The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-237-9931, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-237-9931 |
| Primary Part Number | 4053554 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Fastener Length | 0.385 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN |
| Thread Length | 0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN |
| Material Document and Classification | AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.142 INCHES MINIMUM AND 0.146 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.065 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Internal Drive Style | SLOT |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.472 INCHES MINIMUM AND 0.478 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 | F |
NSN 5305-01-237-9931 is a Screw,externally Relieved Body, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-237-9931 has 2 manufacturer part numbers on file: 4053554 (M.s. Aerospace Inc. Dba Ms Aerospace Inc), 4053554 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 4053554: Fastener Length: 0.385 INCHES MINIMUM AND 0.395 INCHES MAXIMUM IN; Thread Length: 0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN; Material Document and Classification: AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; First Diameter From Head: 0.142 INCHES MINIMUM AND 0.146 INCHES MAXIMUM IN. 16 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.