The Bolt,square Neck, cataloged under National Stock Number 5306-00-012-9136, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-012-9136 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Neck Length | 0.281 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Head Height | 0.188 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN |
| Fastener Length | 9.469 INCHES MINIMUM AND 9.531 INCHES MAXIMUM IN |
| Thread Length | 1.188 INCHES MINIMUM IN |
| Hardness Rating | 79.0 ROCKWELL B MINIMUM AND 90.0 ROCKWELL B MAXIMUM OVERALL |
| Material Document and Classification | QQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | OVAL |
| Thread Direction | RIGHT-HAND |
| Neck Width | 0.368 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OR ZINC OVERALL |
| Minimum Tensile Strength | 40000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 48000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 1010 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 1.188 INCHES MINIMUM AND 1.219 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MS35751-92 | 3/1 Design control — primary reference U.S. Government activity |
| MS35751-92 | 5/9 Secondary reference U.S. Government activity |
| 129136 | 5/9 Secondary reference General Motors Corp |
| 129136 | 5/9 Secondary reference Army Weapons Command Attn Amswe-Ree-S |
| 5306000129136 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 5306-00-012-9136 is a Bolt,square Neck, classified under FSC 5306, Bolts. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6675-00-378-9423. Verify interchangeability with system specifications before substitution.
Key specifications for 5306-00-012-9136: Neck Length: 0.281 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN; Head Height: 0.188 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN; Fastener Length: 9.469 INCHES MINIMUM AND 9.531 INCHES MAXIMUM IN; Thread Length: 1.188 INCHES MINIMUM IN. 18 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.