The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-613-5220, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Promptus Electonic Hardware Inc. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-613-5220 |
| Primary Part Number | 189-06-SS-1/4-28 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Promptus Electonic Hardware Inc |
| Status | ACTIVE |
| Head Height | 0.5625 INCHES NOMINAL IN |
| Fastener Length | 0.9375 INCHES NOMINAL IN |
| Thread Length | 0.3125 INCHES NOMINAL IN |
| Material Document and Classification | QQ-S-764 COND A (303) FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | KNURLED NO. 1 |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.4375 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.500 INCHES MINIMUM AND 0.515 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 |
|---|---|
| 189-06-SS-1/4-28 PRIMARY | Promptus Electonic Hardware Inc (USA) |
| Reference | Meaning |
|---|---|
| 7517E89 FIND 14 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-613-5220 is a Screw,externally Relieved Body, manufactured by Promptus Electonic Hardware Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-613-5220 has 1 manufacturer part number on file: 189-06-SS-1/4-28 (Promptus Electonic Hardware Inc).
Key specifications for 189-06-SS-1/4-28: Head Height: 0.5625 INCHES NOMINAL IN; Fastener Length: 0.9375 INCHES NOMINAL IN; Thread Length: 0.3125 INCHES NOMINAL IN; Material Document and Classification: QQ-S-764 COND A (303) FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.