The Bolt,shoulder, cataloged under National Stock Number 5306-00-281-6318, 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18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-281-6318 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.812 INCHES NOMINAL IN |
| Fastener Length | 6.125 INCHES NOMINAL IN |
| Shoulder Length | 4.250 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 1.250 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 1.375 INCHES MINIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shank Unthreaded Hole Diameter | 0.156 INCHES NOMINAL FIRST HOLE IN |
| Material Document and Classification | MIL-S-890,ALLOY 2 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 1.125 INCHES IN |
| Head Style | ROUND W/WRENCH FLATS CHAMFERED |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.438 INCHES NOMINAL IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 7 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 5.953 INCHES NOMINAL FIRST HOLE IN |
| Head Diameter | 1.688 INCHES NOMINAL 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 |
|---|---|
| H1024110-108 | 3/9 Design control — primary reference AC Valve Inc |
NSN 5306-00-281-6318 is a Bolt,shoulder, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-281-6318: Head Height: 0.812 INCHES NOMINAL IN; Fastener Length: 6.125 INCHES NOMINAL IN; Shoulder Length: 4.250 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 1.250 INCHES NOMINAL 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.