SMK-20-08S-B-K-W3 SMK-20-1/4NPT-D-W3 SMK-20-1/8NPT-D-W3 SMK2050 SMK2050CI SMK-20-7/16UNF-V-E-W3 SMK-20-9/16UNF-B-E-W3 SMK-20-G1/4-B-C-W3 SMK-20-G1/4-V-C-W3 SMK-20-G1/4-V-C-W4