AS568-259 FKM 75 Duro Black O-Ring for 6-1/4 ID X 1/8 CS

FKM O-Rings 75 Duro Black V750100-259

$ 3.88 per Each

Minimum Order Quantity (MOQ): 8

Ships within 7 days

Qty	Price
8 - 9	$3.8800
10 - 19	$2.9100
20 - 38	$2.3280
39 - 77	$1.7460
78+	$1.6300

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Product Details

Material	FKM
Temperature Range	-15°F to 400°F
Cross Sectional Shape	Round
Hardness	75
Dash	259
Fractional	ID: 6-1/4 CS: 1/8 OD: 6-1/2
Actual (Inch)	ID: 6.234 ± 0.040 CS: 0.139 ± 0.004 OD: 6.512
Actual (Metric)	ID: 158.34 ± 1.02 CS: 3.53 ± 0.10 OD: 165.400

FKM (Fluorocarbon) O-rings are made from a synthetic rubber compound primarily consisting of vinylidene fluoride (VDF) and hexafluoropropylene (HFP). These seals are known for their excellent resistance to high temperatures, chemicals, oils, and fuels. FKM square-profile rings provide superior mechanical strength, excellent resistance to aging, and high resistance to aggressive media, making them ideal for high-performance applications across automotive, industrial, and aerospace sectors.

FKM Recommended Uses

Seals and gaskets, chemical processing, automotive fuel systems, hydraulic systems, aerospace applications, high-temperature applications, oil and gas industry, and extreme environment applications.

FKM Not Recommended

Ketones, esters, amines, low molecular weight acids, and some high-temperature steam systems.

FKM Limitations

Not suitable for low-temperature environments.
Limited performance in swelling from contact with certain fuels and solvents.
Not recommended for applications involving polar solvents.
Not ideal for applications that involve high shear or abrasion conditions.

FKM Usable Temperature Range

-20 to 450°F (-29 to 232°C)

FKM Also Known As

FKM, Viton®, Fluorel®, Fluroelastomer, Fluorocarbon Elastomer.