The Screw,shoulder, cataloged under National Stock Number 5305-00-138-9891, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-00-138-9891 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.049 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN |
| Fastener Length | 0.158 INCHES MINIMUM AND 0.167 INCHES MAXIMUM IN |
| Shoulder Length | 0.023 INCHES MINIMUM AND 0.027 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | B190000120 FSCM 36381 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.153 INCHES MINIMUM AND 0.155 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.098 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | ASTM A582,COND A ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 40 |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.200 INCHES MINIMUM AND 0.220 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 |
| Reference | Meaning |
|---|---|
| B320001880-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-00-138-9891 is a Screw,shoulder, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-138-9891: Head Height: 0.049 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN; Fastener Length: 0.158 INCHES MINIMUM AND 0.167 INCHES MAXIMUM IN; Shoulder Length: 0.023 INCHES MINIMUM AND 0.027 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: B190000120 FSCM 36381 MFR REF SINGLE TREATMENT RESPONSE OVERALL. 18 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.