The Bolt,machine, cataloged under National Stock Number 5306-00-352-0358, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Foss-Brown, Inc.. Government technical data includes 18 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-352-0358 |
| Primary Part Number | A51S60508-15 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Foss-Brown, Inc. |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES GRIP |
| Extended Washer Thickness | 0.250 INCHES NOMINAL IN |
| Head Height | 0.900 INCHES NOMINAL IN |
| Fastener Length | 4.000 INCHES NOMINAL IN |
| Extended Washer Diameter | 2.500 INCHES NOMINAL IN |
| Thread Length | 1.060 INCHES MINIMUM IN |
| Hardness Rating | 35.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 1.375 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.427 INCHES MINIMUM AND 1.440 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 155000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 12 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| A51S60508-15 | Foss-Brown, Inc. (USA) |
| Reference | Meaning |
|---|---|
| A51S60508-15 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51S60508-15 | 5/9 Secondary reference Winner's Circle Engineering Inc |
| A51S60508-15 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A51S60508-15 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
NSN 5306-00-352-0358 is a Bolt,machine, manufactured by Foss-Brown, Inc., classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-352-0358 has 1 manufacturer part number on file: A51S60508-15 (Foss-Brown, Inc.).
Key specifications for A51S60508-15: Surface Finish: 63.0 MICROINCHES GRIP; Extended Washer Thickness: 0.250 INCHES NOMINAL IN; Head Height: 0.900 INCHES NOMINAL IN; Fastener Length: 4.000 INCHES NOMINAL IN. 18 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.