The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-187-1897, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Millipart, Inc. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-187-1897 |
| Primary Part Number | 247283 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Millipart, Inc |
| Status | ACTIVE |
| Width Across Flats | 0.094 INCHES NOMINAL IN |
| Head Height | 0.110 INCHES NOMINAL IN |
| Fastener Length | 0.380 INCHES NOMINAL IN |
| Thread Length | 0.150 INCHES NOMINAL IN |
| First Diameter From Head | 0.080 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.230 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 40 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.179 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 |
|---|---|
| 247283 | Millipart, Inc (USA) |
| Reference | Meaning |
|---|---|
| 247283 | 3/9 Design control — primary reference Lockheed Martin Corp Electronics and Missiles Div |
NSN 5305-01-187-1897 is a Screw,externally Relieved Body, manufactured by Millipart, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-187-1897 has 1 manufacturer part number on file: 247283 (Millipart, Inc).
Key specifications for 247283: Width Across Flats: 0.094 INCHES NOMINAL IN; Head Height: 0.110 INCHES NOMINAL IN; Fastener Length: 0.380 INCHES NOMINAL IN; Thread Length: 0.150 INCHES NOMINAL IN. 17 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.