View cart “591-31A Air Inlet Assy.” 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 591-23 Replacement Fluid Needle Spring $5.95 Add to cart 591-31A Air Inlet Assy. $9.95 Add to cart 591-06 Lock Screw $12.50 Add to cart 591-09 O Ring $4.50 Add to cart