The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-00-033-4887, 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15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-00-033-4887 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN |
| Fastener Length | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Thread Length | 0.452 INCHES MINIMUM AND 0.552 INCHES MAXIMUM IN |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Criticality Code Justification | FEAT |
| Material Document and Classification | AMS 5616 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.438 INCHES NOMINAL IN |
| Nonstandard Thread Pitch Diameter | +0.2216 TO 0.2238 INCHES IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Quantity Per Inch | 20 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNF |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 231648 | 3/2 Design control — primary reference U.S. Government activity |
| 231648 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
NSN 5305-00-033-4887 is a Screw,cap,hexagon Head, classified under FSC 5305, Screws. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5985-01-333-4302. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-00-033-4887: Head Height: 0.146 INCHES MINIMUM AND 0.166 INCHES MAXIMUM IN; Fastener Length: 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN; Thread Length: 0.452 INCHES MINIMUM AND 0.552 INCHES MAXIMUM IN; Hardness Rating: 30.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM 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.