BaerCoil Thread Insert UNF - 1 1/2 x 12 - 1.5 X DBaerCoil UNF thread inserts are precision engineered fasteners designed to reinforce and repair threaded holes in high stress assemblies. Crafted from austenitic stainless steel (AISI 304) with a tensile strength of at least 1400 N mm2, this insert is sized for a 1 1 2" major diameter and 12 threads per inch, with an overall length of 1. 5 times the diameter (approximately 2. 25 inches). Thread Size: UNF, 1 1 2" major diameter, 12 TPI Length: 1. 5 D