The Bolt,shoulder, cataloged under National Stock Number 5306-01-280-3644, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-280-3644 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.210 INCHES NOMINAL IN |
| Fastener Length | 3.940 INCHES NOMINAL IN |
| Shoulder Length | 0.240 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Length | 0.260 INCHES NOMINAL THIRD SHOULDER IN |
| Shoulder Length | 2.770 INCHES NOMINAL SECOND SHOULDER IN |
| Shoulder Diameter | 0.560 INCHES MINIMUM AND 0.562 INCHES MAXIMUM THIRD SHOULDER IN |
| Shoulder Diameter | 0.685 INCHES MINIMUM AND 0.686 INCHES MAXIMUM SECOND SHOULDER IN |
| Shoulder Diameter | 0.874 INCHES MINIMUM AND 0.875 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.505 INCHES NOMINAL IN |
| Shoulder Shape | ROUND ALL SHOULDERS |
| Material Document and Classification | MIL-S-8844 CLASS 1 COND E-2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.125 INCHES NOMINAL IN |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 4340 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| 4F69210-101A | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-280-3644 is a Bolt,shoulder, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-280-3644: Head Height: 0.210 INCHES NOMINAL IN; Fastener Length: 3.940 INCHES NOMINAL IN; Shoulder Length: 0.240 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Length: 0.260 INCHES NOMINAL THIRD SHOULDER IN. 20 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.