PartsTable
Technical Data Sheet
PartsTable / O-RING / 22503-21
22503-21 ✓ 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 O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR, outside_diameter: 1.051 INCHES MINIMUM AND 1.081 INCHES MAXIMUM IN, center_hole_diameter: 0.920 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN, cross-sectional_height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-250-0227, 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
22503-21
NSN: 5331-00-250-0227
FSC: 5331 — O-RING
CAGE: R1120 — SATAIR A/S (DNK)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
outside_diameter1.051 INCHES MINIMUM AND 1.081 INCHES MAXIMUM IN
center_hole_diameter0.920 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN
cross-sectional_height0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
NSN5331-00-250-0227
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 22503-21 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
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
CENTER HOLE DIAMETER: 0.920 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 1.051 INCHES MINIMUM AND 1.081 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CENTER HOLE DIAMETER0.920 INCHES MINIMUM AND 0.932 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
OUTSIDE DIAMETER1.051 INCHES MINIMUM AND 1.081 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 35
203147Interchangeable
interchangeable cross-reference
interchangeable
A-020SR822-60Interchangeable
interchangeable cross-reference
interchangeable
GS570EM020Interchangeable
interchangeable cross-reference
interchangeable
MS29513-020Interchangeable
interchangeable cross-reference
interchangeable
622701B25Interchangeable
interchangeable cross-reference
interchangeable
R1392Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 22503-21?
22503-21 is a O-RING.
What parts can replace 22503-21?
There are 35 known substitutes for 22503-21: 203147, A-020SR822-60, GS570EM020 and 32 more. Substitute compatibility should be verified for your specific system.
Is 22503-21 still available?
22503-21 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: July 2026