The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-021-0615, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Itt Marlow a Unit of Itt Pumps and Compressors Div. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-021-0615 |
| Primary Part Number | 25901-00 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Itt Marlow a Unit of Itt Pumps and Compressors Div |
| Status | ACTIVE |
| Head Height | 0.203 INCHES NOMINAL IN |
| Fastener Length | 0.875 INCHES NOMINAL IN |
| Thread Length | 0.750 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.500 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 25901-00 PRIMARY | Itt Marlow a Unit of Itt Pumps and Compressors Div (USA) |
| Reference | Meaning |
|---|---|
| 13220E5173-5 | 1/2 Source control — Government-approved source U.S. Government activity |
| 13220E5173-5 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-021-0615 is a Screw,cap,hexagon Head, manufactured by Itt Marlow a Unit of Itt Pumps and Compressors Div, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-021-0615 has 1 manufacturer part number on file: 25901-00 (Itt Marlow a Unit of Itt Pumps and Compressors Div).
Key specifications for 25901-00: Head Height: 0.203 INCHES NOMINAL IN; Fastener Length: 0.875 INCHES NOMINAL IN; Thread Length: 0.750 INCHES NOMINAL IN; Nominal Thread Diameter: 0.312 INCHES IN. 11 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.