I just ran a test of the 10-32 low profile socket head capscrews that are often used in strength upgrades, like Carson mentioned. I only used 2 screws instead of three because of the 4000 pound force limit of the test set-up.I am glad to report that the two 10-32 screws are still holding at 4000 pounds. Assuming that three screws would hold 6000 pounds, that equates to a fill pressure (without safety factor) of over 13,000 psi without failure. Deduct for safety factor and that still gives a very decent working pressure. Lloyd-ss
WOO HOO !!!!.... That's great news, Lloyd....Any sign of distortion in the pocket in the tube?.... That would be the most likely thing to yield with those screws by my calculations.... Are you using a Crosman tube or CrMoly?....Bob
Great experiment Lloyd, thanks for sharing.87ksi for an unrated machine screw in shear is very impressive. Tom
So changing to the 10-32 screws and staying at a 2000psi fill is just extra piece of mind?Thanks Lloyd This is very educational especially the visual.Tommy