The Bolt,internal Wrenching, cataloged under National Stock Number 5306-01-348-2652, 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20 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-348-2652 |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Width Across Flats | 0.1562 INCHES MINIMUM AND 0.1587 INCHES MAXIMUM IN |
| Head Height | 0.185 INCHES NOMINAL IN |
| Fastener Length | 3.750 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.429 INCHES MINIMUM AND 0.449 INCHES MAXIMUM IN |
| Material Document and Classification | AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.164 INCHES MINIMUM AND 0.169 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 3.311 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 140000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.308 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 |
|---|---|
| 221B1408P0001 | 3/9 Design control — primary reference U.S. Government activity |
| 221B1408P1 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-348-2652 is a Bolt,internal Wrenching, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-348-2652: Width Across Flats: 0.1562 INCHES MINIMUM AND 0.1587 INCHES MAXIMUM IN; Head Height: 0.185 INCHES NOMINAL IN; Fastener Length: 3.750 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 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.