American SAE J531 Taper Thread Pipe Plugs and Drain Plugs
Society of Automotive Engineers
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| Size | Square Head | Hex Head | Hex Socket | Square Socket | Inside Hex Head | Slotted Headless | Six Lobe |
| 1/16 - 27 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 1/8 - 27 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 1/4 - 18 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 3/8 - 18 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 1/2 - 14 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 3/4 - 14 | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | |
| 1" - 11.5 | ✓ | ✓ | ✓ | ✓ | |||
| ✓ = Currently Produced | Request A Quote » |
Pipe plugs and drain plugs manufactured to this Standard are used primarily with assemblies of components for the automotive and transportation equipment industries. As such they are probably the most widely specified and used designs of taper thread pipe plugs.
Available Materials
- Steel (Low Carbon, Medium Carbon, Alloy)
- Stainless Steel
- Brass
- Aluminum
Parts may not be produced in all materials noted above.