The Piston, cataloged under National Stock Number 2920-01-283-5725, is classified within Federal Supply Class 2920 (Engine Electrical System Components, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Triumph Actuation Systems Llc Div Triumph Actuation Systems - Clemmons. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2920-01-283-5725 |
| Primary Part Number | 4100637-1 |
| Item Name | Piston |
| FSC / FSG | 2920 / 29 — Engine Electrical System Components, Nonaircraft |
| Manufacturer | Triumph Actuation Systems Llc Div Triumph Actuation Systems - Clemmons |
| Status | ACTIVE |
| FSC Application Data | STARTER,ENGINE,HYDRAULIC P/N 571999,NSN 2920011894272; APU P/N 161331-100 MOD T-62T-40LC-2 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4100637-1 PRIMARY | Triumph Actuation Systems Llc Div Triumph Actuation Systems - Clemmons (USA) |
| Reference | Meaning |
|---|---|
| 4100637-1 | 5/9 Secondary reference Honeywell International Inc Div Aerospace-South Bend (bendix Dr) |
NSN 2920-01-283-5725 is a Piston, manufactured by Triumph Actuation Systems Llc Div Triumph Actuation Systems - Clemmons, classified under FSC 2920, Engine Electrical System Components, Nonaircraft. Status: active.
NSN 2920-01-283-5725 has 1 manufacturer part number on file: 4100637-1 (Triumph Actuation Systems Llc Div Triumph Actuation Systems - Clemmons).
Key specifications for 4100637-1: FSC Application Data: STARTER,ENGINE,HYDRAULIC P/N 571999,NSN 2920011894272; APU P/N 161331-100 MOD T-62T-40LC-2; End Item Identification: KC-135R ACFT. 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.
NSN 2920-01-283-5725 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.