This O-Ring set is made of Black EPDM, has a durometer of 70A, and includes 200 pieces covering 12 dash sizes. The rings have a Round cross-section and can be used across a wide temperature range from -67 degrees F (-55 degrees C) to 257 degrees F (125 degrees C). The rings come in a plastic storage case designed for organization and portability. Designed for use in a variety of sealing applications, this EPDM O-Ring set meets standards defined by Aerospace Standard AS568A for quality assurance.
The set includes the following O-Rings: 35 pieces each for dash sizes 010, 011; 25 pieces for 012, 110; 15 pieces for 111; 10 pieces for 112, 113, 114, 115, 116; 8 pieces for 211; and 7 pieces for 212.
Ethylene propylene diene monomer (EPDM) is compatible for use with water and steam, silicone oil and grease, polar solvents (alcohols), acids, glycol-based brake fluids, ozone, and weathering. It is vulnerable to many oils, gasoline, and solvents. This material meets ASTM International standards.
The durometer hardness of this EPDM O-Ring is 70A. Durometers measure the hardness of a material and its resistance to permanent indentation. A higher durometer value indicates greater resistance to indentation. On a scale of 0 to 100, a value of 0 indicates that a sample was completely penetrated, while a value of 100 shows no indentation in the sample. The letter following the number identifies the shore scale, which is either shore A or D. Shore A is used for rubber, while shore D is used for harder plastics.
O-rings provide a pressure and fluid seal between cylindrically shaped, overlapping mating surfaces and are commonly seen in engines, faucets, flanges, valves, and various cylinders. They are circular in shape, with a round cross section, and a hole in the center, similar to a doughnut. O-rings are available in various AS568A dash sizes as well as Metric sizes. O-ring size is defined by the inside diameter (ID), outisde diameter (OD), and cross-sectional (CS) diameter.
What's in the box?
35 pieces each for dash sizes 010, 011
25 pieces for 012, 110; 15 pieces for 111
10 pieces for 112, 113, 114, 115, 116
8 pieces for 211; and 7 pieces for 212
plastic storage case with label to identify sizes