According to the US Army document TM-9-4910-430-10 this works for Cummins Diesel engine models H HR NH, HVH, and NF .It looks nice, it might be nos.
Otc Gm Cummins Diesel Compression Test Adapter 6097 unused
Snap-On M3585 Diesel Compression Adapter for Cummins/Case 8.3L C-Series
Lang Tools TU15-75 Diesel Compression Test Adapter Cummins Isb (tu1575)
Compression Test Adapter Tool for 6.7L 5.9L Cummins Diesel Engine Dodge Ram
Snap On Tool , Cummins Diesel Compression Test Adapter
Lang Tools TU-15-26 Diesel Compression Test Adapter Cummins ISB
