The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-661-9601, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-661-9601 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.164 INCHES NOMINAL IN |
| Fastener Length | 1.366 INCHES MINIMUM AND 1.369 INCHES MAXIMUM IN |
| Thread Length | 0.241 INCHES MINIMUM AND 0.244 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.125 INCHES NOMINAL IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| 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 |
|---|---|
| BACB30LT4-18 | 5/1 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| BACB30LT4-18 | 3/1 Design control — primary reference U.S. Government activity |
| BACB30LT4-18 | 5/1 Secondary reference Howmet Global Fastening Systems Inc Div City of Industry Operations |
| BACB30LT4-18 | 5/1 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| BACB30LT4-18 | 5/1 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
NSN 5306-01-661-9601 is a Bolt,close Tolerance, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-661-9601: Head Height: 0.164 INCHES NOMINAL IN; Fastener Length: 1.366 INCHES MINIMUM AND 1.369 INCHES MAXIMUM IN; Thread Length: 0.241 INCHES MINIMUM AND 0.244 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.250 INCHES IN. 12 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.