These rivets are available in dome head 1601 (1693) or countersunk head 1604 (1682), with steel stem and aluminum body. 1601 Series dome head aluminum rivet with zinc coated steel mandrel. 1604 series 120 deg countersunk aluminum rivet with zinc coated steel mandrels. 1/8″ diameter has 165 lb shear, 230# tensile. 5/32″ diameter has 255# shear, 375# tensile. 1601 and 1604 series stocked when 1693 and 1682 stock depleted.