Polaris AL300N-38 300 MCM Al Compression Lug, 3/8 IN 2 Hole, 1 IN Spacing
https://nsiindustries.com/product/300-mcm-al-compression-lug-3-8-2-hole/
Provides reliable termination for copper code or aluminum conductors in switchgear, panelboards, and power distribution equipment. Two mounting holes with NEMA spacing provide secure mounting and alignment.