The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-259-1172, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Bae Systems Controls Inc. Government technical data includes 24 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-259-1172 |
| Primary Part Number | 438223-18 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Bae Systems Controls Inc |
| Status | ACTIVE |
| Width Across Flats | 4.0 MILLIMETERS NOMINAL MM |
| Head Height | 5.0 MILLIMETERS NOMINAL MM |
| External Thread Tolerance Class | 4G6G |
| Point Length | 1.6 MILLIMETERS NOMINAL MM |
| Fastener Length | 50.0 MILLIMETERS NOMINAL MM |
| Thread Pitch in Millimeters | 0.80 |
| Thread Length | 14.0 MILLIMETERS NOMINAL MM |
| Point Chamfer Angle | 90.0 DEGREES NOMINAL |
| First Diameter From Head | 3.8 MILLIMETERS NOMINAL MM |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 50.0 MILLIMETERS NOMINAL MM |
| Nominal Thread Diameter | 5.0 MILLIMETERS MM |
| Head Style | PAN NO. 2 |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 5.0 MILLIMETERS NOMINAL MM |
| Point Style | FLAT |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 36.0 MILLIMETERS NOMINAL MM |
| Nonstandard Thread Pitch Diameter | +4.4200 TO 4.4800 INCHES IN |
| Externally Relieved Body Diameter Quantity | 2 |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | ISO S |
| Head Diameter | 9.0 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| 438223-18 PRIMARY | Bae Systems Controls Inc (USA) |
NSN 5305-01-259-1172 is a Screw,externally Relieved Body, manufactured by Bae Systems Controls Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-259-1172 has 1 manufacturer part number on file: 438223-18 (Bae Systems Controls Inc).
Key specifications for 438223-18: Width Across Flats: 4.0 MILLIMETERS NOMINAL MM; Head Height: 5.0 MILLIMETERS NOMINAL MM; External Thread Tolerance Class: 4G6G; Point Length: 1.6 MILLIMETERS NOMINAL MM. 24 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.