Fasteners Specification / BS Fasteners / ISO Fasteners / DIN Specification / Flat Washer Standards | Check Price
Stainless Steel Coupling Nut | Alloy Steel Coupling Nut | Duplex Steel Coupling Nut | Carbon Steel Coupling Nut
Stainless Steel Coupling Nut
We manufacturer fasteners with size range from M10 to M100 Hex Nuts, Heavy Hex Nut, Cap Nut, Acorn Nut, Serrated Flange Nut, Coupling Nut, Square Nut, Castle Nut, Wing Nut, Flange Lock Nut, Flex Lock Nut, High Nut, Kep Nut, Jam Nut, Nylon Lock Nut, Slotted Nut, Reversible Lock Nut, Custom Nut, T Nuts & other customized Nuts as per Client's requirement.We produce Hot Forged and Coled Formed Nuts Fasteners.
Coupling Nuts
Coupling Nut Applications
Coupling nuts are used to make up long tie rod assemblies from shorter lengths of rod and to facilitate assembly of two fasteners or fittings which each have external threads.
Relevant Standards
Coupling nut dimensions are described by the Industrial Fasteners Institute in standard IFI-128. Chemical and mechanical properties are controlled in conformance with ASTM and SAE nut specifications (ASTM A563, ASTM A194 and SAE J995).
Materials
Standard coupling nuts are produced from ASTM A108 grade 12L14 hexagon or round bars with 50 Ksi minimum yield strength. Other available materials include 1045, 4140, structural grades and stainless steels.
Finishes
Standard finish is plain with either a cold drawn or hot rolled mill finish, depending on the type of bar stock used. Hot dip galvanizing is available as well as zinc electroplating.
Threads
Standard threads are UNC 2B, RH, with other thread series and profiles available by special order. Hot dip galvanized coupling nuts are normally tapped oversize after galvanizing to accommodate the zinc coating on the rod threads. Coupling nuts up to 1-1/2" thread size are tapped all the way through from one end, allowing them to be completely threaded on to one of the members which are to be coupled, a feature that is required for certain assembly situations. Coupling nuts larger than 1-1/2" thread size cannot be tapped all the way through without special extended length taps and are therefore furnished with RH/RH threads (tapped to a depth of L/2 from each end) unless specifically ordered as 'threaded all the way through'.
Coupling nuts can also be threaded with two different thread sizes or profiles. These parts are normally identified as 'reducing coupling nuts'.
Dimensions
Refer to the coupling nut table for dimensions. Some of the sizes listed in this table have an 'Across Flats Size' slightly larger than that called for by IF-128 due to commercial availability of hexagon bar stock. Because of limited availability of hex stock larger than 3-1/2", coupling nuts with thread sizes 2-1/2" and larger are usually made from round bar.
| Thread Diameter ‘D’ |
Width Across Flats ‘F’ |
Width Across Points ‘G’ |
Overall Length ‘L’ |
Weight Each (lbs) |
|---|---|---|---|---|
| 1/2 | 3/4 | 7/8 | 1-1/2 | 0.12 |
| 5/8 | 1 | 1-1/8 | 1-7/8 | 0.30 |
| 3/4 | 1-1/8 | 1-5/16 | 2-1/4 | 0.42 |
| 7/8 | 1-5/16 | 1-7/16 | 2-5/8 | 0.56 |
| 1 | 1-1/2 | 1-3/4 | 3 | 0.99 |
| 1-1/8 | 1-5/8 | 1-7/8 | 3-3/8 | 1.23 |
| 1-1/4 | 1-7/8 | 2-3/16 | 3-3/4 | 1.93 |
| 1-3/8 | 2 | 2-5/16 | 4-1/8 | 2.31 |
| 1-1/2 | 2-1/4 | 2-5/8 | 4-1/2 | 3.33 |
| 1-5/8 | 2-3/4 | 3-3/16 | 4-7/8 | 6.17 |
| 1-3/4 | 2-3/4 | 3-3/16 | 5-1/4 | 6.16 |
| 1-7/8 | 3 | 3-7/16 | 5-5/8 | 7.61 |
| 2 | 3-1/4 | 3-7/16 | 6 | 9.69 |
| 2-1/4 | 3-1/2 | 4-1/16 | 6-3/4 | 12.7 |
| 2-1/2 | 3-7/8 | 4-1/2 | 7-1/2 | 17.2 |
| 2-3/4 | 4-1/4 | 4-15/16 | 8-1/4 | 22.7 |
| 3 | 4-5/8 | 5-5/16 | 9 | 29.2 |
| 3-1/4 | 5 | 5-3/4 | 9-3/4 | 36.8 |
| 3-1/2 | 5-3/8 | 6-3/16 | 10-1/2 | 45.8 |
| 3-3/4 | 5-3/4 | 6-5/8 | 11-1/4 | 56.0 |
| 4 | 6-1/8 | 7-1/16 | 12 | 68.0 |
| 4-1/2 | 6-7/8 | 7-15/16 | 13-1/2 | 96.0 |
| 5 | 7-5/8 | 8-13/16 | 15 | 130.0 |
Stainless Steel Grades & Designation ( Austhentic Stainless Steel )
| AISI Grade Equivalent | JIS Equivalent | Stainless Steel Notation | EN/DIN Numerical Equivalent | UNS designation | EN/DIN Symbolical Equivalent |
| AISI 303 | SUS303 | SS 303 | EN 1.4305 | UNS S30300 | X8CrNiS18-9 |
| AISI 304 | SUS304 | SS 304 | EN 1.4301 | UNS S30400 | X4CrNi18-10 |
| AISI 304L | SUS304L | SS 304L | EN 1..4307 | UNS S30403 | X2CrNi18-9 |
| AISI 304LN | SUS304 LN | SS 304 LN | EN 1.4311 | UNS S30453 | X2CrNiN18-10 |
| AISI 309 | SUS309 | SS 309 | EN 1.4828 | UNS S30900 | X15CrNi23-13 |
| AISI 309S | SUS309 S | SS 309S | EN 1.4833 | UNS S30908 | X15CrNiSi20-12 |
| AISI 310 | SUS310 | SS 310 | EN 1.4841 | UNS S31000 | X15CrNiSi25-20 |
| AISI 310S | SUS310 S | SS 310S | EN 1.4845 | UNS S31008 | X8CrNi25-21 |
| AISI 316 | SUS316 | SS 316 | EN 1.4401 | UNS S31600 | X5CrNiMo17-12-2 |
| AISI 316L | SUS316 L | SS 316 L | EN 1.4404 | UNS S31603 | X2CrNiMo17-12-2 |
| AISI 316Ti | SUS316 Ti | SS 316 Ti | EN 1.4571 | UNS S31635 | X6CrNiMoTi17-12-2 |
| AISI 317 | SUS317 | SS 317 | UNS S31700 | ||
| AISI 317L | SUS317L | SS 317L | EN 1.4438 | UNS S31703 | X2CrNiMo18-15-4 |
| AISI 321 | SUS321 | SS 321 | EN 1.4541 | UNS S32100 | X6CrNiTi18-10 |
| AISI 321H | SUS321 H | SS 321H | EN 1.4878 | UNS S32109 | X12CrNiTi18-9 |
| AISI 347 | SUS347 | SS 347 | EN 1.4550 | UNS S34700 | X6CrNiNb18-10 |
| AISI 347H | SUS347H | SS 347H | EN 1.4961 | UNS S34709 | X6CrNiNb18-12 |
| End of List For Austhentic Stainless Steel | |||||
Stainless Steel Grade Designation ( Martensitic Stainless Steel )
| AISI 409 | SUS409 | SS 409 | EN 1.4512 | UNS S40900 | X2CrTi12 |
| AISI 410 | SUS410 | SS 410 | EN 1.4006 | UNS S41000 | X 10 Cr 13 |
| AISI 410S | SUS410S | SS 410S | EN 1..4516 | UNS S41008 | X6CrNiTi12 |
| AISI 416 | SUS416 | SS 416 | EN 1.4005 | UNS S41600 | X 12 CrS 13 |
| AISI 420 | SUS420J1 | SS 304 | EN 1.4021 | UNS S42000 | X 20 Cr 13 |
| AISI 420F | SUS420F | SS 420F | - | UNS S42020 | - |
| AISI 429 | SUS429 | SS 429 | - | UNS S42900 | |
| AISI 430 | SUS430 | SS 430 | EN 1.4016 | UNS S43000 | X 8 Cr 17 |
| AISI 430F | SUS430F | SS 430F | En 1.4104 | UNS S43020 | X 12 CrMoS 17 |
| AISI 446C | SUS446 | SS 446C | EN 1.4762 | UNS S44600 | X4CrNi18-10 |
| End of List For Martensitic Stainless Steel | |||||
Stainless Steel Grade Designation ( Super Austhenitic Stainless Steel )
| AISI 904L | QS 2025 MC | SS 904L | EN 1.4539 | UNS N08904 | X1NiCrMoCu25-20-5 |
| End of List For Super Austhentic Stainless Steel | |||||
Stainless Steel Coupling Nut Application Industries
Sunflex Metal Industries are engaged in manufacturing of robust quality of Stainless Steel Coupling Nut. These Stainless Steel Coupling Nut are widely used in the following industries:
Mining Industries Transport Industries- Rail and Road Construction Industries / Building Systems Manufacturing Industries Agriculture Industries Energy Industries Water Industries Automotive Industries Ship Building Industries Nuclear Power Plant Paper & Pulp Industries Sugar Industries Engineering Cement Industries Petro-Chemical Industries Food Industries Oil & Gas Industries Chemical & Pharmaceutical Industries
Share This Page
