The Glow Plug, cataloged under National Stock Number 2920-01-040-0309, is classified within Federal Supply Class 2920 (Engine Electrical System Components, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2920-01-040-0309 |
| Primary Part Number | 4N4122 |
| Item Name | Glow Plug |
| FSC / FSG | 2920 / 29 — Engine Electrical System Components, Nonaircraft |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Distance Across Wrenching Surface Flats | 0.312 INCHES IN |
| Mounting Facility Nominal Thread Size | 0.375 INCHES 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 |
|---|---|
| 4N4122 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| IPD4N4122 | 5/9 Secondary reference Industrial Parts Depot, Llc Dba Ipd |
NSN 2920-01-040-0309 is a Glow Plug, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2920, Engine Electrical System Components, Nonaircraft. Status: active.
NSN 2920-01-040-0309 has 1 manufacturer part number on file: 4N4122 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 4N4122: Distance Across Wrenching Surface Flats: 0.312 INCHES IN; Mounting Facility Nominal Thread Size: 0.375 INCHES IN; Overall Length: 2.125 INCHES NOMINAL IN. 2 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.