Quick view 1/4-20 x 5/8 Slotted H/W Zinc Plated Swageform® (Box of 25) Box of 25. 1/4-20 x 5/8 Slotted H/W Zinc Plated Swageform® Swageform® Is THE High Performance Threadforming Screw. Swageform® thread forming screws have been superior performers in automotive, industrial, and consumer assembles for over... MSRP: Was: Now: $4.05 Add to Cart