Overview Reviews Product Description Jam Nut 5/8-18 OEM Numbers are used for reference only. California Residents only WARNING: Cancer and/or Reproductive Harm - www.p65warnings.ca.gov Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × Commercial Parts Groen 143123 - Jam Nut 5/8-18 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Review Subject *Comments