Company item name--optical level and s
No other part numbers with same form, fit, and function found.
NSN 5855-01-508-4654
NSN 4140-01-276-2436
NSN 5920-01-010-3293
NSN 7035-00-763-6180
NSN 5950-01-057-1691
NSN 5975-00-031-2871
NSN 5835-00-034-4976
NSN 5915-00-100-4299
NSN 5855-00-323-0967
NSN 6135-01-247-5660
NSN 6135-00-235-1938
NSN 5985-01-197-7905