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AF75BK00-OR-251
CS

0.139 in

(3.53 mm)

ID

5.109 in

(129.77 mm)

ORing cut reference

See Data Sheet

AFLAS AF75BK00 O-Ring, Size: -251

Material: AFLAS AF75BK00 O-Ring

Size: AS568 -251 O-Ring

Part Number: AF75BK00-OR-251

AF75BK00

AFLAS® (FEPM, TFE/P)

75

Shore A

General Purpose Material

Color: Black

Detailed Description

AF75BK00-OR-251 is a Black, 75 Shore A, AFLAS® (FEPM, TFE/P) O-Ring. AF75BK00 is manufactured with the following features & specifications: General Purpose Material. AF75BK00-OR-251 is AS568 size -251 O-Ring also referred to as 3.53mm (Cross Sectional Diameter (CS)) x 129.77mm (Inside Diameter (ID)).


Material: AFLAS AF75BK00 O-Ring


Size: AS568 -251, 3.53mm CS X 129.77mm ID (0.139" CS X 5.109" ID)

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Technical SpecificationValue
Compound NumberAF75BK00
MaterialAFLAS® (FEPM, TFE/P)
ColorBlack
Durometer75 Shore A
High Temperature235 °C / 455 °F
Low Temperature-10 °C / 14 °F
Geometry Specifications
Cross Sectional GeometryO-Ring
Size StandardAS568
Size-251
Cross Section (CS)3.53 mm / 0.139 in
Inside Diameter (ID)129.77 mm / 5.109 in
ORing cut reference

Canyon AF75BK00 is a 75 durometer black AFLAS® (TFE/P) elastomer formulated for reliable performance in O-rings and gaskets exposed to extreme heat, steam, and aggressive chemicals. This material provides outstanding resistance to amines, acids, bases, and high-pressure steam, making it ideal for use in steam-in-place (SIP) applications, chemical processing, and power generation systems. With a higher durometer rating, it offers improved extrusion resistance and dimensional stability in demanding sealing environments.

 

AF75BK00 maintains excellent thermal performance up to 450°F (232°C) while resisting compression set and chemical degradation over time. The compound also withstands up to 200 MRad of gamma radiation, making it suitable for sterilization and high-purity applications. As a cost-effective, high-strength AFLAS® formulation, it meets the needs of oil and gas, pharmaceutical, and industrial users seeking long-lasting seals that perform in harsh fluid and temperature conditions.