Male Coupler Nipple Showing all 3 results Default sorting Sort by popularity Sort by latest Sort by price: low to high Sort by price: high to low Sale! Sioux Tools 1316 Male Coupler Nipple | 1/4″ NPT Thread Size $14.92 Original price was: $14.92.$4.48Current price is: $4.48. Add to cart Sale! Sioux Tools 1317 Male Coupler Nipple | 3/8″ NPT Thread Size $62.46 Original price was: $62.46.$18.74Current price is: $18.74. Add to cart Sale! Sioux Tools 1318 Male Coupler Nipple | 1/2″ NPT Thread Size $20.18 Original price was: $20.18.$6.05Current price is: $6.05. Add to cart