The Bolt,machine, cataloged under National Stock Number 5306-01-144-6264, 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20 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-144-6264 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.150 INCHES MINIMUM AND 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM0.163 INCHES MAXIMUM IN |
| Fastener Length | 1.438 INCHES MINIMUM AND 1.438 INCHES MINIMUM AND 1.500 INCHES MAXIMUM1.500 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ASTM B633 TY 2 SC 3 ASSN STD SINGLE TREATMENT RESPONSE FASTENERASTM B633 TY 2 SC 3 ASSN STD SINGLE TREATMENT RESPONSE FASTENER |
| Thread Length | 0.938 INCHES MINIMUM0.938 INCHES MINIMUM IN |
| Hardness Rating | 33.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MINIMUM AND 39.0 ROCKWELL C MAXIMUM FASTENER39.0 ROCKWELL C MAXIMUM FASTENER |
| Material Document and Classification | SAE J429,GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OR SAE J429,GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A354,GRADE BD ASSN STD SINGLE MATERIAL RESPONSE FASTENERASTM A354,GRADE BD ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Nominal Thread Diameter | 0.250 INCHES0.250 INCHES IN |
| Features Provided | FINISHED HEADFINISHED HEAD |
| Head Style | HEXAGONHEXAGON |
| Thread Direction | RIGHT-HANDRIGHT-HAND |
| Width Between Flats | 0.428 INCHES MINIMUM AND 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM0.438 INCHES MAXIMUM IN |
| Locking Feature | PATCH OR PATCH OR STRIP THREADSSTRIP THREADS |
| Surface Treatment | ZINC AND ZINC AND CHROMATE FASTENERCHROMATE FASTENER |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH150000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A2A |
| Thread Quantity Per Inch | 2020 |
| Material | STEEL OVERALL |
| Material | PLASTIC POLYAMIDE NYLON LOCKING FEATURE |
| Material | STEEL FASTENER |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC)UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| MS90728-12L | 5/9 Secondary reference U.S. Government activity |
| B1821BH025C150L | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-144-6264 is a Bolt,machine, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-144-6264: Head Height: 0.150 INCHES MINIMUM AND 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM0.163 INCHES MAXIMUM IN; Fastener Length: 1.438 INCHES MINIMUM AND 1.438 INCHES MINIMUM AND 1.500 INCHES MAXIMUM1.500 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM B633 TY 2 SC 3 ASSN STD SINGLE TREATMENT RESPONSE FASTENERASTM B633 TY 2 SC 3 ASSN STD SINGLE TREATMENT RESPONSE FASTENER; Thread Length: 0.938 INCHES MINIMUM0.938 INCHES MINIMUM 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.