Sparex source: https://us.sparex.com/hex-nut-thread-size-5-8-din-or-standard-no-tensile-strength-132106.html Product: Hex Nut, Thread Size: 5/8'' Din Or Standard No.tensile Strength - Sparex S.132106 SKU: S.132106 Listing note: SAE J995, Grade 8, Zinc Yellow, Pack Quantity: 50 pcs. Detail enrichment pending: OEM cross references, fitment, catalog pages, and full specifications.