The Bolt,machine, cataloged under National Stock Number 5306-01-371-2850, 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16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-371-2850 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Extended Washer Thickness | 0.040 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN |
| Head Height | 0.309 INCHES MINIMUM AND 0.329 INCHES MAXIMUM IN |
| Fastener Length | 1.703 INCHES MINIMUM AND 1.733 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | BMS 10-85,TY I MFR REF SINGLE TREATMENT RESPONSE THREADS |
| Extended Washer Diameter | 0.575 INCHES MINIMUM AND 0.585 INCHES MAXIMUM IN |
| Thread Length | 0.593 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.3125 INCHES IN |
| Head Style | DOUBLE HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN |
| Width Between Flats | 0.418 INCHES MINIMUM AND 0.434 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM THREADS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| BACB30LE5K18 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-371-2850 is a Bolt,machine, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-371-2850: Extended Washer Thickness: 0.040 INCHES MINIMUM AND 0.060 INCHES MAXIMUM IN; Head Height: 0.309 INCHES MINIMUM AND 0.329 INCHES MAXIMUM IN; Fastener Length: 1.703 INCHES MINIMUM AND 1.733 INCHES MAXIMUM IN; Surface Treatment Document and Classification: BMS 10-85,TY I MFR REF SINGLE TREATMENT RESPONSE THREADS. 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.