The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-667-1857, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Heroux-Devtek Inc. Government technical data includes 21 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-667-1857 |
| Primary Part Number | NAS1351N08H6 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Heroux-Devtek Inc |
| Status | ACTIVE |
| Width Across Flats | 0.141 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN |
| Head Height | 0.159 INCHES MINIMUM AND 0.164 INCHES MAXIMUM IN |
| Fastener Length | 0.345 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Thread Length | 0.289 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Hardness Rating | 33.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM OVERALL |
| Hole Configuration Style | ROUND INTERNAL HEXAGON |
| Material Document and Classification | AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS51351 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 36 |
| Material | IRON ALLOY 660 OVERALL |
| Hole Quantity | 6 |
| Thread Series Designator | UNRF |
| Hole Type | DRILLED |
| Hole Diameter | 0.044 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN |
| Head Diameter | 0.262 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | V |
| Part Number | Manufacturer |
|---|---|
| NAS1351N08H6 | Heroux-Devtek Inc (CAN) |
| Reference | Meaning |
|---|---|
| NAS1351N08H6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-667-1857 is a Screw,cap,socket Head, manufactured by Heroux-Devtek Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-667-1857 has 1 manufacturer part number on file: NAS1351N08H6 (Heroux-Devtek Inc).
Key specifications for NAS1351N08H6: Width Across Flats: 0.141 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN; Head Height: 0.159 INCHES MINIMUM AND 0.164 INCHES MAXIMUM IN; Fastener Length: 0.345 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Thread Length: 0.289 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN. 21 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.