The Spark Plug, cataloged under National Stock Number 2920-00-841-1890, is classified within Federal Supply Class 2920 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Champion Aerospace Llc. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 16 commercial cross-references from 16 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2920-00-841-1890 |
| Primary Part Number | XMD18 |
| Item Name | Spark Plug |
| FSC / FSG | 2920 / 29 — No Item Name Available |
| Manufacturer | Champion Aerospace Llc |
| Status | ACTIVE |
| Width Across Flats | 0.865 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN |
| DC Resistance Rating in Ohms | 10000.0 NOMINAL |
| Body Style | ELECTRICALLY SHIELDED, PARTIAL INSULATOR, GASKET SEAT |
| Reach Length | 0.500 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | 1 TYPE AND A CLASS |
| Seat Major Diameter | 0.980 INCHES NOMINAL IN |
| Top to Shield Thread Distance | 0.094 INCHES MINIMUM AND 0.156 INCHES MAXIMUM IN |
| Shield Thread Length | 0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN |
| Terminal Sleeve Inside Diameter | 0.301 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN |
| Top to Terminal Contact Distance | 1.220 INCHES MINIMUM AND 1.320 INCHES MAXIMUM IN |
| Height Above Mounting Surface | 2.875 INCHES NOMINAL IN |
| Barrel Inside Diameter | 0.505 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Pressure Rating | 155.0 POUNDS PER SQUARE INCH (PSI) NOMINAL MEAN EFFECTIVE LBS |
| Electrode Style | SINGLE FLAT SHELL GROUND ELECTRODE (SEE ALSO STYLE 4) |
| Thread Size and Series/type Designator | 5/8-24 UNEF SHIELD |
| Usage Design | ENGINE OTHER THAN AIRCRAFT |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| XMD18 | Champion Aerospace Llc (USA) |
| BR7S | Ford Motor Co Ford Parts and Service Div Government Part Sales (USA) |
| YD297S1 | Wisconsin Motors, Llc (USA) |
| SP205XMD18 | Minnpar, Llc Dba Minnpar (USA) |
| BR7S | Ford Motor Co General Parts Division (USA) |
| CFR40951 | Curtis Dyna-Fog, Ltd. (USA) |
| SP205XMD18 | Ingersoll Rand Co (USA) |
| SP205XMD18 | Teledyne Continental Motors Industrial Products Div Teledyne Industries Inc Sub of Teledyne Inc (USA) |
| MS51009-2 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| 10A17003 | White Farm Equipment Co Sub of Tic Investment Inc (USA) |
| SP205XMD18 | Barber-Greene Co (USA) |
| JHP49-088 | Hollingsworth John R Co (USA) |
| SR8E15C | Zeller Corp the (USA) |
| 2224 | Allied-Signal Inc Autolite Div (USA) |
| W-S-506 | Federal Specifications Promulgated by General Services Administration Washington DC (USA) |
| WR86 | General Motors Llc Dba General Motors (USA) |
NSN 2920-00-841-1890 is a Spark Plug, manufactured by Champion Aerospace Llc, classified under FSC 2920 (No Item Name Available). Status: active.
NSN 2920-00-841-1890 has 16 cross-referenced part numbers: XMD18 (Champion Aerospace Llc), BR7S (Ford Motor Co Ford Parts and Service Div Government Part Sales), YD297S1 (Wisconsin Motors, Llc), SP205XMD18 (Minnpar, Llc Dba Minnpar), BR7S (Ford Motor Co General Parts Division) and 11 more.
There are 12 known substitutes for 2920-00-841-1890: 6625-00-022-7979, 5360-00-097-1705, 2330-00-580-7860 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for XMD18: Width Across Flats: 0.865 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN; Special Features: GRUMMAN A-10 AIRCRAFT; DC Resistance Rating in Ohms: 10000.0 NOMINAL; Body Style: ELECTRICALLY SHIELDED, PARTIAL INSULATOR, GASKET SEAT. 17 total characteristics are documented in the Federal Logistics Information System.