The Spark Plug, cataloged under National Stock Number 2920-00-231-7256, is classified within Federal Supply Class 2920 (Engine Electrical System Components, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Allied-Signal Inc Autolite Div. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2920-00-231-7256 |
| Primary Part Number | 145 |
| Item Name | Spark Plug |
| FSC / FSG | 2920 / 29 — Engine Electrical System Components, Nonaircraft |
| Manufacturer | Allied-Signal Inc Autolite Div |
| Status | ACTIVE |
| Width Across Flats | 0.625 INCHES NOMINAL IN |
| Height Above Mounting Surface | 2.000 INCHES NOMINAL IN |
| Usage Design | ENGINE OTHER THAN AIRCRAFT |
| Electrode Style | SINGLE FLAT SHELL GROUND ELECTRODE (SEE ALSO STYLE 4) |
| Body Style | UNSHIELDED, SOLID POST, TAPERED SEAT |
| Reach Length | 0.460 INCHES NOMINAL IN |
| Seat Major Diameter | 0.625 INCHES NOMINAL 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 |
|---|---|
| R-44T | General Motors Llc Dba General Motors Llc (USA) |
| 145 PRIMARY | Allied-Signal Inc Autolite Div (USA) |
| Reference | Meaning |
|---|---|
| ARF4 | 5/9 Secondary reference Ford Motor Co General Parts Division |
| R44T | 5/9 Secondary reference General Motors Llc Dba General Motors |
| ARF4 | 5/9 Secondary reference Ford Motor Craft |
| R-44T | 5/9 Secondary reference General Motors Corp AC-Delco Div Government Order Dept |
| 5613355 | 5/9 Secondary reference General Motors Corp Delco Remy Div |
| RV8C | 5/9 Secondary reference Champion Aviation Inc Automotive Div |
| 5613355 | 5/9 Secondary reference General Motors Llc Dba General Motors |
| 000117-1064 | 5/9 Secondary reference Lift Parts Mfg Co Inc Div of Echlin Mfg Co the |
| 5611557 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| R44T5613355 | 5/9 Secondary reference Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 |
| 145 | 5/9 Secondary reference Sorensen Mfg Co |
| 5613355 | 5/9 Secondary reference General Motors Corp Chevrolet Motor Div Special Products Dept |
| 177568 | 5/9 Secondary reference Hyster-Yale Group, Inc. |
| RBL8 | 5/9 Secondary reference Champion Aerospace Llc |
NSN 2920-00-231-7256 is a Spark Plug, manufactured by Allied-Signal Inc Autolite Div, classified under FSC 2920, Engine Electrical System Components, Nonaircraft. Status: active.
NSN 2920-00-231-7256 has 2 manufacturer part numbers on file: R-44T (General Motors Llc Dba General Motors Llc), 145 (Allied-Signal Inc Autolite Div).
Key specifications for 145: Width Across Flats: 0.625 INCHES NOMINAL IN; Height Above Mounting Surface: 2.000 INCHES NOMINAL IN; Usage Design: ENGINE OTHER THAN AIRCRAFT; Electrode Style: SINGLE FLAT SHELL GROUND ELECTRODE (SEE ALSO STYLE 4). 7 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.