The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-662-5540, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-662-5540 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.350 INCHES NOMINAL IN |
| Fastener Length | 2.3326 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | BMS10-85, TYPE I, CLASS A MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.637 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.141 INCHES NOMINAL OVERALL IN |
| Material Document and Classification | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.6250 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.6956 INCHES NOMINAL IN |
| Width Between Flats | 0.928 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN |
| Grip Diameter | 0.623 INCHES MINIMUM AND 0.624 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.1296 INCHES NOMINAL OVERALL IN |
| 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 |
|---|---|
| BACB30LT10DK27 | 5/1 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| BACB30LT10DK27 | 5/1 Secondary reference Howmet Global Fastening Systems Inc Div City of Industry Operations |
| BACB30LT10DK27 | 5/1 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| BACB30LT10DK27 | 3/1 Design control — primary reference U.S. Government activity |
| BACB30LT10DK27 | 5/1 Secondary reference Federal Manufacturing Corp |
NSN 5306-01-662-5540 is a Bolt,close Tolerance, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-662-5540: Head Height: 0.350 INCHES NOMINAL IN; Fastener Length: 2.3326 INCHES NOMINAL IN; Surface Treatment Document and Classification: BMS10-85, TYPE I, CLASS A MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.637 INCHES NOMINAL IN. 18 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.