The Bolt,shoulder, cataloged under National Stock Number 5306-01-040-4648, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5306-01-040-4648 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.220 INCHES NOMINAL IN |
| Fastener Length | 0.750 INCHES NOMINAL IN |
| Shoulder Length | 0.380 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.371 INCHES MINIMUM AND 0.374 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.308 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 316 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 108305-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-040-4648 is a Bolt,shoulder, classified under FSC 5306, Bolts. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 1680-01-458-0020. Verify interchangeability with system specifications before substitution.
Key specifications for 5306-01-040-4648: Head Height: 0.220 INCHES NOMINAL IN; Fastener Length: 0.750 INCHES NOMINAL IN; Shoulder Length: 0.380 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 0.371 INCHES MINIMUM AND 0.374 INCHES MAXIMUM FIRST SHOULDER IN. 14 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.