Lug Nut Seat Types Diagram - Acorn/Tapered 60°, Mag Seat w/Washer & Ball Seat

This document is a technical illustration comparing the three common lug nut seat styles used on automotive wheels. Three cross-section diagrams show each lug nut type above a corresponding cutaway of the wheel's lug hole, with the mating seat surfaces highlighted in red. The first diagram, labeled 'Acorn/Tapered Seat', shows a lug nut with a 60° conical (tapered) seat and a matching 60° tapered hole in the wheel. The second diagram, 'Mag Seat w/washer', shows a shank-style lug nut with a flat washer that seats against a flat surface on the wheel, with the shank extending into the lug hole. The third diagram, 'Ball Seat', shows a lug nut with a rounded (ball or radius) seat that mates with a matching rounded seat machined into the wheel. From this chart a reader can visually identify which lug nut style matches their wheels, understand that acorn/tapered seats use a 60-degree cone angle, and recognize that mag-style and ball-seat nuts require different wheel seat machining and are not interchangeable with tapered-seat nuts. The document contains no year, make, model, part numbers, or torque specifications — it is a generic reference diagram.