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Technical Data Sheet
PartsTable / O-RING / MS9021-126
MS9021-126 ✓ 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, hardness_rating: 65.0 SHORE DUROMETER A NOMINAL, outside_diameter: 1.550 INCHES MINIMUM AND 1.586 INCHES MAXIMUM IN, center_hole_diameter: 1.356 INCHES MINIMUM AND 1.368 INCHES MAXIMUM IN, cross-sectional_height: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-265-1076, 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
MS9021-126
NSN: 5331-00-265-1076
FSC: 5331 — O-RING
CAGE: U7384 — MSI-DEFENCE SYSTEMS LTD (GBR)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
hardness_rating65.0 SHORE DUROMETER A NOMINAL
outside_diameter1.550 INCHES MINIMUM AND 1.586 INCHES MAXIMUM IN
center_hole_diameter1.356 INCHES MINIMUM AND 1.368 INCHES MAXIMUM IN
cross-sectional_height0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
NSN5331-00-265-1076
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS9021-126 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: 1.356 INCHES MINIMUM AND 1.368 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 1.550 INCHES MINIMUM AND 1.586 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
CENTER HOLE DIAMETER1.356 INCHES MINIMUM AND 1.368 INCHES MAXIMUM IN
OUTSIDE DIAMETER1.550 INCHES MINIMUM AND 1.586 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.100 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
211-110Interchangeable
interchangeable cross-reference
interchangeable
P524-24Interchangeable
interchangeable cross-reference
interchangeable
MS29513-218ESInterchangeable
interchangeable cross-reference
interchangeable
MS29513-218Interchangeable
interchangeable cross-reference
interchangeable
2-126N674-70Interchangeable
interchangeable cross-reference
interchangeable
2-126 N674-7Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS9021-126?
MS9021-126 is a O-RING.
What parts can replace MS9021-126?
There are 21 known substitutes for MS9021-126: 211-110, P524-24, MS29513-218ES and 18 more. Substitute compatibility should be verified for your specific system.
Is MS9021-126 still available?
MS9021-126 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