AS568-243 FKM 90 Duro Black O-Ring for 4-1/8 ID X 1/8 CS

FKM O-Rings 90 Duro Black V900100-243

$ 2.67 per Each

Minimum Order Quantity (MOQ): 12

Ships within 14 days

Qty	Price
12 - 13	$2.6700
14 - 28	$2.0025
29 - 56	$1.6020
57 - 112	$1.2015
113+	$1.0900

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Product Details

Material	FKM
Temperature Range	-15°F to 400°F
Cross Sectional Shape	Round
Hardness	90
Dash	243
Fractional	ID: 4-1/8 CS: 1/8 OD: 4-3/8
Actual (Inch)	ID: 4.109 ± 0.028 CS: 0.139 ± 0.004 OD: 4.387
Actual (Metric)	ID: 104.37 ± 0.71 CS: 3.53 ± 0.10 OD: 111.430

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.