The Bolt,shoulder, cataloged under National Stock Number 5306-01-161-7284, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Bae Systems Land & Armaments L.p.. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 — Bolts (FSG 53) |
| Manufacturers | Bae Systems Land & Armaments L.p. (CAGE 54786); Amz Alabama Inc. (CAGE 076M6) |
| Parameter | Value |
|---|---|
| NSN | 5306-01-161-7284 |
| Primary Part Number | 4390725 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Bae Systems Land & Armaments L.p. |
| Status | ACTIVE |
| Head Height | 2.000 INCHES NOMINAL IN |
| Fastener Length | 4.750 INCHES NOMINAL IN |
| Shoulder Length | 3.500 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.996 INCHES MINIMUM AND 0.998 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 1.125 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | QQ-N-281 CL A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | ROUND W/WRENCH FLATS |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.000 INCHES NOMINAL IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 10 |
| Material | NICKEL ALLOY 400 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 1.250 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 |
| Part Number | Manufacturer |
|---|---|
| 4390725 PRIMARY | Bae Systems Land & Armaments L.p. (USA) |
| 4390725 | Amz Alabama Inc. (USA) |
| Reference | Meaning |
|---|---|
| SSN685-522-4390725 PIECE 11 | 5/9 Secondary reference U.S. Government activity |
| 4390725 | 3/9 Design control — primary reference Bae Systems Survivability Systems Llc |
NSN 5306-01-161-7284 is a Bolt,shoulder, manufactured by Bae Systems Land & Armaments L.p., classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-161-7284 has 2 manufacturer part numbers on file: 4390725 (Bae Systems Land & Armaments L.p.), 4390725 (Amz Alabama Inc.).
Key specifications for 4390725: Head Height: 2.000 INCHES NOMINAL IN; Fastener Length: 4.750 INCHES NOMINAL IN; Shoulder Length: 3.500 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 0.996 INCHES MINIMUM AND 0.998 INCHES MAXIMUM FIRST SHOULDER IN. 16 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.