The Screw,cap,socket Head, cataloged under National Stock Number 5305-00-339-8991, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-339-8991 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES OVERALL |
| Head Height | 0.066 INCHES MINIMUM AND 0.083 INCHES MAXIMUM IN |
| Fastener Length | 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN |
| Thread Length | 0.146 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.086 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Locking Feature | PATCH OR STRIP THREADS |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 56 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.124 INCHES MINIMUM AND 0.140 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 |
|---|---|
| 9H811-0187 | 5/9 Secondary reference Simplex Supply Co. Inc |
| 9H811-0187 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-00-339-8991 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-339-8991: Surface Finish: 125.0 MICROINCHES OVERALL; Head Height: 0.066 INCHES MINIMUM AND 0.083 INCHES MAXIMUM IN; Fastener Length: 0.182 INCHES MINIMUM AND 0.192 INCHES MAXIMUM IN; Thread Length: 0.146 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN. 15 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.