The Impeller,pump,centrifugal, cataloged under National Stock Number 2930-00-447-3973, is classified within Federal Supply Class 2930 (Engine Cooling System Components, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Brinkley Technology Group Llc Dba Hercules Manufacturing. Government technical data includes 18 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2930-00-447-3973 |
| Primary Part Number | 18165A |
| Item Name | Impeller,pump,centrifugal |
| FSC / FSG | 2930 / 29 — Engine Cooling System Components, Nonaircraft |
| Manufacturer | Brinkley Technology Group Llc Dba Hercules Manufacturing |
| Status | ACTIVE |
| Keyway Type | WOODRUFF |
| Keyway Depth | 0.740 INCHES MINIMUM AND 0.840 INCHES MAXIMUM IN |
| FSC Application Data | PUMP,WATER,ENGINE,EXCEPT AIRCRAFT AND GUIDED MISSILE PRIME MOVING |
| Hub Bore Diameter | 0.750 INCHES MINIMUM AND 0.751 INCHES MAXIMUM IN |
| Hub Length | 0.938 INCHES NOMINAL IN |
| Design Type | SINGLE WIDTH |
| Overall Diameter | 3.740 INCHES MINIMUM AND 3.750 INCHES MAXIMUM IN |
| Mounting Method | KEY |
| Keyway Quantity | 1 |
| Hub Projection Length Beyond Wheel Side | 0.156 INCHES NOMINAL IN |
| Blade Quantity | 9 |
| Keyway Length | 0.938 INCHES NOMINAL IN |
| Hub Quantity | 1 |
| Hub Location | SINGLE INSIDE OFFSET |
| Keyway Width | 0.155 INCHES MINIMUM AND 0.157 INCHES MAXIMUM IN |
| Material | COPPER ALLOY |
| Rotation Direction for Which Designed | CLOCKWISE |
| Blade Type | STRAIGHT |
| 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 |
|---|---|
| 18165A PRIMARY | Brinkley Technology Group Llc Dba Hercules Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| 18165A | 5/9 Secondary reference Hercules Engine Co Inc |
NSN 2930-00-447-3973 is a Impeller,pump,centrifugal, manufactured by Brinkley Technology Group Llc Dba Hercules Manufacturing, classified under FSC 2930, Engine Cooling System Components, Nonaircraft. Status: active.
NSN 2930-00-447-3973 has 1 manufacturer part number on file: 18165A (Brinkley Technology Group Llc Dba Hercules Manufacturing).
1 possible match (shared part number, not a government interchangeability claim): 6750-01-427-1964. Verify interchangeability with system specifications before substitution.
Key specifications for 18165A: Keyway Type: WOODRUFF; Keyway Depth: 0.740 INCHES MINIMUM AND 0.840 INCHES MAXIMUM IN; FSC Application Data: PUMP,WATER,ENGINE,EXCEPT AIRCRAFT AND GUIDED MISSILE PRIME MOVING; Hub Bore Diameter: 0.750 INCHES MINIMUM AND 0.751 INCHES MAXIMUM IN. 18 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.