The Bolt,machine, cataloged under National Stock Number 5306-01-225-6307, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Nylok Llc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-225-6307 |
| Primary Part Number | NM142HS420N40C |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Nylok Llc |
| Status | ACTIVE |
| Extended Washer Thickness | 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN |
| Head Height | 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Fastener Length | 2.469 INCHES MINIMUM AND 2.531 INCHES MAXIMUM IN |
| Extended Washer Diameter | 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Thread Length | 1.000 INCHES MINIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C NOMINAL AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Criticality Code Justification | FEAT |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | DOUBLE HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.243 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN |
| Locking Feature | PELLET THREADS |
| Surface Treatment | CADMIUM OVERALL |
| 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 | Y |
| Part Number | Manufacturer |
|---|---|
| NM142HS420N40C PRIMARY | Nylok Llc (USA) |
| Reference | Meaning |
|---|---|
| M69HS420-40C | 5/9 Secondary reference Nylok Llc |
NSN 5306-01-225-6307 is a Bolt,machine, manufactured by Nylok Llc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-225-6307 has 1 manufacturer part number on file: NM142HS420N40C (Nylok Llc).
Key specifications for NM142HS420N40C: Extended Washer Thickness: 0.052 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN; Head Height: 0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Fastener Length: 2.469 INCHES MINIMUM AND 2.531 INCHES MAXIMUM IN; Extended Washer Diameter: 0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM 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.