The Bolt,machine, cataloged under National Stock Number 5306-01-391-3657, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is L a Benson Company Incorporated, the. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-391-3657 |
| Primary Part Number | 1/4-20UNC-2AX0.75LG SQ HD BOLT |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | L a Benson Company Incorporated, the |
| Status | ACTIVE |
| Head Height | 0.156 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Fastener Length | 0.750 INCHES NOMINAL IN |
| Thread Length | 0.650 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Material Document and Classification | SAE J429, GRADE 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | SQUARE |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.362 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Thread Series Designator | 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 |
| Part Number | Manufacturer |
|---|---|
| 1/4-20UNC-2AX0.75LG SQ HD BOLT PRIMARY | L a Benson Company Incorporated, the (USA) |
| Reference | Meaning |
|---|---|
| 1/4-20UNC-2A X 3/4 LG STL | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 5306-01-391-3657 is a Bolt,machine, manufactured by L a Benson Company Incorporated, the, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-391-3657 has 1 manufacturer part number on file: 1/4-20UNC-2AX0.75LG SQ HD BOLT (L a Benson Company Incorporated, the).
Key specifications for 1/4-20UNC-2AX0.75LG SQ HD BOLT: Head Height: 0.156 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN; Fastener Length: 0.750 INCHES NOMINAL IN; Thread Length: 0.650 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN; Material Document and Classification: SAE J429, GRADE 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 13 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.