Self-drilling screw washer head 75HA
Self-drilling screw washer head and PH recess
Fixings and innovative solutions for pros at CELO
Self-drilling screw countersunk head and SIT recess perfect fit
Self-drilling screw reduced drill bit with low head rivet type
Self-drilling screw reduced drill bit with raised countersunk head
Self-drilling screw wider head and SIT recess for easier screwing
Raised countersunk head with special thread for thin sheets assembly