The Contact Assembly,electrical, cataloged under National Stock Number 5999-01-593-0830, 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 Siemens Energy and Automation Inc Siemens Furnas Controls Div. Government technical data includes 1 specification, 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5999-01-593-0830 |
| Primary Part Number | 3RH1921-1DA11 |
| Item Name | Contact Assembly,electrical |
| FSC / FSG | 5999 / 59 — Miscellaneous Electrical and Electronic Components |
| Manufacturer | Siemens Energy and Automation Inc Siemens Furnas Controls Div |
| Status | ACTIVE |
| Terminal Type | SCREW |
| 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 | 0.1500 lbs |
| Cube | 0.0226 cu ft |
| Part Number | Manufacturer |
|---|---|
| 3RH1921-1DA11 PRIMARY | Siemens Energy and Automation Inc Siemens Furnas Controls Div (USA) |
NSN 5999-01-593-0830 is a Contact Assembly,electrical, manufactured by Siemens Energy and Automation Inc Siemens Furnas Controls Div, classified under FSC 5999, Miscellaneous Electrical and Electronic Components. Status: active.
NSN 5999-01-593-0830 has 1 manufacturer part number on file: 3RH1921-1DA11 (Siemens Energy and Automation Inc Siemens Furnas Controls Div).
1 possible match (shared part number, not a government interchangeability claim): 5999-01-665-0890. Verify interchangeability with system specifications before substitution.
Key specifications for 3RH1921-1DA11: Terminal Type: SCREW; Special Features: THIS IS A TWO POLE SWITCH BLOCK.; Part Name Assigned by Controlling Agency: LATERALLY MOUNTABLE AUXILLARY SWITCH BLOCK. 1 specification is 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.