3020-00-741-2877 (2285422)
NSN 3020-00-741-2877 (NIIN 00-741-2877) is a helical gear in Federal Supply Class 3020, Gears, Pulleys, Sprockets, And Transmission Chain — a gear, cylindrical in form, with teeth on the outer surface at an angle to the axis of the gear. Manufacturer part number 2285422 (General Motors LLC, CAGE 7X677); also referenced as 7412877 (U S Army Tank Automotive Command).
Key specs: single helix; 85 to 95 rockwell b body hardness; 45 to 50 rockwell c teeth hardness; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required); export Schedule B 8483.40.9000.