Swing Set Stuff 4" x 3/8" Nylon Bushing Swing Hanger (Pair) with SSS Logo Sticker Sold in pairs Rust resistant Comes with sss logo sticker Total shaft length is 3 5/16 (swing set equipment is rounded to 4) this fits a 4x4 beam that actually measures 3  x3  in hardware store The diameter of the thread is 3/8 For a total measurement of 4x 3/8