The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-124-3634, 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24 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-124-3634 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Extended Washer Thickness | 0.035 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN |
| Head Height | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Fastener Length | 2.065 INCHES MINIMUM AND 2.085 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | NAS672 ASSN STD SINGLE TREATMENT RESPONSE AND QQ-P-416 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Surface Treatment Document and Classification | TT-E-489,NO. 17875 FED SPEC SINGLE TREATMENT RESPONSE TOP OF HEAD |
| Extended Washer Diameter | 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Thread Length | 0.555 INCHES MINIMUM AND 0.595 INCHES MAXIMUM IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-6049 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | SPLINE EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN |
| Width Between Flats | 0.373 INCHES MINIMUM AND 0.381 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Surface Treatment | PAINT TOP OF HEAD |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 8740 OR STEEL COMP E4340 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| MS14157-04024 | 3/2 Design control — primary reference U.S. Government activity |
| MS14157-04024 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-124-3634 is a Bolt,close Tolerance, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-124-3634: Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Extended Washer Thickness: 0.035 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN; Head Height: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN. 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.