Moral gray area with skipping checks on a big order

I was running a batch of parts for a client who needed them fast. My boss told me to skip the final check to meet the deadline. I know if the sizes are off, the parts could break in use. Speaking up might slow things down and lose us the job. I did a sneaky quick measure on my own, which felt kind of bad. How do you handle it when you're pushed to rush through quality steps? Ever been in this spot?