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This GM-style SEMS screw features a 3/8"-16 coarse thread, 1-inch length, and hex head for compatible automotive fastening applications. Its preassembled 1-inch outside-diameter washer helps distribute the clamping load while keeping the screw and washer together during installation.
The fastener has a phosphate finish and a 9/16-inch hex drive. It cross-references GM part numbers 3986997 and 14011722; verify the thread size, length, washer diameter, hex size, and OEM reference before installation.
| Product Type | Hex Head SEMS Screw |
| Thread Size | 3/8"-16 |
| Length | 1" |
| Head Style | Hex Head |
| Hex Size | 9/16" |
| Washer Type | SEMS Washer |
| Washer Outside Diameter | 1" |
| Finish | Phosphate |
| Vehicle Manufacturer | GM |
| OEM Cross-References | 3986997 and 14011722 |
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