Sparex source: https://us.sparex.com/hex-nut-thread-size-1-3-course-din-or-standard-no-tensile-strength-164354.html Product: Hex Nut, Thread Size: 1/3'' Course (din Or Standard No.tensile Strength - Sparex S.164354 SKU: S.164354 Detail enrichment pending: OEM cross references, fitment, catalog pages, and full specifications.