The Switch Assembly, cataloged under National Stock Number 5930-01-166-2257, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Telemechanics Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5930-01-166-2257 |
| Primary Part Number | 420181 |
| Item Name | Switch Assembly |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 420181 PRIMARY | Telemechanics Inc (USA) |
| Reference | Meaning |
|---|---|
| 420181 | 5/9 Secondary reference American Telephone and Telegraph Co |
NSN 5930-01-166-2257 is a Switch Assembly, manufactured by Telemechanics Inc, classified under FSC 5930, Switches. Status: active.
NSN 5930-01-166-2257 has 1 manufacturer part number on file: 420181 (Telemechanics Inc).
1 possible match (shared part number, not a government interchangeability claim): 6515-01-645-1027. Verify interchangeability with system specifications before substitution.
Key specifications for 420181: Special Features: PLASTIC,WHITE,WITH SPRING,OVERALL LENGTH 0.593; Part Name Assigned by Controlling Agency: KEYBUTTON; End Item Identification: ARTS2E. 0 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.