Double End Studs (DIN 938 / DIN 939)
Double end studs have a thread at each end and a plain shank in the middle. They are used where a through bolt is not practical — typically on flange joints, valve and pipe connections and equipment that must be dismantled from one side only. DIN 938 has a thread length of about one diameter; DIN 939 has a longer thread of about 1.25 diameters for use in softer materials.
Technical Specifications
| Parameter | Specification |
|---|---|
| Standard | DIN 938 / DIN 939 (also DIN 940, DIN 2510 on request) |
| Type | Double end threaded stud, plain shank centre |
| Size Range | M6 – M36 |
| Grade | 4.8 / 8.8 / 10.9 / B7 / B16 |
| Material | Carbon Steel / Alloy Steel / Stainless Steel SS304, SS316 |
| Surface Finish | Black Oxide, Zinc Plated, Hot Dip Galvanized, Plain |
| Thread | Metric Coarse (metric fine on request) |
| Supplied With | Plain or with matching hex nuts and washers |
| MOQ | 500 pcs (standard), 2,000 pcs (custom) |
| Lead Time | 7-15 days (standard), 20-30 days (custom) |
| Packaging | Bulk cartons / Wooden pallets / Custom labeling |
Available Sizes
M6, M8, M10, M12, M16, M20, M24, M30, M36 with lengths 30mm – 500mm
Applications
- Flange and pipe joints
- Valve and pump connections
- Heat exchanger assemblies
- Structural steel connections
- Machinery and equipment assembly
- Turbine and compressor maintenance
Certifications
ISO 9001:2015 certified. Material certificates (EN 10204 3.1/3.2). RoHS and REACH compliant.
Frequently Asked Questions
What is a double end stud used for?
A double end stud has threads on both ends (DIN 938 tap-end / DIN 939 full threads). One end screws permanently into a tapped hole or flange; the other takes the nut — standard for flange pipework, cylinder heads and joints that are opened repeatedly.
What sizes are available?
Available sizes range from M6 – M36. Contact us with your required sizes and quantities for a quick quote.
What is the MOQ and lead time?
The MOQ is 500 pcs (standard), 2,000 pcs (custom). Lead time is 7-15 days (standard), 20-30 days (custom). Mixed-size containers and larger orders are negotiable — send us your requirement for a quick quote.
Do you provide material certificates?
Yes. Material test certificates per EN 10204 3.1 are available on request, and our manufacturing is ISO 9001:2015 certified. RoHS and REACH compliance documentation can also be provided.
