The Bolt,machine, cataloged under National Stock Number 5306-00-263-8948, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 17 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-263-8948 |
| Primary Part Number | 4F7721 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Head Height | 0.822 INCHES MINIMUM AND 0.866 INCHES MAXIMUM IN |
| Fastener Length | 5.750 INCHES NOMINAL IN |
| Thread Length | 1.375 INCHES MINIMUM IN |
| Hardness Rating | 30.0 ROCKWELL C NOMINAL OVERALL |
| Shank Unthreaded Hole Diameter | 0.266 INCHES NOMINAL ALL HOLES IN |
| Nominal Thread Diameter | 1.250 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 4.375 INCHES NOMINAL IN |
| Width Between Flats | 1.850 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN |
| Minimum Yield Strength | 145000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 12 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 5.375 INCHES NOMINAL ALL HOLES IN |
| 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 |
|---|---|
| 4F7721 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 5306-00-263-8948 is a Bolt,machine, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-263-8948 has 1 manufacturer part number on file: 4F7721 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 4F7721: Head Height: 0.822 INCHES MINIMUM AND 0.866 INCHES MAXIMUM IN; Fastener Length: 5.750 INCHES NOMINAL IN; Thread Length: 1.375 INCHES MINIMUM IN; Hardness Rating: 30.0 ROCKWELL C NOMINAL OVERALL. 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.