4S8903 — INSERT,ENGINE VALVE SEAT

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

4S8903: INSERT,ENGINE VALVE SEAT.

The INSERT,ENGINE VALVE SEAT is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, overall_height: 0.365 INCHES NOMINAL IN, style_designator: PLAIN, seat_angle_in_deg: 39.628 NOMINAL, body_inside_diameter: 1.401 INCHES NOMINAL IN, body_outside_diameter: 1.697 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 2815-00-116-9557, 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

4S8903

NSN: 2815-00-116-9557
FSC: 2815 — Diesel Engines and Components
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)

SPECIFICATIONS

material	STEEL OVERALL
overall_height	0.365 INCHES NOMINAL IN
style_designator	PLAIN
seat_angle_in_deg	39.628 NOMINAL
body_inside_diameter	1.401 INCHES NOMINAL IN
body_outside_diameter	1.697 INCHES NOMINAL IN
seating_surface_shape	ANGULAR
NSN	2815-00-116-9557

COMPONENT DIAGRAM

KEY FEATURES

•

BODY OUTSIDE DIAMETER: 1.697 INCHES NOMINAL IN

•

STYLE DESIGNATOR: PLAIN

•

BODY INSIDE DIAMETER: 1.401 INCHES NOMINAL IN

•

MATERIAL: STEEL OVERALL

•

SEAT ANGLE IN DEG: 39.628 NOMINAL

•

SEATING SURFACE SHAPE: ANGULAR

TECHNICAL CHARACTERISTICS

OVERALL HEIGHT	0.365 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER	1.697 INCHES NOMINAL IN
STYLE DESIGNATOR	PLAIN
BODY INSIDE DIAMETER	1.401 INCHES NOMINAL IN
MATERIAL	STEEL OVERALL
SEAT ANGLE IN DEG	39.628 NOMINAL
SEATING SURFACE SHAPE	ANGULAR

OTHER ITEMS IN FSC 2815 — Diesel Engines and Components

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

2815-00-011-9099 2815-00-017-1875 2815-00-024-4185 2815-00-033-1482 2815-00-036-5350 2815-00-179-7630 2815-00-346-4639 2815-00-592-5308

SUBSTITUTES & CROSS-REFERENCES 1

IPD4S8903Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 4S8903?

4S8903 is a INSERT,ENGINE VALVE SEAT.

What parts can replace 4S8903?

There is 1 known substitute for 4S8903: IPD4S8903. Substitute compatibility should be verified for your specific system.

What is the NSN for 4S8903?

4S8903 is cataloged in the U.S. Government catalog under NSN 2815-00-116-9557. This indicates validated use in U.S. government and defense supply chains.

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