The Piston,fuel Pump, cataloged under National Stock Number 2915-00-786-0657, is classified within Federal Supply Class 2915 (Engine Fuel System Components, Aircraft and Missile Prime Movers) of the Engine Accessories group. The manufacturer of record is Triumph Engine Control Systems Llc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 2915-00-786-0657 |
| Primary Part Number | 21953 |
| Item Name | Piston,fuel Pump |
| FSC / FSG | 2915 / 29 — Engine Fuel System Components, Aircraft and Missile Prime Movers |
| Manufacturer | Triumph Engine Control Systems Llc |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM ALLOY,QQ-A-200-3,ANODIZE,0.859 IN. O/A LG,0.3745 IN. MIN,0.3749 IN. MAX OD,4 SLOTS,0.050 IN. MIN,0.070 IN. MAX W,0.050 IN. MIN,0.070 IN. MAX DEEP IN |
| 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 |
|---|---|
| 21953 PRIMARY | Triumph Engine Control Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| 21953 | 5/9 Secondary reference U.S. Government activity |
| 21953 | 5/9 Secondary reference Kelsey-Hayes Company,inc. Dba Trw Aeronautical Systems-Lucas Aerospace Div Customer Support Americas Spares |
NSN 2915-00-786-0657 is a Piston,fuel Pump, manufactured by Triumph Engine Control Systems Llc, classified under FSC 2915, Engine Fuel System Components, Aircraft and Missile Prime Movers. Status: active.
NSN 2915-00-786-0657 has 1 manufacturer part number on file: 21953 (Triumph Engine Control Systems Llc).
3 possible matches (shared part number, not a government interchangeability claim): 5961-01-167-5575, 4720-01-533-5012, 4820-01-595-5446. Verify interchangeability with system specifications before substitution.
Key specifications for 21953: General Characteristics Item Description: ALUMINUM ALLOY,QQ-A-200-3,ANODIZE,0.859 IN. O/A LG,0.3745 IN. MIN,0.3749 IN. MAX OD,4 SLOTS,0.050 IN. MIN,0.070 IN. MAX W,0.050 IN. MIN,0.070 IN. MAX DEEP IN. 1 specification is 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.