The Actuator,hydraulic-Pneumatic,rot, cataloged under National Stock Number 4810-01-411-4189, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Bellofram Corporation. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4810-01-411-4189 |
| Primary Part Number | 421-981-021-000 |
| Item Name | Actuator,hydraulic-Pneumatic,rot |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Bellofram Corporation |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 421-981-021-000 PRIMARY | Bellofram Corporation (USA) |
| 2755171-21 | Honeywell International Inc Div Aerospace-South Bend (bendix Dr) (USA) |
| Reference | Meaning |
|---|---|
| 2755171 | D/9 Drawing number reference only Honeywell International Inc Div Aerospace-South Bend (bendix Dr) |
NSN 4810-01-411-4189 is a Actuator,hydraulic-Pneumatic,rot, manufactured by Bellofram Corporation, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-01-411-4189 has 2 manufacturer part numbers on file: 421-981-021-000 (Bellofram Corporation), 2755171-21 (Honeywell International Inc Div Aerospace-South Bend (bendix Dr)).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-422-4015, 4820-01-423-4446. Verify interchangeability with system specifications before substitution.
Key specifications for 421-981-021-000: Special Features: SPRING RETURN; End Item Identification: 4920-01-218-4171. 0 specifications are documented in the U.S. Government catalog.
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.