The Bolt,internal Wrenching, cataloged under National Stock Number 5306-01-181-7472, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-181-7472 |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Width Across Flats | 0.875 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN |
| Head Height | 1.236 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Fastener Length | 3.260 INCHES NOMINAL IN |
| Thread Length | 1.620 INCHES NOMINAL IN |
| Criticality Code Justification | AHYM |
| Material Document and Classification | ASTM A193 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| First Diameter From Head | 1.069 INCHES MINIMUM AND 1.074 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 1.000 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 1.640 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Surface Treatment | COPPER OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 8 |
| Material | STEEL COMP 304 OR STEEL COMP 316 OR STEEL COMP 321 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY TAPERED THREADS |
| Head Diameter | 1.852 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 431B502-29 | 3/1 Design control — primary reference General Electric Company |
NSN 5306-01-181-7472 is a Bolt,internal Wrenching, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-181-7472: Width Across Flats: 0.875 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN; Head Height: 1.236 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN; Fastener Length: 3.260 INCHES NOMINAL IN; Thread Length: 1.620 INCHES NOMINAL IN. 20 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.