The Screw,shoulder, cataloged under National Stock Number 5305-00-080-1720, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-080-1720 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.125 INCHES NOMINAL IN |
| Fastener Length | 0.531 INCHES NOMINAL IN |
| Shoulder Length | 0.281 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.145 INCHES MINIMUM AND 0.155 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.250 INCHES MINIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.313 INCHES NOMINAL IN |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 503-8652-001 | 5/9 Secondary reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| 503-8652-001 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-00-080-1720 is a Screw,shoulder, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-080-1720: Head Height: 0.125 INCHES NOMINAL IN; Fastener Length: 0.531 INCHES NOMINAL IN; Shoulder Length: 0.281 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 0.145 INCHES MINIMUM AND 0.155 INCHES MAXIMUM FIRST SHOULDER IN. 15 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.