300pc Assorted Roll Pins Box - Metric Spring Tension Pins, 2.5-8mm

300pc Assorted Box of Roll Pins - 300 metric spring roll pins, also called tension pins, in eight diameter and length combinations from 2.5mm up to 8mm.

A roll pin is spring steel formed into a tube with a gap down its length. Driven into a hole slightly smaller than itself it squeezes closed and grips by spring pressure, which is why it holds in a hole that is worn or slightly out of line where a solid pin would either drop straight through or refuse to start. Driven in with a pin punch and driven out the same way.

Box contents (300 pieces total)
55 x 2.5 x 24mm
55 x 2.5 x 40mm
45 x 3 x 40mm
40 x 4 x 40mm
35 x 5 x 40mm
25 x 6 x 40mm
25 x 8 x 24mm
20 x 8 x 55mm

Type
Spring roll pin (tension pin), spring steel, metric

Please note
Drill the hole to the pin's nominal diameter - a 6mm pin goes into a 6mm hole, because the pin is made oversize and compresses as it is driven in. Fitted and removed with a pin punch.

Suitable for
Machinery assembly and repair, gears, levers and linkages, shafts and hubs, agricultural and plant equipment, motorcycles and small engines, general engineering

Also known as tension pins, spring pins, slotted spring pins, or a roll pin assortment box.