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Technical Data Sheet
PartsTable / O-RING / WES-00251-20W1 ITEM 16
WES-00251-20W1 ITEM 16 ✓ 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 FLUOROCARBON CLASS FPM, temp_rating: -20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF, hardness_rating: 75.0 SHORE DUROMETER A NOMINAL, outside_diameter: 7.145 INCHES NOMINAL IN, center_hole_diameter: 6.685 INCHES MINIMUM AND 7.765 INCHES MAXIMUM IN, elongation_percentage: 125 MAXIMUM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-01-006-2105, 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
WES-00251-20W1 ITEM 16
NSN: 5331-01-006-2105
FSC: 5331 — O-RING
CAGE: 60047 — PALL AEROPOWER CORP SUB OF PALL CORP MECTRON INDUSTRIES DIV (USA)
SPECIFICATIONS
materialRUBBER FLUOROCARBON CLASS FPM
temp_rating-20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
hardness_rating75.0 SHORE DUROMETER A NOMINAL
outside_diameter7.145 INCHES NOMINAL IN
center_hole_diameter6.685 INCHES MINIMUM AND 7.765 INCHES MAXIMUM IN
elongation_percentage125 MAXIMUM
cross-sectional_height0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
NSN5331-01-006-2105
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: WES-00251-20W1 ITEM 16 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
•
ELONGATION PERCENTAGE: 125 MAXIMUM
•
OUTSIDE DIAMETER: 7.145 INCHES NOMINAL IN
•
CENTER HOLE DIAMETER: 6.685 INCHES MINIMUM AND 7.765 INCHES MAXIMUM IN
•
HARDNESS RATING: 75.0 SHORE DUROMETER A NOMINAL
•
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
•
TEMP RATING: -20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
•
CROSS-SECTIONAL HEIGHT: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
ELONGATION PERCENTAGE125 MAXIMUM
OUTSIDE DIAMETER7.145 INCHES NOMINAL IN
CENTER HOLE DIAMETER6.685 INCHES MINIMUM AND 7.765 INCHES MAXIMUM IN
HARDNESS RATING75.0 SHORE DUROMETER A NOMINAL
MATERIALRUBBER FLUOROCARBON CLASS FPM
TEMP RATING-20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
CROSS-SECTIONAL HEIGHT0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
KM69704Interchangeable
interchangeable cross-reference
interchangeable
6532NCM163268Interchangeable
interchangeable cross-reference
interchangeable
1444887Interchangeable
interchangeable cross-reference
interchangeable
68741Interchangeable
interchangeable cross-reference
interchangeable
68741 ITEM 18Interchangeable
interchangeable cross-reference
interchangeable
69704Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is WES-00251-20W1 ITEM 16?
WES-00251-20W1 ITEM 16 is a O-RING.
What parts can replace WES-00251-20W1 ITEM 16?
There are 14 known substitutes for WES-00251-20W1 ITEM 16: KM69704, 6532NCM163268, 1444887 and 11 more. Substitute compatibility should be verified for your specific system.
Is WES-00251-20W1 ITEM 16 still available?
WES-00251-20W1 ITEM 16 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