5/16" Delrin Tank Knobs

  5/16” Delrin Tank Knobs    5/16” Delrin Tank Knob   2 to a pack   This is your standard 5/16 tank knob. They are milled from solid block of Delrin thermoplastic. This is a durable alternative to traditional wing nuts. The delrin tank knobs have a knurled gripping surface for easier assembly/disassembly of dive gear