The Bolt,shoulder, cataloged under National Stock Number 5306-00-052-6952, 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18 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5306-00-052-6952 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.140 INCHES NOMINAL IN |
| Fastener Length | 0.937 INCHES NOMINAL IN |
| Shoulder Length | 0.545 INCHES MINIMUM AND 0.550 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.3112 INCHES MINIMUM AND 0.3117 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.390 INCHES MINIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.081 INCHES NOMINAL FIRST HOLE IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.500 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 410 OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.734 INCHES NOMINAL FIRST HOLE 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 |
|---|---|
| 127434 | 5/9 Secondary reference U.S. Government activity |
| 127434 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-052-6952 is a Bolt,shoulder, classified under FSC 5306, Bolts. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6750-01-427-1029. Verify interchangeability with system specifications before substitution.
Key specifications for 5306-00-052-6952: Head Height: 0.140 INCHES NOMINAL IN; Fastener Length: 0.937 INCHES NOMINAL IN; Shoulder Length: 0.545 INCHES MINIMUM AND 0.550 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.3112 INCHES MINIMUM AND 0.3117 INCHES MAXIMUM FIRST SHOULDER 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.