This is the nylon washer that goes between the regulator and cylinder.
O-Ring Silicone 11/16" ID x 1" 3/16" OD
Camlock Type E - Male w/ 1/2" Barb (Stainless Steel)
Camlock Type F - Male Camlock x 1/2" Male NPT (Stainless Steel)
Camlock Type C - Female Camlock x 1/2" Barb (Stainless Steel)
Camlock Type D - Female Camlock x 1/2" Female NPT
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