The Flange,companion, cataloged under National Stock Number 4410-01-183-2180, is classified within Federal Supply Class 4410 (Industrial Boilers) of the Furnace, Steam, Drying, Nuclear Reactors group. The manufacturer of record is Clyde Bergemann Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Flange,companion |
| FSC / FSG | 4410 — Industrial Boilers (FSG 44) |
| Manufacturers | Clyde Bergemann Inc (CAGE 1HRU7) |
| Parameter | Value |
|---|---|
| NSN | 4410-01-183-2180 |
| Primary Part Number | 271987 |
| Item Name | Flange,companion |
| FSC / FSG | 4410 / 44 — Industrial Boilers |
| Manufacturer | Clyde Bergemann Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 271987 PRIMARY | Clyde Bergemann Inc (USA) |
| Reference | Meaning |
|---|---|
| X-92739 PIECE 24 | 5/9 Secondary reference U.S. Government activity |
| 271987 | 5/9 Secondary reference U.S. Government activity |
| 82187 | 5/9 Secondary reference U.S. Government activity |
| X-92739 | 5/9 Secondary reference U.S. Government activity |
NSN 4410-01-183-2180 is a Flange,companion, manufactured by Clyde Bergemann Inc, classified under FSC 4410, Industrial Boilers. Status: active.
NSN 4410-01-183-2180 has 1 manufacturer part number on file: 271987 (Clyde Bergemann Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4720-01-183-9150, 4820-01-185-8079. Verify interchangeability with system specifications before substitution.
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.