Thin nyloc nuts have the same features as standard size nyloc nuts and weigh up to 50 percent less. Nylon insert allows nut to be installed and removed many times, without damaging threads. Sold in packages of ten.Nyloc Nuts, 5/8"-18 RH Availability: Usually ships the next business day 18240-10$7.99 Don't see what you want? .......... Need help? Or, IF THERE IS NO ORDER BUTTON AVAILABLE on the part you want to buy, please call us TOLL FREE at 1-888-6 GO FAST(1-888-646-3278) Monday - Friday 8AM - 4:30PM Pacific Time and talk to one of our experienced Sales Agents. Some parts may not be legal for sale or use in California and other states on any polution controlled motor vehicles. Check your local laws for use. Copyright © GoFastParts.com all rights reserved. No part of this site may be reproduced without prior written consent.