The Bolt,square Neck, cataloged under National Stock Number 5306-01-370-6947, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-370-6947 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Neck Length | 0.156 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN |
| Head Height | 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN |
| Fastener Length | 0.856 INCHES MINIMUM AND 1.580 INCHES MAXIMUM IN |
| Thread Length | 1.168 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.334 INCHES IN |
| Head Style | BUTTON |
| Thread Direction | RIGHT-HAND |
| Nondefinitive Spec/std Data | 1 TYPE AND 1 CLASS AND A STYLE |
| Neck Width | 0.307 INCHES MINIMUM AND 0.324 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 50000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | COPPER ALLOY 651 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.688 INCHES MINIMUM AND 0.719 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 |
|---|---|
| ASME-B18.5 | 5/1 Secondary reference The American Society of Mechanical Engineers |
| FF-B-564 | 5/9 Secondary reference U.S. Government activity |
| MS16207-26 | 2/2 Government specification standardization U.S. Government activity |
NSN 5306-01-370-6947 is a Bolt,square Neck, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-370-6947: Neck Length: 0.156 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN; Head Height: 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN; Fastener Length: 0.856 INCHES MINIMUM AND 1.580 INCHES MAXIMUM IN; Thread Length: 1.168 INCHES NOMINAL IN. 15 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.