1/8 " npt thread uses allan head wrench. 1/8" npt has a nominal o.d. of 0.406" 6061t6 grade alum. Blue anodized aluminum.
5x 3/8 NPT Pipe Plugs Male Thread Allen Socket Hex Countersunk Plugs block off
1/8" NPT Pipe Plugs Aluminum w/ allan head 12 per pkg Red anodized aluminum
1/4" NPT Pipe Plugs w/recessed allan head 12 per pkg Red anodized aluminum
1/4" NPT Pipe Plugs Aluminum w/ allan head 12 per pkg Gold anodized aluminum
1/4" NPT Pipe Plugs Alum w/ allan head 6 pack grade 6061t6Red anodized alum
Pack of 20. 1/2" NPT PIPE PLUGS ALLEN HEAD SS304
