The types of lead screws based on their thread geometry are square threads, acme threads, trapezoidal threads, and buttress threads. Lead screws may be created by a thread rolling or simply a thread whirling course of action. Tamper Resistant Hex- Tamper-resistant hex drives are tamper resistant with a little pin https://types-of-roof-material49269.glifeblog.com/28783671/types-of-screw-heads-no-further-a-mystery