The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-306-4184, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-306-4184 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Extended Washer Thickness | 0.071 INCHES MINIMUM AND 0.091 INCHES MAXIMUM IN |
| Head Height | 0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN |
| Fastener Length | 3.685 INCHES MINIMUM AND 3.715 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-8837 TY 2,CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 1.037 INCHES MINIMUM AND 1.047 INCHES MAXIMUM IN |
| Thread Length | 0.925 INCHES MINIMUM AND 0.975 INCHES MAXIMUM IN |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.562 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 2.740 INCHES MINIMUM AND 2.760 INCHES MAXIMUM IN |
| Width Between Flats | 0.610 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Grip Diameter | 0.560 INCHES MINIMUM AND 0.561 INCHES MAXIMUM IN |
| Surface Treatment | CHROMATE AND CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP H11 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 |
|---|---|
| NASM8906 | 3/1 Design control — primary reference U.S. Government activity |
| MS21297-09044 | 5/9 Secondary reference U.S. Government activity |
| NASM21297 | 3/1 Design control — primary reference U.S. Government activity |
| 5306PL2099334 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MS21297-09044 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-306-4184 is a Bolt,close Tolerance, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-306-4184: Extended Washer Thickness: 0.071 INCHES MINIMUM AND 0.091 INCHES MAXIMUM IN; Head Height: 0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN; Fastener Length: 3.685 INCHES MINIMUM AND 3.715 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-8837 TY 2,CL 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 19 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.