Will not corrode or rust. Titanium HL1012AZ6-4 Hi-Lok Protruding Shear Head Pins/Bolts in new surplus condition. Titanium is. Grip Length: 1/4”. Hi-Lok Pins are tightened from the thread end by using an Allen/Hex wrench holding the Hi-Lok Pin/Bolt by the Allen wrench hole and tightening the nut with a ratchet wrench.