A graduated one piece wood or metal measuring instrument, used in pattern making. The graduations are adjusted to compensate for the shrinkage of metal casting. The shrinkage of cast metal varies and shrinkage rules are made in various graduations. For combination square "shrink" blades, see blade, combination square.
Classification: Other measuring or checking instruments, appliances and machines, nesoi in chapter 90
NSN 5996-01-213-2335
NSN 6135-00-497-0491
NSN 5945-01-526-3040
NSN 6645-00-209-0420
NSN 5915-00-826-0937
NSN 7035-00-145-9138
NSN 6105-01-249-3365
NSN 5895-00-900-5449
NSN 5895-01-634-0190
NSN 5960-00-466-3523
NSN 6130-00-932-1591
NSN 5925-00-003-4722