C657: VALVE,POPPET,ENGINE.
The VALVE,POPPET,ENGINE is a the manufacturer industrial component. Key specifications include head_style: FLAT, stem_style: TAPERED, head_height: 0.1719 INCHES NOMINAL IN, neck_radius: 0.2500 INCHES NOMINAL IN, stem_length: 4.5319 INCHES MINIMUM AND 4.5460 INCHES MAXIMUM IN, stem_diameter: 0.3080 INCHES MINIMUM AND 0.3090 INCHES MAXIMUM IN. This part is cataloged in the U.S.
Government catalog under NSN 2805-00-353-5830, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.
Verify compatibility with your specific system configuration before ordering.
| head_style | FLAT |
| stem_style | TAPERED |
| head_height | 0.1719 INCHES NOMINAL IN |
| neck_radius | 0.2500 INCHES NOMINAL IN |
| stem_length | 4.5319 INCHES MINIMUM AND 4.5460 INCHES MAXIMUM IN |
| stem_diameter | 0.3080 INCHES MINIMUM AND 0.3090 INCHES MAXIMUM IN |
| chamfer_length | 0.0312 INCHES NOMINAL IN |
| outside_diameter | 1.2450 INCHES MINIMUM AND 1.2550 INCHES MAXIMUM IN |
| seat_angle_in_deg | 45.0 |
| taper_angle_in_deg | 15.0 |
| carbon_relief_groove | NOT INCLUDED |
| chamfer_angle_in_deg | 45.0 |
| NSN | 2805-00-353-5830 |
| STEM DIAMETER | 0.3080 INCHES MINIMUM AND 0.3090 INCHES MAXIMUM IN |
| FSC APPLICATION DATA | GASOLINE ENGINE |
| HEAD HEIGHT | 0.1719 INCHES NOMINAL IN |
| STEM LENGTH | 4.5319 INCHES MINIMUM AND 4.5460 INCHES MAXIMUM IN |
| SEAT ANGLE IN DEG | 45.0 |
| CHAMFER LENGTH | 0.0312 INCHES NOMINAL IN |
| NECK RADIUS | 0.2500 INCHES NOMINAL IN |
| MINOR OUTSIDE DIAMETER | 0.1960 INCHES MINIMUM AND 0.2000 INCHES MAXIMUM IN |
| METALLIC HARDNESS RATING AND LOCATION | 43.0 SHORE SCLEROSCOPE MINIMUM TIP |
| OUTSIDE DIAMETER | 1.2450 INCHES MINIMUM AND 1.2550 INCHES MAXIMUM IN |
No substitute or cross-reference records for this part.