#9019 Type III Square Test Blocks

The #9019 Type III Square Test Block is a master reference standard designed to verify and monitor inspection systems used for Type III square drive fasteners and driver tools.

Manufactured in accordance with ASME B18.6.3 and B18.6.5M standards, the 9019 Series provides dimensional reference verification for square recess inspection equipment.

Test blocks are used to validate and monitor performance of:

• Penetration gages

• Plug gages

• GO / NO-GO ring gages

• Driver inspection systems

Each test block features a precision ground Type III square recess manufactured to tightly controlled dimensional tolerances.

Available sizes:

9019-00 – Size 00

9019-0 – Size 0

9019-1 – Size 1

9019-2 – Size 2

9019-3 – Size 3

9019-4 – Size 4

The 9019 Series serves as a master calibration artifact within quality control environments requiring consistent inspection verification.

Ideal for:

• Fastener manufacturers

• Driver tool producers

• Construction hardware suppliers

• Industrial OEMs

• Calibration laboratories

All test blocks are heat treated, thermally stabilized, and surface treated to maximize wear resistance and dimensional stability.

Long form calibration certificates provide dimensional verification and traceability to the National Institute of Standards and Technology, NIST.

The 9019 Series ensures repeatable inspection confidence across all Type III square drive verification systems.