The Contact,electrical, cataloged under National Stock Number 5999-01-277-0779, 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 Department of the Army Hq United States Army Communications Research and Development Command. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5999-01-277-0779 |
| Primary Part Number | B4021701 |
| Item Name | Contact,electrical |
| FSC / FSG | 5999 / 59 — Miscellaneous Electrical and Electronic Components |
| Manufacturer | Department of the Army Hq United States Army Communications Research and Development Command |
| Status | ACTIVE |
| Mounting Method | FORCE FIT |
| Material | COPPER ALLOY BODY AND CONTACT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Shelf Life Code | 0 |
| Criticality Code | X |
| Unit of Issue | EA |
| Acquisition advice code | JN |
| Weight | 0.0150 lbs |
| Cube | 0.0022 cu ft |
| Part Number | Manufacturer |
|---|---|
| L200 015 645 | Lockheed Martin Librascope Corporation (USA) |
| B4021701 PRIMARY | Department of the Army Hq United States Army Communications Research and Development Command (USA) |
| Reference | Meaning |
|---|---|
| MSC-196-236-100SN200 | 5/9 Secondary reference Berg Electronics Inc Mckenzie Socket Technology Div |
NSN 5999-01-277-0779 is a Contact,electrical, manufactured by Department of the Army Hq United States Army Communications Research and Development Command, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
NSN 5999-01-277-0779 has 2 manufacturer part numbers on file: L200 015 645 (Lockheed Martin Librascope Corporation), B4021701 (Department of the Army Hq United States Army Communications Research and Development Command).
Key specifications for B4021701: Overall Height: 0.055 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN; Mounting Method: FORCE FIT; Overall Length: 0.191 INCHES MINIMUM AND 0.201 INCHES MAXIMUM IN; Overall Width: 0.155 INCHES MINIMUM AND 0.170 INCHES MAXIMUM IN. 2 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.