The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-003-4159, 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21 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-003-4159 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.282 INCHES MINIMUM AND 0.282 INCHES MINIMUM AND 0.297 INCHES MAXIMUM0.297 INCHES MAXIMUM IN |
| Fastener Length | 2.349 INCHES MINIMUM AND 2.349 INCHES MINIMUM AND 2.369 INCHES MAXIMUM2.369 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Thread Length | 0.511 INCHES MINIMUM AND 0.511 INCHES MINIMUM AND 0.687 INCHES MAXIMUM0.687 INCHES MAXIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 41.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.141 INCHES MINIMUM AND 0.151 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | MIL-B-83050 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.562 INCHES IN |
| Head Style | DISHED HEXAGONDISHED HEXAGON |
| Thread Direction | RIGHT-HANDRIGHT-HAND |
| Grip Length | 1.562 INCHES MINIMUM AND 1.578 INCHES MAXIMUM IN |
| Width Between Flats | 0.865 INCHES MINIMUM AND 0.865 INCHES MINIMUM AND 0.877 INCHES MAXIMUM0.877 INCHES MAXIMUM IN |
| Grip Diameter | 0.5607 INCHES MINIMUM AND 0.5607 INCHES MINIMUM AND 0.5616 INCHES MAXIMUM0.5616 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Thread Class | 3A3A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.224 INCHES MINIMUM AND 2.254 INCHES MAXIMUM FIRST HOLE 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 |
|---|---|
| CA4510-9-25 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Tridair Products |
| MS27576-9-25R | 3/2 Design control — primary reference U.S. Government activity |
| 106467-9-25 | 5/2 Secondary reference U.S. Government activity |
| MS27576-9-25 | 5/9 Secondary reference U.S. Government activity |
| MS27576-9-25 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-003-4159 is a Bolt,close Tolerance, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-003-4159: Surface Finish: 63.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.282 INCHES MINIMUM AND 0.282 INCHES MINIMUM AND 0.297 INCHES MAXIMUM0.297 INCHES MAXIMUM IN; Fastener Length: 2.349 INCHES MINIMUM AND 2.349 INCHES MINIMUM AND 2.369 INCHES MAXIMUM2.369 INCHES MAXIMUM IN. 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.