Part Number Conduit Size (Inches) 80500-G 1/2" 8075-G 3/4" 8100-G 1" 8150-G 1 1/2" 8200-G 2" 316 Stainless Steel Locknuts can be used with conduit or NPS threaded pipe. Precision-machined threads allow for easy installation. Heavy stock thickness and specially designed tabs tighten securely and will not easily loosen even in the most severe applications.