The Bolt,shoulder, cataloged under National Stock Number 5306-00-078-3443, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-078-3443 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.120 INCHES NOMINAL IN |
| Fastener Length | 2.170 INCHES MINIMUM AND 2.230 INCHES MAXIMUM IN |
| Shoulder Length | 1.860 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.3116 INCHES MINIMUM AND 0.3118 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.310 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 33.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.070 INCHES NOMINAL FIRST HOLE IN |
| Material Document and Classification | MIL-S-5626 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.500 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM THREADS |
| Surface Treatment | CHROMIUM GRIP |
| Surface Treatment | CADMIUM HEAD |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 4140 OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.080 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 |
|---|---|
| 215-70600-2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-078-3443 is a Bolt,shoulder, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-078-3443: Head Height: 0.120 INCHES NOMINAL IN; Fastener Length: 2.170 INCHES MINIMUM AND 2.230 INCHES MAXIMUM IN; Shoulder Length: 1.860 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 0.3116 INCHES MINIMUM AND 0.3118 INCHES MAXIMUM FIRST SHOULDER IN. 22 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.