View cart “591-01 Retaining Ring” 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 591-01-1 Air Cap Clip $2.95 Add to cart 591-26A Air Valve Assy. $19.95 Add to cart 591-40 Packing $3.50 Add to cart 591-43 Trigger $6.50 Add to cart