The Bolt,square Neck, cataloged under National Stock Number 5306-00-012-8676, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Army Weapons Command Attn Amswe-Ree-S. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5306-00-012-8676 |
| Primary Part Number | 128676 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Army Weapons Command Attn Amswe-Ree-S |
| Status | ACTIVE |
| Neck Length | 0.156 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN |
| Head Height | 0.156 INCHES NOMINAL IN |
| Fastener Length | 3.000 INCHES NOMINAL IN |
| Thread Length | 0.875 INCHES MINIMUM IN |
| Hardness Rating | 90.0 ROCKWELL B MINIMUM AND 99.0 ROCKWELL B MAXIMUM OVERALL |
| Material Document and Classification | SAE GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | OVAL |
| Thread Direction | RIGHT-HAND |
| Neck Width | 0.307 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OR ZINC OVERALL |
| Minimum Tensile Strength | 90000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 58000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 1.000 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 128676 | Army Weapons Command Attn Amswe-Ree-S (USA) |
| Reference | Meaning |
|---|---|
| 128676 | 5/9 Secondary reference General Motors Corp |
NSN 5306-00-012-8676 is a Bolt,square Neck, manufactured by Army Weapons Command Attn Amswe-Ree-S, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-012-8676 has 1 manufacturer part number on file: 128676 (Army Weapons Command Attn Amswe-Ree-S).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-089-2536. Verify interchangeability with system specifications before substitution.
Key specifications for 128676: Neck Length: 0.156 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN; Head Height: 0.156 INCHES NOMINAL IN; Fastener Length: 3.000 INCHES NOMINAL IN; Thread Length: 0.875 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.