Metal Fasteners UNC vs Spaced Thread
Overview Metal fastening is designed per the requirements of the American Institute of Steel Construction (AISC): Specification for Structural Steel Buildings in conjunction with the American Architectural Manufacturers Association (AAMA): TIR-A9-14 Design Guide for Metal Cladding Fasteners. Types The two most common types of fastener threads used in construction are Unified Coarse Thread (UNC) more …