Comparison : Item # 107HSS1/8, St. St. 316 Hollow Hex Head Plug, Male NPT Thread 1/8”
Item # 107HSS1/4, St. St. 316 Hollow Hex Head Plug, Male NPT Thread 1/4”
Item # 107HSS3/8, St. St. 316 Hollow Hex Head Plug, Male NPT Thread 3/8”
Item # 107HSS1/2, St. St. 316 Hollow Hex Head Plug, Male NPT Thread 1/2”
Item # 107HB1/8, Brass Hollow Hex Head Plug, Male NPT Thread 1/8”