The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-409-2156, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-409-2156 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Width Across Flats | 0.094 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN |
| Head Height | 0.108 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN |
| Fastener Length | 0.345 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.295 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Hardness Rating | 80.0 ROCKWELL B MINIMUM OVERALL |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS1352 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Locking Feature | PELLET THREADS |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 80000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 30000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 40 |
| Material | STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 OR STEEL COMP 305 OR STEEL COMP 316 OVERALL |
| Thread Series Designator | UNRC |
| Head Diameter | 0.176 INCHES MINIMUM AND 0.183 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 | X |
| Reference | Meaning |
|---|---|
| TN1352C04LN6 | 5/9 Secondary reference Torkon Fastener Corp |
| FF-S-86 | 4/1 Identification reference U.S. Government activity |
| NAS1352C04LN6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-00-409-2156 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5305-00-460-3448. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-00-409-2156: Width Across Flats: 0.094 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN; Head Height: 0.108 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN; Fastener Length: 0.345 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 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.