Superior Technical Ceramics Corp. Hex Head Bolt BOLT 4-40 x 1

Bolt lengths do not include head lengths. Threads are manufactured to "go" gauge conditions. Parts will not meet "no-go" gauge conditions. Due to standard manufacturing methods, stack-up tolerances cannot be controlled on the pitch. It is therefore recommended that the thread depth engagement of the bolt not exceed 5-10 threads. Due to the inherent brittleness of the material, ceramic parts will fail under impact, torque, and tensile forces that exceed the material's limit. Ask for matching Nuts and Washers to accommodate the above bolt sizes.