Punches_and_Dies

Ref: PRESTAUTO Thread Forming Unit Screw A B C E F G H M L2 L4 L5 max Thickness B3.5 2.5 3.5 9.525 2.5 2.5 2.8 9.525 14.2 20 56.80 2.00 B3.9 2.9 3.9 2.9 2.9 3.2 B4.2 3.3 4.3 3.3 3.3 3.6 0.8 B4.8 3.9 4.9 3.9 3.9 4.2 0.9 B5.5 4.5 5.5 4.5 4.5 4.8 B6.3 5.8 7.1 20.000 5.8 5.8 6.1 20.000 25.0 17.5 59.00 4.20 57.45 2.65 15.870 22.0 18.5 58.10 3.30 0.6 1.0 12.700 17.3 19 15.870 12.700 How to Order: Ref: PRESTAUTO Screw=B3.5 => PRESTAUTO-B3,5 37 These units are used to shear and shape holes in metal sheets, to allow a ”twist” or “spiral” in the hole itself, to aid self-threading screws, avoiding the use of standard collar made “tip” ends, which are unreliable. The special shape obtained by these units allows you to have increased tightness with the self-threading screw . It is also possible to manufacture special models, tailored according to customer’s drawings.