UNF – Hexagon Head Bolts & Set Screws – Zinc Plated
Hex head fasteners have a hexagonal / six sided head.
SAE Grade 5 fasteners have a proof load of 85,000 psi, A yield strength of 92,000 psi and a tensile strength of 120,000 psi
Threads lengths will vary according to the individual bolt sizes and dimensions. ISO standards for threads are: length is twice the diameter of the bolt plus 1/2 inch.