View cart “591-02 Air Cap” has been added to your cart. 591-06 Lock Screw$12.50 591-06 Lock Screw quantity Add to cart Category: TB591 Adhesive Spray Gun Description Description Replacement Lock Screw Related products 591-08 Side Port Control $12.95 Add to cart 591-26A Air Valve Assy. $19.95 Add to cart 591-20 Needle $19.95 Add to cart 591-14A Air Bushing Assy. $36.95 Add to cart