1638T-256-AL-7,ROUND STANDOFFCLEAR IRIDITERD FE
1638T-256-B,ROUND STANDOFFPLAIN BRASS3/16 RD
1638T-256-N,ROUND STANDOFFNO FINISH - NYLON3
1638T-256-S,ROUND STANDOFFPLAIN STEEL3/16 RD
1638T-256-SS,ROUND STANDOFFPLAIN STAINLESS ST
1638T-440-AL,ROUND STANDOFFPLAIN ALUMINUM3/16
1638T-440-B,ROUND STANDOFFPLAIN BRASS3/16 RD
1638T-440-B-12,ROUND STANDOFFCLEAR ZINCRD FEMAL