Classic size - 5 1/2 x 8 1/2 in., 7 holes
No other part numbers with same form, fit, and function found.
NSN 5910-01-454-6089
NSN 6240-01-318-6349
NSN 5985-01-576-2785
NSN 5985-00-289-9862
NSN 6130-00-959-5800
NSN 5996-00-531-5398
NSN 6620-01-519-2628
NSN 5945-01-194-2293
NSN 6130-00-752-8746
NSN 7035-01-158-7673
NSN 5975-01-198-9916
NSN 6135-01-588-4160