The Bolt,machine, cataloged under National Stock Number 5306-01-325-1326, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Qualified Fasteners Inc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-325-1326 |
| Primary Part Number | 626140-444 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Qualified Fasteners Inc |
| Status | ACTIVE |
| Extended Washer Thickness | 0.353 INCHES NOMINAL IN |
| Head Height | 0.875 INCHES NOMINAL IN |
| Fastener Length | 5.500 INCHES NOMINAL IN |
| Thread Length | 2.766 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.875 INCHES IN |
| Head Style | DOUBLE HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.868 INCHES MINIMUM AND 0.979 INCHES MAXIMUM IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 9 |
| Material | STEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8640 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 626140-444 | Qualified Fasteners Inc (USA) |
| Reference | Meaning |
|---|---|
| 626140-444 | 3/2 Design control — primary reference U.S. Government activity |
| 625175-3 | 5/9 Secondary reference U.S. Government activity |
| 625179-3 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-325-1326 is a Bolt,machine, manufactured by Qualified Fasteners Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-325-1326 has 1 manufacturer part number on file: 626140-444 (Qualified Fasteners Inc).
Key specifications for 626140-444: Extended Washer Thickness: 0.353 INCHES NOMINAL IN; Head Height: 0.875 INCHES NOMINAL IN; Fastener Length: 5.500 INCHES NOMINAL IN; Thread Length: 2.766 INCHES NOMINAL 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.