NA-16 Notch Defect Test Bar                  

NA-16 Notch Defect Test Bar the NA-16 Notch Test Bar complies with the requirements of MIL-STD-271E and F (Ships), paragraph 4.3.1.2, and NAVSEA-TB-T9074-AS-GIB-010/271. The procedure specifies an inspection with the ability to detect the smallest rejectable surface defects, artificial or natural, in a test specimen. For the inspection of welds, the magnetic particle inspection procedure shall have the proven ability to detect a 1 ⁄16-inch long by 0.006 inch wide by 0.020 inch deep notch (maximum dimensions) oriented 90 degrees to the magnetic flux. The notch shall be cut in a 3 ⁄8-inch low alloy steel plate, and shall be filled flush with a non-conducting material, such as epoxy, to prevent mechanical holding of the indication medium.

Notch Size - .0625” (1.59mm) Long X 0.006” (0.15mm) Width X 0.02” (0.51mm) Deep