At 01:21 PM 6/23/2005, you wrote: > At LEAST one thick washer, and as >many as needed to allow visual inspection to confirm that the nut is >torqued properly, not bottomed out on the threads. > >SEE AC43-13-1B, Section 7-37, which says maximum 1/8 inch of washers, >but no reason stated.
The reason should be fairly obvious. AN bolts come in 1/8" graduations of length. If you need 1/8" (or more) of washers, then you can use the next shorter bolt. With a standard AN lock or castle nut, if no more than three threads are showing above the top of the nut, then the bolt has not bottomed out. Proper thread engagement is ensured if one thread is showing. That differential is approximately the thickness of an AN washer. Don Reid - donreid "at" peoplepc.com Bumpass, Va Visit my web sites at: AeroFoil, a 2-D Airfoil Design And Analysis Computer Program: http://aerofoilengineering.com KR2XL construction: http://aerofoilengineering.com/KR/KR2XL.htm Aviation Surplus: http://aerofoilengineering.com/PartsListing/Airparts.htm EAA Chapter 231: http://eaa231.org Ultralights: http://usua250.org VA EAA State Fly-in: http://vaeaa.org
