The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-727-2188, 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21 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-727-2188 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Fastener Length | 1.234 INCHES MINIMUM AND 1.282 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS-QQ-P-416,TYPE II,CLASS 2 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 1.234 INCHES MINIMUM AND 1.282 INCHES MAXIMUM IN |
| Hole Configuration Style | HEXAGON FLATS |
| Material Document and Classification | AMS6382 AEROSPACE MATERIAL SPEC STD 1ST MATERIAL RESPONSE OR AMS6415 AEROSPACE MATERIAL SPEC STD 2ND MATERIAL RESPONSE OR AMS6322,6325 OR 6327 AEROSPACE MATERIAL SPEC STD 3RD MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.2500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS1801 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Width Between Flats | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CRUCIFORM RIBBED |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 4140 OR STEEL COMP 4340 OR STEEL COMP 8740 OVERALL |
| Hole Quantity | 3 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.046 INCHES MINIMUM AND 0.056 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 |
|---|---|
| NAS1801-4D9 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-727-2188 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-727-2188: Head Height: 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN; Fastener Length: 1.234 INCHES MINIMUM AND 1.282 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS-QQ-P-416,TYPE II,CLASS 2 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 1.234 INCHES MINIMUM AND 1.282 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.