*PLUMBERSSTOCK EXPERT* responded:
Hi! Thank you for your interest in our Moen 115018 Part Handle Monticello Lever. With regards to your question about the diameter of the bolt, it inflates towards the end. The largest point is .83 inch and the skinniest part is .50 inch. If this is what you're looking for, just click the "Add to Cart" button, enter your postal code, and you'll be all set. Please sign-up for our newsletter to enjoy our exclusive offers and discounts. Thank you for visiting PlumbersStock.com! Have a great day!