The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-052-5808, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is R and S Machine Co. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-052-5808 |
| Primary Part Number | 430R298H01 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | R and S Machine Co |
| Status | ACTIVE |
| Head Height | 0.058 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN |
| Fastener Length | 0.418 INCHES MINIMUM AND 0.422 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.258 INCHES MINIMUM AND 0.262 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-764 COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.306 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.160 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.555 INCHES MINIMUM AND 0.565 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 |
| Part Number | Manufacturer |
|---|---|
| 430R298H01 | R and S Machine Co (USA) |
| Reference | Meaning |
|---|---|
| 430R298H01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-052-5808 is a Screw,externally Relieved Body, manufactured by R and S Machine Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-052-5808 has 1 manufacturer part number on file: 430R298H01 (R and S Machine Co).
Key specifications for 430R298H01: Head Height: 0.058 INCHES MINIMUM AND 0.062 INCHES MAXIMUM IN; Fastener Length: 0.418 INCHES MINIMUM AND 0.422 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.258 INCHES MINIMUM AND 0.262 INCHES MAXIMUM IN. 18 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.