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Technical Data Sheet
PartsTable / COMPONENT / 252621R1
252621R1 ✓ 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: ASBESTOS AND RUBBER CHLOROPRENE CLASS CR AND RUBBER SYNTHETIC OVERALL, overall_width: 6.125 INCHES NOMINAL IN, aperture_width: 5.250 INCHES NOMINAL IN, overall_length: 20.750 INCHES NOMINAL IN, aperture_length: 19.875 INCHES NOMINAL IN, style_designator: NON-CIRCULAR. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-252-3952, 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
252621R1
NSN: 5330-00-252-3952
FSC: 5330
CAGE: 0SAT8 — KOMATSU AMERICA CORP. (USA)
SPECIFICATIONS
materialASBESTOS AND RUBBER CHLOROPRENE CLASS CR AND RUBBER SYNTHETIC OVERALL
overall_width6.125 INCHES NOMINAL IN
aperture_width5.250 INCHES NOMINAL IN
overall_length20.750 INCHES NOMINAL IN
aperture_length19.875 INCHES NOMINAL IN
style_designatorNON-CIRCULAR
inside_corner_radius1.000 INCHES NOMINAL IN
outside_corner_radius1.438 INCHES NOMINAL IN
cross-sectional_thickness0.062 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationMIL-G-12803 +1253-A MIL SPEC 1ST MATERIAL RESPONSE OVERALL
NSN5330-00-252-3952
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 252621R1 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
•
APERTURE LENGTH: 19.875 INCHES NOMINAL IN
•
INSIDE CORNER RADIUS: 1.000 INCHES NOMINAL IN
•
APERTURE WIDTH: 5.250 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
STYLE DESIGNATOR: NON-CIRCULAR
•
MATERIAL: ASBESTOS AND RUBBER CHLOROPRENE CLASS CR AND RUBBER SYNTHETIC OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
APERTURE LENGTH19.875 INCHES NOMINAL IN
INSIDE CORNER RADIUS1.000 INCHES NOMINAL IN
OVERALL LENGTH20.750 INCHES NOMINAL IN
APERTURE WIDTH5.250 INCHES NOMINAL IN
OVERALL WIDTH6.125 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
STYLE DESIGNATORNON-CIRCULAR
MATERIALASBESTOS AND RUBBER CHLOROPRENE CLASS CR AND RUBBER SYNTHETIC OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-12803 +1253-A MIL SPEC 1ST MATERIAL RESPONSE OVERALL
OUTSIDE CORNER RADIUS1.438 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
02.77.54.12Interchangeable
interchangeable cross-reference
interchangeable
048011-18737Interchangeable
interchangeable cross-reference
interchangeable
18737Interchangeable
interchangeable cross-reference
interchangeable
PTL-29-489Interchangeable
interchangeable cross-reference
interchangeable
2440Interchangeable
interchangeable cross-reference
interchangeable
TUBIFASTInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 252621R1?
252621R1 is a GASKET.
What parts can replace 252621R1?
There are 7 known substitutes for 252621R1: 02.77.54.12, 048011-18737, 18737 and 4 more. Substitute compatibility should be verified for your specific system.
Is 252621R1 still available?
252621R1 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: July 2026