Copper Nut with large Flange - for applications with high temps. These are not locking. Flange diameter is 22mm (approx 3/4") - R&R with a 15mm socket or wrench. Stud/bolt size is 10mm. Comparison photo shows the m10 nut next to the m8 nut.
These are $1.80 each or $85.00 for the lot of 66pc ($1.29ea)