Parameters: Thread: #8-32; Measurement System: US; Length: 3/8"; Material: Alloy Steel; Color: Black; Drive Slot: Hexagonal; Application: Suitable for locking female threads of the same specification, TV, computer, projector, printer, toy, equipment, model airplanes, etc.; Strength: 10.9 grade high-strength screws, countersunk head can be locked in, flush surface, beautiful, high torque drive hexagonal slot, strong. Note: When purchasing, you must check the screw, hole thread, and thread parameters to be consistent before locking. Packing quantity: 20pcs