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Technical Data Sheet
PartsTable / O-RING / D49440ITEM 28
D49440ITEM 28 ✓ 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: 4.974 INCHES MINIMUM AND 5.050 INCHES MAXIMUM IN, center_hole_diameter: 4.719 INCHES MINIMUM AND 4.749 INCHES MAXIMUM IN, cross-sectional_height: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-019-2607, 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
D49440ITEM 28
NSN: 5331-01-019-2607
FSC: 5331 — O-RING
CAGE: 34889 — HUNT VALVE COMPANY INC DBA UNION FLONETICS (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
outside_diameter4.974 INCHES MINIMUM AND 5.050 INCHES MAXIMUM IN
center_hole_diameter4.719 INCHES MINIMUM AND 4.749 INCHES MAXIMUM IN
cross-sectional_height0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
NSN5331-01-019-2607
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: D49440ITEM 28 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
•
CENTER HOLE DIAMETER: 4.719 INCHES MINIMUM AND 4.749 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 4.974 INCHES MINIMUM AND 5.050 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER4.719 INCHES MINIMUM AND 4.749 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.135 INCHES MINIMUM AND 0.143 INCHES MAXIMUM IN
OUTSIDE DIAMETER4.974 INCHES MINIMUM AND 5.050 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
1022159-246Interchangeable
interchangeable cross-reference
interchangeable
PS1-30-5-26Interchangeable
interchangeable cross-reference
interchangeable
2531Interchangeable
interchangeable cross-reference
interchangeable
4067-70-248Interchangeable
Same NIIN cross-reference
interchangeable
7377-248Interchangeable
Same NIIN cross-reference
interchangeable
PRP568-248-4067-70Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is D49440ITEM 28?
D49440ITEM 28 is a O-RING.
What parts can replace D49440ITEM 28?
There are 11 known substitutes for D49440ITEM 28: 1022159-246, PS1-30-5-26, 2531 and 8 more. Substitute compatibility should be verified for your specific system.
Is D49440ITEM 28 still available?
D49440ITEM 28 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