PMF Series is a one-sided Bulkhead that is tank-mountable with a flange. It is available in Nylon, Black Nylon, Polypropylene, HDPE, and PVDF. UNF thread sizes are 5/16-24, 10-32 and 1/4-28. In addition, the NPS sizes are 1/8" and 1/4". Barb sizes are 1/16", 1/8", 5/32", 3/16", and 1/4". (order as NN, BN, PP, HDPE, PVDF) O-Rings available.