The Lead,ignition,engine, cataloged under National Stock Number 2925-01-087-9290, is classified within Federal Supply Class 2925 (Engine Electrical System Components, Aircraft Prime Moving) of the Engine Accessories group. The manufacturer of record is Unison Industries Llc. Government technical data includes 6 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2925-01-087-9290 |
| Primary Part Number | 66493-2 |
| Item Name | Lead,ignition,engine |
| FSC / FSG | 2925 / 29 — Engine Electrical System Components, Aircraft Prime Moving |
| Manufacturer | Unison Industries Llc |
| Status | ACTIVE |
| Round Conductor Size | 14 AWG FIRST CONDUCTOR |
| Lead Overall Length | 24.500 INCHES MINIMUM AND 25.000 INCHES MAXIMUM IN |
| Conductor Form | SOLID FIRST CONDUCTOR |
| Conductor Form | BRAID, FLAT SECOND CONDUCTOR |
| Specification/standard Data | 99207--50TF2210 MANUFACTURERS SPECIFICATION |
| Nondefinitive Spec/std Data | B CLASS |
| 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 |
|---|---|
| 66493-2 PRIMARY | Unison Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| 2925PL2144148 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 66493-2 | 5/2 Secondary reference U.S. Government activity |
| 66493-2 | 5/9 Secondary reference U.S. Government activity |
| 4052T54P02 | 5/2 Secondary reference U.S. Government activity |
| 710378 | 5/9 Secondary reference U.S. Government activity |
| 710378 | 5/9 Secondary reference Unison Industries Llc |
NSN 2925-01-087-9290 is a Lead,ignition,engine, manufactured by Unison Industries Llc, classified under FSC 2925, Engine Electrical System Components, Aircraft Prime Moving. Status: active.
NSN 2925-01-087-9290 has 1 manufacturer part number on file: 66493-2 (Unison Industries Llc).
1 possible match (shared part number, not a government interchangeability claim): 7025-01-525-4781. Verify interchangeability with system specifications before substitution.
Key specifications for 66493-2: Round Conductor Size: 14 AWG FIRST CONDUCTOR; Lead Overall Length: 24.500 INCHES MINIMUM AND 25.000 INCHES MAXIMUM IN; Conductor Form: SOLID FIRST CONDUCTOR; Conductor Form: BRAID, FLAT SECOND CONDUCTOR. 6 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.