Material: Alloy steelThreaded models have fast double lead threadsExtensions available for threaded models to accommodate thicker flanges: 2 7/8 in Stud #0501, 4 1/2 in Stud #0503, Coupling #503-EXSetMaterial: Alloy steelThreaded models have fast double lead threadsExtensions available for threaded models to accommodate thicker flanges: 2 7/8 in Stud #0501, 4 1/2 in Stud #0503, Coupling #503-EXFlange Wizard® Alloy Steel Two Hole Pin, For Flanges With Holes Up To 1-15/16 in (Dia)http://s7d5.scene7.com/is/image/Staples/s0482991_sc7?$std$http://s7d5.scene7.com/is/image/Staples/s0482991_sc7?$thb$http://www.staples.com/sbd/img/res/ic/ic016-deliveryreq.gifhttp://s7d5.scene7.com/is/image/Staples/s0482991/Flange-Wizard-Alloy-Steel-Two-Hole-Pin-For-Flanges-With-Holes-Up/product_776867Flange Wizard® Alloy Steel Two Hole Pin, For Flanges With Holes Up To 1-15/16 in (Dia)0.00