... .9etc.SizeM0.8~M12MaterialStainless,Steel,Brass,Steel,Bronze,Iron,Aluminum,Carbon steel,Alloy steel,silicon bronze,etc.Head/Tread stylesAccording client's ... U bolts, masonry bolts, roofing bolts.Nuts: spring nuts, T nuts, K nuts, rivet nuts, cage nuts, lock nuts ... wing nuts, weld nuts, square nuts, cap nuts.Washers: flat washers, spring washers, lock washers, structural Washers. square washer ...