The Bolt,shoulder, cataloged under National Stock Number 5306-00-651-1841, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-651-1841 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 6.520 INCHES NOMINAL IN |
| Shoulder Length | 5.720 INCHES MINIMUM AND 5.740 INCHES MAXIMUM FIRST SHOULDER IN |
| Distance From Centerline to Flat | 1.120 INCHES NOMINAL IN |
| Shoulder Diameter | 2.000 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 0.680 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shank Unthreaded Hole Diameter | 0.172 INCHES NOMINAL FIRST HOLE IN |
| Material Document and Classification | MIL-S-5626 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 1.938 INCHES IN |
| Features Provided | CASEHARDENED |
| Head Style | DEE |
| Thread Direction | RIGHT-HAND |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 4140 OVERALL |
| Thread Series Designator | UN |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.260 INCHES NOMINAL FIRST HOLE IN |
| Head Diameter | 2.450 INCHES MINIMUM AND 2.520 INCHES MAXIMUM 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 |
|---|---|
| 66-2691-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-651-1841 is a Bolt,shoulder, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-651-1841: Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 6.520 INCHES NOMINAL IN; Shoulder Length: 5.720 INCHES MINIMUM AND 5.740 INCHES MAXIMUM FIRST SHOULDER IN; Distance From Centerline to Flat: 1.120 INCHES NOMINAL IN. 19 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.