Selbstschneidende Schrauben

3,677 lines of thread-forming screws, from M1.0 up to M12, in pan, countersunk, truss and washer heads. GB 845 covers the pan head range, JIS B 1122 truss heads and DIN 571 hex wood screws serve imported equipment and timber work, and 304 stainless accounts for 1,531 of the lines — 316 another 320. Plain, nickel and black zinc finishes are all stocked, with self-drilling drywall screws in the small GB 14210 range. Head forms, ISO 7049 dimensions and the DIN 7981 / 7982 equivalents are set out in the self-tapping screw guide.