Monel® K-500, Inconel® 600, Inconel® 625, Inconel® 718, Titanium Grade 2, Titanium Grade 5, Titanium Grade 7, Duplex S31803, Duplex S32205, Super Duplex S32750 to various Stainless Steel grades of SS 304L, SS 316L SS 310, SS 310H, SS 347H, etc followed by Special Stainless Steel Grades such as 904L Stainless Steel, UNS N08904, DIN EN1.4539 Nitronic® 50, Nitronic® 60, UNS S21800, DIN EN, 254 SMO, UNS S31254, DIN EN 1.454, A4-80 Stainless Steel etc.
Sunmach’s extensive manufacturing capabilities and In-Stock Genuine & Authentic Raw Material availability allows us to support demanding industrial requirements with durable, corrosion-resistant, heat resistant & reliable Nickel Alloys Lock Nuts delivered dot in time to any corner of the world, supported by all required test certificates and with 100% traceability.
Nickel Alloy Lock Nuts Specifications
Using Advanced Hot Forming Technology, Our Nickel Alloys Lock Nuts are manufactured in various specifications including DIN, ISO, ANSI and IS standard in nominal diameters ranging from 1/4” to 3” (M6 to M76). We provide Lock Nuts in both Imperial and metric sizes to accommodate diverse application needs. Our Nickel Alloys Lock Nuts are specially engineered to withstand high temperature and high-pressure, ensuring superior strength and reliability.
Nickel Alloy Lock Nuts Application Industries
unmach serves a diverse range of markets including Chemical Processing, Semiconductor, Power Generation, Aerospace, Oil & Gas, Pharmaceutical, Food & Beverage, Marine, Pulp & Paper, Petrochemical & Refining, Air Pollution Control and Water Treatment.
Sizes
| Metric : | M6 to M76 |
| Imperial : | 1/4" to 3" |
| MOQ : | 1 Piece & Above |
| Certification : | EN 10204 3.1, EN 10204 3.2 (On Demand) |
Specification
| Bolt | DIN | ISO | ANSI | IS |
|---|---|---|---|---|
| Lock Nut | 931 | 4014 | B18.2.1 | 1364 |
Dimensions - Imperial
Dimensions - Metric
Frequently Asked Questions
Common questions about Sunmach Duplex Jam Nuts & Lock Nuts
Vibration-resistant fastening in high-temperature (>100°C) and extreme-vibration environments.
Jam nuts for cost-effective dual-nut locking, lock nuts for compact single-nut solution.
All-metal design works reliably above 100°C where nylon fails.
Much stronger and better corrosion resistance for seawater and chloride service.
Oil & gas, desalination, chemical, power generation and marine.