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Weld Nut Spec Table
Weld Nut Specifications — 6 sizes
A nut permanently fixed by welding to a metal part, providing a threaded point for subsequent bolt fastening.
Practical Notes
- Weld spatter on threads prevents bolt insertion. Temporarily thread a bolt before welding to protect threads, or chase (retap) after welding.
- Projection welding is standard. Precisely set current, time, and pressure. Incorrect parameters cause nut detachment.
Selection Guide
Permanently welded to sheet metal. Use when stronger fixation than rivet nuts is needed with single-side access. Projection welding is standard; thread protection after welding (spatter removal or retapping) is essential.
Weld Nut
6 sizes| Nominal | d | P | H (Height) | B (Wrench) | Other |
|---|---|---|---|---|---|
| M4 | 4 | 0.7 | 4 | 11 | - |
| M5 | 5 | 0.8 | 5 | 13 | - |
| M6 | 6 | 1 | 5.5 | 15 | - |
| M8 | 8 | 1.25 | 6.5 | 18 | - |
| M10 | 10 | 1.5 | 8 | 21 | - |
| M12 | 12 | 1.75 | 10 | 24 | - |
Key Features
- Projection welded (3–4 projections) permanently to sheet, creating bolt fastening point
- DIN 929 square weld nut / DIN 928 hex weld nut standards
- Thread protection after welding essential; spatter guard or post-weld retapping recommended
Key Applications
Automotive body weld lines, construction equipment frames, steel structure joints, appliance chassis, industrial machine brackets
FAQ
Difference between weld nut and clinch nut?
Weld nuts are welded (stronger fixation); clinch nuts are press-fitted (no heat distortion). Choose clinch for no-distortion requirements; weld for maximum strength.