View cart “591-23 Replacement Fluid Needle Spring” has been added to your cart. 591-44 Stud$3.50 591-44 Stud quantity Add to cart Category: TB591 Adhesive Spray Gun Description Description Replacement Stud Related products 591-02 Air Cap $29.95 Add to cart 591-14A Air Bushing Assy. $36.95 Add to cart 591-24A Replacement Needle Bushing Assembly $29.95 Add to cart 591-01-1 Air Cap Clip $2.95 Add to cart