Overview Reviews Product Description 4x40 x 3/8 inch Round Head Square/Slot Drive Machine Screw - Zinc Plated Product Videos Custom Field UOM EA Product Reviews Write a Review Write a Review × 4-40X3/8 MACH SCR RND HD COMBO Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *