The Spark Plug, cataloged under National Stock Number 2920-01-072-3385, is classified within Federal Supply Class 2920 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Tcm America, Inc Sc. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2920-01-072-3385 |
| Primary Part Number | B-4ES |
| Item Name | Spark Plug |
| FSC / FSG | 2920 / 29 — No Item Name Available |
| Manufacturer | Tcm America, Inc Sc |
| Status | ACTIVE |
| Body Style | UNSHIELDED, THREADED POST, GASKET SEAT |
| Electrode Style | SINGLE FLAT SHELL GROUND ELECTRODE (SEE ALSO STYLE 4) |
| Height Above Mounting Surface | 2.150 INCHES NOMINAL IN |
| Seat Major Diameter | 0.790 INCHES NOMINAL IN |
| Width Across Flats | 0.812 INCHES NOMINAL IN |
| Reach Length | 0.750 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 2920-01-072-3385 is a Spark Plug, manufactured by Tcm America, Inc Sc, classified under FSC 2920 (No Item Name Available). Status: active.
NSN 2920-01-072-3385 has 3 cross-referenced part numbers: RN-8 (Champion Aviation Inc Automotive Div), B-4ES (Tcm America, Inc Sc), RN-8 (Champion Aerospace Llc).
There are 2 known substitutes for 2920-01-072-3385: 2920-00-900-2923, 5120-01-485-1923. Verify interchangeability with system specifications before substitution.
Key specifications for B-4ES: Body Style: UNSHIELDED, THREADED POST, GASKET SEAT; Electrode Style: SINGLE FLAT SHELL GROUND ELECTRODE (SEE ALSO STYLE 4); Height Above Mounting Surface: 2.150 INCHES NOMINAL IN; Seat Major Diameter: 0.790 INCHES NOMINAL IN. 6 total characteristics are documented in the Federal Logistics Information System.