The Screw,shoulder, cataloged under National Stock Number 5305-01-705-5493, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lyn-Tron, Inc. Dba Lyn-Tron Inc. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-705-5493 |
| Primary Part Number | SS7444-01 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lyn-Tron, Inc. Dba Lyn-Tron Inc |
| Status | ACTIVE |
| Width Across Flats | 0.125 INCHES NOMINAL IN |
| Head Height | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN |
| Fastener Length | 0.937 INCHES NOMINAL IN |
| Shoulder Length | 0.6875 INCHES MINIMUM AND 0.6877 INCHES MAXIMUM OVERALL IN |
| Surface Treatment Document and Classification | ASTM-A967-05 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.2494 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM OVERALL IN |
| Thread Length | 0.203 INCHES NOMINAL IN |
| Shoulder Shape | ROUND OVERALL |
| Material Document and Classification | ASTM-A-582 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Chamfer Angle | 45.0 DEGREES NOMINAL |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.371 INCHES MINIMUM AND 0.379 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 |
|---|---|
| SS7444-01 PRIMARY | Lyn-Tron, Inc. Dba Lyn-Tron Inc (USA) |
| Reference | Meaning |
|---|---|
| SS7444 | D/9 Drawing number reference only Lyn-Tron, Inc. Dba Lyn-Tron Inc |
NSN 5305-01-705-5493 is a Screw,shoulder, manufactured by Lyn-Tron, Inc. Dba Lyn-Tron Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-705-5493 has 1 manufacturer part number on file: SS7444-01 (Lyn-Tron, Inc. Dba Lyn-Tron Inc).
Key specifications for SS7444-01: Width Across Flats: 0.125 INCHES NOMINAL IN; Head Height: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN; Fastener Length: 0.937 INCHES NOMINAL IN; Shoulder Length: 0.6875 INCHES MINIMUM AND 0.6877 INCHES MAXIMUM OVERALL IN. 20 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.