11-18-2021, 01:06 PM
Tom, not unless someone has a set stashed away somewhere. The 12 point set I have, I got from Terry Ives he had them put away and I bought 'em. Dave Bonbright doesn't have any for sale, and I imagine anybody who has any is keeping them for themselves. My Bonbright 610 and my Libberton have them, and thank goodness they can be reused. I remember when I could call Engine Masters (Bonbright) and get a set any time. Jeff K. at K Precision advertises a high strength screw, but one of the guys I know had the head pop off one of them on the workbench when it was just barely tight. Most socket heads are 170KSI tensile, but Unbrako screws are 180KSI, so maybe you can find a box of these. Don't torque them past 90 inch-pounds. If someone has a better solution, please post it! I keep hearing of a screw that the Bennett folks have, but I don't know any more about those. I'm retired from aerospace now, so I'm out of that loop. Ted