The Bolt,internal Wrenching, cataloged under National Stock Number 5306-01-274-8317, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 24 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-274-8317 |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Width Across Flats | 0.317 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN |
| Head Height | 0.375 INCHES NOMINAL IN |
| Fastener Length | 1.985 INCHES MINIMUM AND 2.015 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ASTM B633 TY 2 CL 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.891 INCHES MINIMUM AND 0.921 INCHES MAXIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | ASTM A322 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A331 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.593 INCHES MINIMUM AND 0.603 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 1.000 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 1.094 INCHES NOMINAL IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.622 INCHES MINIMUM AND 0.624 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.062 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 13 |
| Material | STEEL COMP 4140 OVERALL |
| Third Diameter From Head | 0.396 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.875 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 |
|---|---|
| 2149691 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 5306PL0896958 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5306-01-274-8317 is a Bolt,internal Wrenching, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-274-8317: Width Across Flats: 0.317 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN; Head Height: 0.375 INCHES NOMINAL IN; Fastener Length: 1.985 INCHES MINIMUM AND 2.015 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM B633 TY 2 CL 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 24 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.