The Bolt,shoulder, cataloged under National Stock Number 5306-01-421-4216, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-421-4216 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN |
| Fastener Length | 1.480 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN |
| Shoulder Length | 0.900 INCHES NOMINAL FIRST SHOULDER IN |
| Surface Treatment Document and Classification | BX-12, TY A CL 2 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.492 INCHES MINIMUM AND 0.496 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.497 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 4037 AND STEEL COMP 4140 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 4151413 | 3/9 Design control — primary reference Allied Automotive Allied Aftermarket Div |
NSN 5306-01-421-4216 is a Bolt,shoulder, classified under FSC 5306, Bolts. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5310-01-674-0614. Verify interchangeability with system specifications before substitution.
Key specifications for 5306-01-421-4216: Head Height: 0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN; Fastener Length: 1.480 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN; Shoulder Length: 0.900 INCHES NOMINAL FIRST SHOULDER IN; Surface Treatment Document and Classification: BX-12, TY A CL 2 MFR REF SINGLE TREATMENT RESPONSE OVERALL. 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.