Sparex source: https://us.sparex.com/levelling-box-yoke-3-4-unc-11316.html Product: Levelling Box Yoke - 3/4 UNC - Sparex S.11316 SKU: S.11316 Listing note: Thread length: 125mm, Length : 381mm, Fork Hole ø mm: 16mm, Width Internal: 50mm, Width Ext.mm Detail enrichment pending: OEM cross references, fitment, catalog pages, and full specifications.