View cart “591-08 Side Port Control” has been added to your cart. 591-42 Retaining Ring$3.50 591-42 Retaining Ring quantity Add to cart Category: TB591 Adhesive Spray Gun Description Description Replacement Retaining Clip Related products 591-26A Air Valve Assy. $19.95 Add to cart 591-41 Packing Screw $2.50 Add to cart 591-09 O Ring $4.50 Add to cart 591-14A Air Bushing Assy. $36.95 Add to cart