The Bolt,machine, cataloged under National Stock Number 5306-00-133-1948, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-133-1948 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Extended Washer Thickness | 0.030 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN |
| Head Height | 0.240 INCHES MAXIMUM IN |
| Fastener Length | 0.688 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN |
| Thread Length | 0.531 INCHES MINIMUM IN |
| Hardness Rating | 23.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.367 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 3130 OR STEEL COMP 8630 OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| S53-13 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5306-00-133-1948 is a Bolt,machine, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-133-1948: Extended Washer Thickness: 0.030 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN; Head Height: 0.240 INCHES MAXIMUM IN; Fastener Length: 0.688 INCHES NOMINAL IN; Extended Washer Diameter: 0.480 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN. 16 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.