These speaker mounting studs were used on countless amps of the 50’s, 60’s 70’s and beyond. Each screw is a #8-32 machine screw with #10 reverse wood screw thread. The reverse threaded section screws into the baffle wood and won't loosen as you tighten the opposing nut.
Package of 4 screws with 4 keps nuts.
Tech's notes: "These are great for baffles up to 3/4" thick. Tricky to install, but they make it tremendously easy to swap speakers in and out."
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I highly recommend these if you're building speaker cabinets or will be building a cabinet in the future. They work so well. The thread that screws into the wood is left hand thread - counter-clock wise so they'll never be screwing out while you're tightening your speaker nuts. So easy, so quick, so perfect.