The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-01-373-0221, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-373-0221 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.500 INCHES NOMINAL IN |
| Fastener Length | 0.836 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35,TYIII FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Internal Thread Length | 0.188 INCHES NOMINAL CONCENTRIC HOLE IN |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) CONCENTRIC HOLE |
| Internal Thread Direction | RIGHT-HAND CONCENTRIC HOLE |
| Thread Length | 0.500 INCHES NOMINAL IN |
| Threads Per Inch | 32 CONCENTRIC HOLE |
| Style Designator | CONCENTRIC HOLE THREADED |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | FILLISTER |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.164 INCHES CONCENTRIC HOLE IN |
| Internal Thread Class | 2B CONCENTRIC HOLE |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.300 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 |
|---|---|
| 60268-40018 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-373-0221 is a Bolt,internally Relieved Body, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-373-0221: Head Height: 0.500 INCHES NOMINAL IN; Fastener Length: 0.836 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35,TYIII FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Internal Thread Length: 0.188 INCHES NOMINAL CONCENTRIC HOLE IN. 20 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.