The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-088-5253, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Marathonnorco Aerospace, Inc.. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-088-5253 |
| Primary Part Number | 63C0250-04 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Marathonnorco Aerospace, Inc. |
| Status | ACTIVE |
| Width Across Flats | 0.188 INCHES NOMINAL IN |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 1.000 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.900 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.375 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 63C0250-04 PRIMARY | Marathonnorco Aerospace, Inc. (USA) |
| A1407-4 ITEM 28 | Marathonnorco Aerospace, Inc. (USA) |
NSN 5305-01-088-5253 is a Screw,cap,socket Head, manufactured by Marathonnorco Aerospace, Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-088-5253 has 2 manufacturer part numbers on file: 63C0250-04 (Marathonnorco Aerospace, Inc.), A1407-4 ITEM 28 (Marathonnorco Aerospace, Inc.).
Key specifications for 63C0250-04: Width Across Flats: 0.188 INCHES NOMINAL IN; Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 1.000 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 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.