100-  M10-1.5 A4 60  316 STAINLESS STEL   Nylon Insert Lock Nut  17mm Wrench

The “A4-60” marking on a nut provides specific information about the fastener. Let’s break it down:

·         A4: This represents 316 stainless steel, which is a corrosion-resistant material commonly used in marine and harsh environments.

·         60: The number after A4 indicates the tensile strength of the bolt. In this case, A4-60 corresponds to a tensile strength of 700 MPa, making it a marine-grade stainless steel nut¹².