Series H40 nuts have no thickness variations, no cutoff burrs, and are available in 11 thread sizes from 1/8 in.-27 to 5/8 in.-27. Series R10 have clean, full-formed knurls that are free of slivers and flakes, and come in six diameters from 9/16 to 3/4 in. Standard materials for all nuts are brass, 303 stainless steel, and aluminum. Standard finishes are plain, bright nickel, passivated, and zinc with chromate.

Spirol Ascutney, a subsidiary of Spirol International Corp., 2637 U.S. Route 5 N, Windsor, VT 0589, (802) 674-6721,