The Valve,poppet,engine, cataloged under National Stock Number 2805-00-528-6258, is classified within Federal Supply Class 2805 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Brp Us Inc. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2805-00-528-6258 |
| Primary Part Number | 53-300 |
| Item Name | Valve,poppet,engine |
| FSC / FSG | 2805 / 28 — No Item Name Available |
| Manufacturer | Brp Us Inc |
| Status | ACTIVE |
| Distance From Hole Center to Stem End | 0.1840 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM IN |
| Outside Diameter | 0.8670 INCHES MINIMUM AND 0.8830 INCHES MAXIMUM IN |
| Chamfer Angle in Deg | 45.0 |
| Stem Length | 3.7820 INCHES MINIMUM AND 3.7880 INCHES MAXIMUM IN |
| Metallic Hardness Rating and Location | 50.0 ROCKWELL C MINIMUM TIP |
| FSC Application Data | GASOLINE ENGINE |
| Head Style | MUSHROOM |
| Seat Angle in Deg | 45.0 |
| Hole Diameter | 0.0820 INCHES NOMINAL IN |
| Carbon Relief Groove | NOT INCLUDED |
| Head Height | 0.1560 INCHES NOMINAL IN |
| Stem Diameter | 0.3090 INCHES MINIMUM AND 0.3100 INCHES MAXIMUM IN |
| Metallic Hardness Rating and Location | 56.0 ROCKWELL C MAXIMUM TIP |
| Neck Radius | 0.1875 INCHES NOMINAL IN |
| Stem Style | DRILLED |
| Chamfer Length | 0.0312 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 2805-00-528-6258 is a Valve,poppet,engine, manufactured by Brp Us Inc, classified under FSC 2805 (No Item Name Available). Status: active.
NSN 2805-00-528-6258 has 4 cross-referenced part numbers: 53A300 (Brp Us Inc), 53A300 (Outboard Marine Corp Johnson Motors Div), 53-300 (Brp Us Inc), 53-300 (Outboard Marine Corp Johnson Motors Div).
There are 6 known substitutes for 2805-00-528-6258: 5935-00-043-2978, 5365-00-119-7078, 5310-00-208-5211 and 3 more. Verify interchangeability with system specifications before substitution.
Key specifications for 53-300: Distance From Hole Center to Stem End: 0.1840 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM IN; Outside Diameter: 0.8670 INCHES MINIMUM AND 0.8830 INCHES MAXIMUM IN; Chamfer Angle in Deg: 45.0; Stem Length: 3.7820 INCHES MINIMUM AND 3.7880 INCHES MAXIMUM IN. 16 total characteristics are documented in the Federal Logistics Information System.