The Bolt,shoulder, cataloged under National Stock Number 5306-01-021-8356, 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14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-021-8356 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Fastener Length | 3.830 INCHES NOMINAL IN |
| Shoulder Length | 1.080 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.623 INCHES MINIMUM AND 0.624 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.260 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-6758,COND D1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 3.680 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 |
|---|---|
| 220-24526-103 | 5/2 Secondary reference U.S. Government activity |
| 220-24526-104 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-021-8356 is a Bolt,shoulder, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-021-8356: Fastener Length: 3.830 INCHES NOMINAL IN; Shoulder Length: 1.080 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 0.623 INCHES MINIMUM AND 0.624 INCHES MAXIMUM FIRST SHOULDER IN; Thread Length: 0.260 INCHES NOMINAL 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.