The Bolt,machine, cataloged under National Stock Number 5306-01-037-4173, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-037-4173 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Extended Washer Thickness | 0.484 INCHES NOMINAL IN |
| Head Height | 1.250 INCHES MAXIMUM IN |
| Fastener Length | 2.969 INCHES MINIMUM AND 3.031 INCHES MAXIMUM IN |
| Extended Washer Diameter | 1.870 INCHES MAXIMUM IN |
| Thread Length | 2.802 INCHES MINIMUM AND 3.031 INCHES MAXIMUM IN |
| Hardness Rating | 37.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Hole Configuration Style | DOUBLE HEXAGON FLATS |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 1.250 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | DOUBLE HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.254 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 170000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 4140 OVERALL |
| Hole Quantity | 1 |
| Thread Series Designator | UNF |
| Hole Type | DRILLED |
| Hole Diameter | 0.100 INCHES NOMINAL IN |
| 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 |
|---|---|
| 1002888-01 | 5/9 Secondary reference Raytheon Technical Services Company |
| 1002888-01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-037-4173 is a Bolt,machine, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-037-4173: Extended Washer Thickness: 0.484 INCHES NOMINAL IN; Head Height: 1.250 INCHES MAXIMUM IN; Fastener Length: 2.969 INCHES MINIMUM AND 3.031 INCHES MAXIMUM IN; Extended Washer Diameter: 1.870 INCHES MAXIMUM IN. 21 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.