Unslotted HI-Hex washer shoulder Pole Grip HI-LO Type 17 Full Thread 1,000hr Salt Spray

An externally threaded steel fastener with an integrally formed hex washer head screw whole head is 10-20% higher than a standard hex washer head. The thread pattern has a double lead, consisting of a high and low thread. The lower thread diameter is approximately 80% that of the higher thread. There is a chip cavity cut out of the final several threads, ending with a tip that has a piercing point. Beneath the head is an under-thread shoulder