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1PE257 — INSERT,ENGINE VALVE SEAT

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

1PE257: INSERT,ENGINE VALVE SEAT.

The INSERT,ENGINE VALVE SEAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, overall_height: 0.281 INCHES MINIMUM AND 0.283 INCHES MAXIMUM IN, style_designator: PLAIN, body_inside_diameter: 1.584 INCHES MINIMUM AND 1.589 INCHES MAXIMUM IN, body_outside_diameter: 2.019 INCHES NOMINAL IN, seating_surface_shape: FLAT. This part is cataloged in the U.S.

Government catalog under NSN 2815-00-198-8708, 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.

WHERE IT FITS
1PE257
NSN: 2815-00-198-8708
FSC: 2815 — Diesel Engines and Components
CAGE: 75Q65 — OSHKOSH DEFENSE LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_height0.281 INCHES MINIMUM AND 0.283 INCHES MAXIMUM IN
style_designatorPLAIN
body_inside_diameter1.584 INCHES MINIMUM AND 1.589 INCHES MAXIMUM IN
body_outside_diameter2.019 INCHES NOMINAL IN
seating_surface_shapeFLAT
NSN2815-00-198-8708
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available INSERT,ENGINE VALVE SEAT TITLE COMPONENT PN 1PE257 MFR INSERT,ENGINE VALVE SE
KEY FEATURES
•
BODY OUTSIDE DIAMETER: 2.019 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN
•
BODY INSIDE DIAMETER: 1.584 INCHES MINIMUM AND 1.589 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
SEATING SURFACE SHAPE: FLAT
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.281 INCHES MINIMUM AND 0.283 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER2.019 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN
BODY INSIDE DIAMETER1.584 INCHES MINIMUM AND 1.589 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
SEATING SURFACE SHAPEFLAT
SUBSTITUTES & CROSS-REFERENCES 3
145231Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
33125121Reference document
Same NSN cross-reference
Reference document — Secondary reference
EA-0005-72PReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1PE257?
1PE257 is a INSERT,ENGINE VALVE SEAT.
What parts can replace 1PE257?
There are 3 known substitutes for 1PE257: 145231, 33125121, EA-0005-72P. Substitute compatibility should be verified for your specific system.
What is the NSN for 1PE257?
1PE257 is cataloged in the U.S. Government catalog under NSN 2815-00-198-8708. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.