The Screw,shoulder, cataloged under National Stock Number 5305-00-448-3790, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Telemechanics Inc. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-448-3790 |
| Primary Part Number | 74020 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| Head Height | 0.094 INCHES NOMINAL IN |
| Fastener Length | 0.531 INCHES NOMINAL IN |
| Shoulder Length | 0.125 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.280 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 0.406 INCHES MINIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Features Provided | CASEHARDENED |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CHROMATE HEAD |
| Surface Treatment | CHROMATE THREADS |
| Internal Drive Style | SLOT |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 40 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.406 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 |
| Part Number | Manufacturer |
|---|---|
| 74020 PRIMARY | Telemechanics Inc (USA) |
| Reference | Meaning |
|---|---|
| 74020 | 5/9 Secondary reference At and T Corp |
NSN 5305-00-448-3790 is a Screw,shoulder, manufactured by Telemechanics Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-448-3790 has 1 manufacturer part number on file: 74020 (Telemechanics Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4720-01-383-5244, 6615-01-647-6888. Verify interchangeability with system specifications before substitution.
Key specifications for 74020: Head Height: 0.094 INCHES NOMINAL IN; Fastener Length: 0.531 INCHES NOMINAL IN; Shoulder Length: 0.125 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 0.280 INCHES NOMINAL FIRST SHOULDER IN. 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.