The Valve,poppet,engine, cataloged under National Stock Number 2805-00-737-8857, is classified within Federal Supply Class 2805 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is General Motors Llc Dba General Motors Llc. Government technical data includes 25 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 | 2805-00-737-8857 |
| Primary Part Number | 4-2670 |
| Item Name | Valve,poppet,engine |
| FSC / FSG | 2805 / 28 — No Item Name Available |
| Manufacturer | General Motors Llc Dba General Motors Llc |
| Status | ACTIVE |
| First Groove Width | 0.0950 INCHES MINIMUM AND 0.1050 INCHES MAXIMUM IN |
| Second Groove Width | 0.0390 INCHES MINIMUM AND 0.0450 INCHES MAXIMUM IN |
| Distance From First Groove to Stem End | 0.1830 INCHES NOMINAL IN |
| Distance From Second Groove to Stem End | 0.4540 INCHES NOMINAL IN |
| Chamfer Angle in Deg | 45.0 |
| Seat Angle in Deg | 45.0 |
| Metallic Hardness Rating and Location | 30.0 ROCKWELL C MINIMUM HEAD |
| FSC Application Data | GASOLINE ENGINE |
| Metallic Hardness Rating and Location | 40.0 ROCKWELL C MAXIMUM HEAD |
| Head Height | 0.1400 INCHES MINIMUM AND 0.1600 INCHES MAXIMUM IN |
| Metallic Hardness Rating and Location | 40.0 ROCKWELL C MAXIMUM SEAT FACE |
| Outside Diameter | 1.7450 INCHES MINIMUM AND 1.7550 INCHES MAXIMUM IN |
| Metallic Hardness Rating and Location | 30.0 ROCKWELL C MINIMUM SEAT FACE |
| Neck Radius | 0.3120 INCHES NOMINAL IN |
| Head Style | FLAT |
| First Groove Diameter | 0.2980 INCHES MINIMUM AND 0.3040 INCHES MAXIMUM IN |
| Stem Diameter | 0.3415 INCHES MINIMUM AND 0.3425 INCHES MAXIMUM IN |
| Second Groove Diameter | 0.2740 INCHES MINIMUM AND 0.2800 INCHES MAXIMUM IN |
| Metallic Hardness Rating and Location | 30.0 ROCKWELL C MINIMUM STEM |
| Stem Style | DOUBLE GROOVED |
| Stem Length | 4.5515 INCHES MINIMUM AND 4.5965 INCHES MAXIMUM IN |
| Metallic Hardness Rating and Location | 45.0 ROCKWELL C NOMINAL TIP |
| Chamfer Length | 0.0312 INCHES NOMINAL IN |
| Carbon Relief Groove | NOT INCLUDED |
| Metallic Hardness Rating and Location | 40.0 ROCKWELL C MAXIMUM STEM |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 2805-00-737-8857 is a Valve,poppet,engine, manufactured by General Motors Llc Dba General Motors Llc, classified under FSC 2805 (No Item Name Available). Status: active.
NSN 2805-00-737-8857 has 3 cross-referenced part numbers: 4-2670 (General Motors Llc Dba General Motors Llc), 7378857 (U S Army Tank Automotive Command Amsta-Im-Mm), 4-2670 (General Motors Corp).
There are 2 known substitutes for 2805-00-737-8857: 5360-01-108-8126, 1670-01-672-8504. Verify interchangeability with system specifications before substitution.
Key specifications for 4-2670: First Groove Width: 0.0950 INCHES MINIMUM AND 0.1050 INCHES MAXIMUM IN; Second Groove Width: 0.0390 INCHES MINIMUM AND 0.0450 INCHES MAXIMUM IN; Distance From First Groove to Stem End: 0.1830 INCHES NOMINAL IN; Distance From Second Groove to Stem End: 0.4540 INCHES NOMINAL IN. 25 total characteristics are documented in the Federal Logistics Information System.