The Contact,electrical, cataloged under National Stock Number 5999-01-223-8985, is classified within Federal Supply Class 5999 (Miscellaneous Electrical and Electronic Components) of the Electrical and Electronic Equipment Components group. The manufacturer of record is The Boeing Company. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Item Name | Contact,electrical |
| FSC / FSG | 5999 — Miscellaneous Electrical and Electronic Components (FSG 59) |
| Manufacturers | The Boeing Company (CAGE 18355) |
| Parameter | Value |
|---|---|
| NSN | 5999-01-223-8985 |
| Primary Part Number | ST421-20B |
| Item Name | Contact,electrical |
| FSC / FSG | 5999 / 59 — Miscellaneous Electrical and Electronic Components |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Shelf Life Code | 0 |
| Unit of Issue | EA |
| Acquisition advice code | J |
| Part Number | Manufacturer |
|---|---|
| ST421-20B PRIMARY | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| ST421-20B | 5/9 Secondary reference Mcdonnell Douglas Corp Mcdonnell Douglas Aerospace Defense and Electronics Systems |
| ST421-20B | 5/1 Secondary reference Drs Network & Imaging Systems Llc |
NSN 5999-01-223-8985 is a Contact,electrical, manufactured by The Boeing Company, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
NSN 5999-01-223-8985 has 1 manufacturer part number on file: ST421-20B (The Boeing Company).
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5999-01-223-8985 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
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.