The Screw,shoulder, cataloged under National Stock Number 5305-01-190-9643, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-190-9643 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.7900 INCHES NOMINAL IN |
| Fastener Length | 5.260 INCHES NOMINAL IN |
| Shoulder Length | 3.525 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 1.238 INCHES MINIMUM AND 1.240 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 1.730 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | QQ-N-285,CL A,ANNEALED AH FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 1.000 INCHES IN |
| Head Style | ROUND W/WRENCH FLATS |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.7500 INCHES NOMINAL IN |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 8 |
| Material | NICKEL ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 2.0000 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 |
| Reference | Meaning |
|---|---|
| 515-4674116 ITEM 13 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-190-9643 is a Screw,shoulder, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-190-9643: Head Height: 0.7900 INCHES NOMINAL IN; Fastener Length: 5.260 INCHES NOMINAL IN; Shoulder Length: 3.525 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 1.238 INCHES MINIMUM AND 1.240 INCHES MAXIMUM FIRST SHOULDER 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.