The Bolt,internal Wrenching, cataloged under National Stock Number 5306-01-573-3395, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-573-3395 |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Width Across Flats | 0.376 INCHES MINIMUM AND 0.379 INCHES MAXIMUM IN |
| Head Height | 0.500 INCHES NOMINAL IN |
| Fastener Length | 3.797 INCHES MINIMUM AND 3.827 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416, TYPE II. CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.807 INCHES MINIMUM AND 0.817 INCHES MAXIMUM IN |
| Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Hole Configuration Style | ROUND INTERNAL HEXAGON |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | BEVEL-CONICAL |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 27400 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Hole Quantity | 4 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.550 INCHES NOMINAL IN |
| Head Diameter | 0.818 INCHES MINIMUM AND 0.828 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 |
|---|---|
| NASM20008H48 | 3/2 Design control — primary reference U.S. Government activity |
| MS20008H48 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-573-3395 is a Bolt,internal Wrenching, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-573-3395: Width Across Flats: 0.376 INCHES MINIMUM AND 0.379 INCHES MAXIMUM IN; Head Height: 0.500 INCHES NOMINAL IN; Fastener Length: 3.797 INCHES MINIMUM AND 3.827 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416, TYPE II. CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 21 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.