It's called a adapter kit for a 2.0 cmu mount fixture
NSN 6645-01-410-8905
NSN 6240-01-050-5755
NSN 5985-01-065-3077
NSN 4140-01-118-8436
NSN 5998-00-936-1761
NSN 5925-00-936-8096
NSN 5920-01-377-8571
NSN 5998-00-140-1638
NSN 2925-01-233-8545
NSN 6620-00-774-3638
NSN 5910-01-614-1667
NSN 6145-00-390-0755
Last Updated: 04/20/2024