M4-0.7X18 ISO 7045 Metric Phillips Pan External Washer Sems M/S Fully Threaded Zinc/Bake (Pack Qty 3,000) BC-MI418EPP

Steel: The washer/screw assembly makes this a locking screw with the washer providing the locking action. Machine pre-assembly provides cost savings to the end user. The external tooth variety offers greater torsional resistance than an internal tooth Sems Stainless: Offers same advantages of the steel variety but with superior resistance to corrossion Steel: . C1050 Carbon Steel. C1008 or equivalent carbonYou may also like 7-16X1/2 Slotted Ind Hex washer 1/4" Across The Flats Full Thread Self Piercing Screw Needle Point Zinc (Pack Qty 10,000) BC-0708PSW.