A-P7X40-AI Roll Pin, 7 MM x 40 MM, 5 packFive New Aftermarket Replacement Metric Roll Pins, 7 MM x 40 MM Pack of 5 This pack of five 7 MM x 40 MM metric roll pins (also known as slotted spring pins or tension pins) is a versatile hardware fastener used throughout agricultural equipment, construction machinery, lawn and garden equipment, and general farm machinery. Roll pins are hollow, slotted cylindrical fasteners that compress on installation and self lock in place, providing reliable