Xtreme Precision Black Fluted 5/8-24 x 7/8 OD x 5/8 Long Thd Protector CNC Machined Steel Manganese Phosphate...(Parkerized) Buy 10 and get 20% Off.. We Usually Ship Same Day, No more than 2 or 3 Days 7/8 OD x 5/8 Long x 5/8-24 THD