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Sometimes you just need to step up the program and use a big old Hex Cap. These babies have got the heft that you are looking for in marine grade 18-8 Stainless Steel so it will be able to resist corrosion. Remember that Stainless Steel will sometimes Gall (seize) when tightened under load -- especially with larger size fasteners like Hex Caps. To prevent this apply a dab of Anti-seize compound before tightening the nut.
Note:1/4 Imported Hex Caps will be fully threaded up to (including) 1/4-20 x 1. Anything longer will have approximately 1 in. of thread.
November 30, 2009
I am using these for all the connections on adjustable solar panel frames on my roof in Hawaii. They work great!
April 21, 2009
I used these bolts and T-nuts in S/S to bolt rock holds on a swing set rock wall. They worked out great and will last a long time.