The SL31C-13 stud is an aircraft-grade threaded fastener used in Continental-compatible piston engine assemblies. It is a double-ended stud with 5/16-18 UNC thread specification, designed to be installed into an engine case or component to provide a fixed threaded mounting point for nuts, brackets, or accessories.

It is used in engine structural and accessory mounting locations where repeated disassembly is required without wearing out threaded holes in the engine case.

Key features include:

PMA aircraft engine stud fastener
Diameter: 5/16 inch (.3125”)
Length: 1.63 inches
Double-ended threaded stud design
Precision-machined steel construction
Provides reusable threaded mounting point in engine assemblies
Designed for high vibration and cyclic load environments
Prevents wear on engine case threaded holes
Compatible with Continental piston engine configurations (IPC-dependent use)
Used in engine assembly, accessory mounting, and overhaul procedures