[Morris]

This is the bolt we went to

NAS 624/MS 21250 SERIES: 12 POINT EXTERNAL WRENCHING BOLTS
These fine-threaded, twelve-point head bolts have a minimum tensile strength of 180,000 psi and a minimum shear strength of 108,000 psi. Thread length is consistent within each diameter and standard grips are in 1/8” increments beginning at 1/8”. These bolts also have a large radius between the bolt head and shank for additional strength. This requires the use of the MS 20002C series beveled washer under the head. A “Superbolt” for the most demanding applications. Please note that odd number grips, i.e. –15, –23, etc., are not standard and may not always be available. Please inquire for specifics.