The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-662-2503, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-662-2503 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN |
| Fastener Length | 3.954 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | AMS-QQ-P-416, TYPE II, CLASS2 ASSN STD SINGLE TREATMENT RESPONSE AND BPS-F-69 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.454 INCHES NOMINAL IN |
| Material Document and Classification | AMS5853 ASSN STD SINGLE MATERIAL RESPONSE AND AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.3125 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 3.500 INCHES NOMINAL IN |
| Width Between Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Grip Diameter | 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Reference Number Differentiating Characteristics | ITEM IS FAA CERTIFIED |
| 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 |
|---|---|
| BACB30LJ5-56 | 3/1 Design control — primary reference U.S. Government activity |
| BACB30LJ5-56 | 5/1 Secondary reference Howmet Global Fastening Systems Inc |
| BACB30LJ5-56 | 5/1 Secondary reference Howmet Global Fastening Systems Inc Div City of Industry Operations |
| BACB30LJ5-56 | 5/1 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| BACB30LJ5-56 | 5/1 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| BACB30LJ5-56 | 5/1 Secondary reference Federal Manufacturing Corp |
| BACB30LJ5-56 | 5/1 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
NSN 5306-01-662-2503 is a Bolt,close Tolerance, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-662-2503: Head Height: 0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM IN; Fastener Length: 3.954 INCHES NOMINAL IN; Surface Treatment Document and Classification: AMS-QQ-P-416, TYPE II, CLASS2 ASSN STD SINGLE TREATMENT RESPONSE AND BPS-F-69 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.454 INCHES NOMINAL IN. 17 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.