The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-00-973-0129, 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19 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-973-0129 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.390 INCHES MINIMUM AND 0.410 INCHES MAXIMUM IN |
| Fastener Length | 1.150 INCHES MINIMUM AND 1.180 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2 CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Thread Length | 0.500 INCHES MINIMUM IN |
| Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | CONCENTRIC HOLE UNTHREADED |
| Material Document and Classification | MIL-S-5626 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Counterbore Depth | 0.120 INCHES NOMINAL IN |
| Head Style | SQUARE |
| Thread Direction | RIGHT-HAND |
| Counterbore Diameter | 0.515 INCHES NOMINAL IN |
| Width Between Flats | 0.747 INCHES MINIMUM AND 0.753 INCHES MAXIMUM IN |
| Concentric Hole Diameter | 0.164 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 4140 OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 58A63C62 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 5306-00-973-0129 is a Bolt,internally Relieved Body, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-973-0129: Head Height: 0.390 INCHES MINIMUM AND 0.410 INCHES MAXIMUM IN; Fastener Length: 1.150 INCHES MINIMUM AND 1.180 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2 CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL; Thread Length: 0.500 INCHES MINIMUM 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.