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Technical Data Sheet
PartsTable / COMPONENT / 31021F
31021F ✓ 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 STEEL OVERALL, hole_diameter: 0.562 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 3.000 INCHES NOMINAL IN, aperture_width: 2.000 INCHES NOMINAL IN, overall_length: 7.250 INCHES NOMINAL IN, aperture_length: 4.750 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-291-7447, 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
31021F
NSN: 5330-00-291-7447
FSC: 5330
CAGE: 56442 — DIAMOND REO TRUCK CO (USA)
SPECIFICATIONS
materialASBESTOS AND STEEL OVERALL
hole_diameter0.562 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width3.000 INCHES NOMINAL IN
aperture_width2.000 INCHES NOMINAL IN
overall_length7.250 INCHES NOMINAL IN
aperture_length4.750 INCHES NOMINAL IN
style_designatorNON-CIRCULAR
inside_corner_radius1.000 INCHES NOMINAL IN
cross-sectional_thickness0.094 INCHES NOMINAL IN
cross-sectional_shape_styleMETAL WITH SOFT FILLER
center_to_center_distance_between_bolt_holes_along_length6.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
NSN5330-00-291-7447
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 31021F 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
•
INSIDE CORNER RADIUS: 1.000 INCHES NOMINAL IN
•
MATERIAL: ASBESTOS AND STEEL OVERALL
•
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH: 6.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
STYLE DESIGNATOR: NON-CIRCULAR
•
APERTURE LENGTH: 4.750 INCHES NOMINAL IN
•
APERTURE WIDTH: 2.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE CORNER RADIUS1.000 INCHES NOMINAL IN
MATERIALASBESTOS AND STEEL OVERALL
OVERALL LENGTH7.250 INCHES NOMINAL IN
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG LENGTH6.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
STYLE DESIGNATORNON-CIRCULAR
OVERALL WIDTH3.000 INCHES NOMINAL IN
APERTURE LENGTH4.750 INCHES NOMINAL IN
APERTURE WIDTH2.000 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.094 INCHES NOMINAL IN
HOLE DIAMETER0.562 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 28
892-8Interchangeable
interchangeable cross-reference
interchangeable
H300Interchangeable
interchangeable cross-reference
interchangeable
HD-892-8Interchangeable
interchangeable cross-reference
interchangeable
B94.11MInterchangeable
interchangeable cross-reference
interchangeable
GGG-D-751Interchangeable
interchangeable cross-reference
interchangeable
1340Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 31021F?
31021F is a GASKET.
What parts can replace 31021F?
There are 28 known substitutes for 31021F: 892-8, H300, HD-892-8 and 25 more. Substitute compatibility should be verified for your specific system.
Is 31021F still available?
31021F is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026