The Screw,tapping, cataloged under National Stock Number 5305-01-162-5357, 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 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-162-5357 |
| Primary Part Number | 420158 |
| Item Name | Screw,tapping |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| Nonmachine Nominal Thread Diameter | 0.125 INCHES IN |
| Extended Washer Thickness | 0.022 INCHES NOMINAL IN |
| Width Across Flats | 0.188 INCHES NOMINAL IN |
| Head Height | 0.084 INCHES NOMINAL IN |
| Fastener Length | 0.438 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.250 INCHES NOMINAL IN |
| Nonmachine Thread Style | DOG TYPE (TYPE B OR C) |
| Head Style | HEXAGON EXTENDED WASHER |
| Width Between Flats | 0.188 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | SLOT |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 420158 PRIMARY | Telemechanics Inc (USA) |
| Reference | Meaning |
|---|---|
| 420158 | 5/9 Secondary reference American Telephone and Telegraph Co |
NSN 5305-01-162-5357 is a Screw,tapping, manufactured by Telemechanics Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-162-5357 has 1 manufacturer part number on file: 420158 (Telemechanics Inc).
Key specifications for 420158: Nonmachine Nominal Thread Diameter: 0.125 INCHES IN; Extended Washer Thickness: 0.022 INCHES NOMINAL IN; Width Across Flats: 0.188 INCHES NOMINAL IN; Head Height: 0.084 INCHES NOMINAL IN. 12 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.