The Actuator,electro-Mechanical,line, cataloged under National Stock Number 4810-01-550-0770, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Woodward, Inc.. Government technical data includes 3 specifications, 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4810-01-550-0770 |
| Primary Part Number | A 8251-771 |
| Item Name | Actuator,electro-Mechanical,line |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Woodward, Inc. |
| Status | ACTIVE |
| Terminal Type | CONNECTOR |
| Supplementary Features | CAST-IRON CASE; EQUIPPED WITH A GEROTOR PUMP, 3161 GOVERNOR TYPE; THE PUMP USES OIL FROM THE SELF-CONTAINED UG-ACTUATOR SUMP TO PROVIDE 1172 KPA, 170 PSI, INTERNAL OPERATING PRESSURE; THE PUMP OPERATES IN ONE DIRECTION ONLY; THE DRIVE USES A MAX OF 375 W, 0.5 HP; MOUNTING HOLE DIMENSIONS OF 82.7-83.2 MM; CONNECT THE RETURN LINE TO THE 0.250-28 NPTF PORT IN THE TOP COVER; DESIGNED TO GIVE STABLE OPERATION WITH MOST OILS, IF THE FLUID VISCOSITY AT THE OPERATING TEMPERATURE IS WITHIN A 50 TO 3000 SUS, SAYBOLT UNIVERSAL SECONDS, RANGE; ELECTRICAL CONNECTION 3-PIN, MS-3102E-14S-7P, PLUG CONNECTOR W |
| Unpackaged Unit Weight | 16.0 KILOGRAMS KG |
| 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 |
|---|---|
| A 8251-771 PRIMARY | Woodward, Inc. (USA) |
NSN 4810-01-550-0770 is a Actuator,electro-Mechanical,line, manufactured by Woodward, Inc., classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-01-550-0770 has 1 manufacturer part number on file: A 8251-771 (Woodward, Inc.).
Key specifications for A 8251-771: Terminal Type: CONNECTOR; Supplementary Features: CAST-IRON CASE; EQUIPPED WITH A GEROTOR PUMP, 3161 GOVERNOR TYPE; THE PUMP USES OIL FROM THE SELF-CONTAINED UG-ACTUATOR SUMP TO PROVIDE 1172 KPA, 170 PSI, INTERNAL OPERATING PRESSURE; THE PUMP OPERATES IN ONE DIRECTION ONLY; THE DRIVE USES A MAX OF 375 W, 0.5 HP; MOUNTING HOLE DIMENSIONS OF 82.7-83.2 MM; CONNECT THE RETURN LINE TO THE 0.250-28 NPTF PORT IN THE TOP COVER; DESIGNED TO GIVE STABLE OPERATION WITH MOST OILS, IF THE FLUID VISCOSITY AT THE OPERATING TEMPERATURE IS WITHIN A 50 TO 3000 SUS, SAYBOLT UNIVERSAL SECONDS, RANGE; ELECTRICAL CONNECTION 3-PIN, MS-3102E-14S-7P, PLUG CONNECTOR W; Special Features: A PROPORTIONAL ELECTRO-HYDRAULIC ACTUATOR; PROVIDES A 20 TO 160 MA POSITION SIGNAL; DESIGNED FOR USE WITH WOODWARD 2301, 400, 43027, 500-SERIES AND 70-SERIES CONTROLS; ROTARY OUTPUT ACTUATOR HAS 42 DEGREES OF TERMINAL, OUTPUT, SHAFT TRAVEL; RECOMMENDED TRAVEL FROM THE NO-LOAD TO THE FULL-LOAD POSITION IS 2/3 OF FULL ACTUATOR TRAVEL; USED ON DIESEL, GAS AND GASOLINE ENGINES, ALSO STEAM AND INDUSTRIAL GAS TURBINES; MAX WORK CAPACITY OF 19.4 J IN THEINCREASE DIRECTION AND 23.3 J IN THE DECREASE DIRECTION; THE UG-ACTURATOR OUTPUT IS DIRECTLY PROPORTIONAL TO A 20 TO 160 MA SIGNAL FROM AN ELECTRONIC CONTROL SYSTEM; 0.500-36 SERRATED TERMINAL SHAFT; Part Name Assigned by Controlling Agency: UG-ACTUATOR. 3 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.