The Bolt,internal Wrenching, cataloged under National Stock Number 5306-01-475-3355, 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16 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-475-3355 |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Width Across Flats | 0.375 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN |
| Head Height | 0.500 INCHES NOMINAL IN |
| Fastener Length | 3.938 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416, TY II, CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.813 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 5TH MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | BEVEL-CONICAL |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| NASM20008-50 | 3/2 Design control — primary reference U.S. Government activity |
| MS20008-50 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-475-3355 is a Bolt,internal Wrenching, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-475-3355: Width Across Flats: 0.375 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN; Head Height: 0.500 INCHES NOMINAL IN; Fastener Length: 3.938 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416, TY II, CL 2 FED SPEC 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.