PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 278313R2
278313R2 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The GASKET is a the manufacturer industrial component. Key specifications include material: COPPER AND ASBESTOS OVERALL, hole_diameter: 0.440 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 3.750 INCHES NOMINAL IN, style_designator: NON-CIRCULAR, aperture_diameter: 1.375 INCHES NOMINAL IN, bolt_circle_diameter: 2.750 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-893-7737, 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
278313R2
NSN: 5330-00-893-7737
FSC: 5330
CAGE: 0SAT8 — KOMATSU AMERICA CORP. (USA)
SPECIFICATIONS
materialCOPPER AND ASBESTOS OVERALL
hole_diameter0.440 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width3.750 INCHES NOMINAL IN
style_designatorNON-CIRCULAR
aperture_diameter1.375 INCHES NOMINAL IN
bolt_hole_quantity2
bolt_circle_diameter2.750 INCHES NOMINAL IN
outside_corner_radius0.500 INCHES NOMINAL IN
cross-sectional_thickness0.062 INCHES NOMINAL IN
cross-sectional_shape_styleMETAL AND METALLIC MATERIALS
side_radius_from_gasket_center1.000 INCHES NOMINAL IN
NSN5330-00-893-7737
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 278313R2 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
HOLE DIAMETER: 0.440 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
MATERIAL: COPPER AND ASBESTOS OVERALL
•
OUTSIDE CORNER RADIUS: 0.500 INCHES NOMINAL IN
•
BOLT HOLE QUANTITY: 2
•
APERTURE DIAMETER: 1.375 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NON-CIRCULAR
•
CROSS-SECTIONAL SHAPE STYLE: METAL AND METALLIC MATERIALS
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER0.440 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
MATERIALCOPPER AND ASBESTOS OVERALL
OVERALL WIDTH3.750 INCHES NOMINAL IN
OUTSIDE CORNER RADIUS0.500 INCHES NOMINAL IN
BOLT HOLE QUANTITY2
APERTURE DIAMETER1.375 INCHES NOMINAL IN
STYLE DESIGNATORNON-CIRCULAR
CROSS-SECTIONAL SHAPE STYLEMETAL AND METALLIC MATERIALS
BOLT CIRCLE DIAMETER2.750 INCHES NOMINAL IN
SIDE RADIUS FROM GASKET CENTER1.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
C88506S1348CP1Interchangeable
interchangeable cross-reference
interchangeable
FFB171Interchangeable
interchangeable cross-reference
interchangeable
88506X1ANG5Interchangeable
interchangeable cross-reference
interchangeable
88506Interchangeable
interchangeable cross-reference
interchangeable
EN108TPInterchangeable
interchangeable cross-reference
interchangeable
D88506Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy 278313R2?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 278313R2?
278313R2 is a GASKET.
What parts can replace 278313R2?
There are 6 known substitutes for 278313R2: C88506S1348CP1, FFB171, 88506X1ANG5 and 3 more. Substitute compatibility should be verified for your specific system.
Is 278313R2 still available?
278313R2 is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 278313R2

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026