The #8915 Screw Slot Penetration Gage is a precision inspection tool designed to measure slot penetration depth and recess conformity in slotted head screws.

Engineered for compliance with ANSI B107.600 and ASME B18.6.4 / B18.6.5M standards, the 8915 Series verifies slot depth and dimensional consistency in both metric and inch slotted fasteners.

This gage is designed for:

• Slotted machine screws

• Slotted cap screws

• Slotted set screws

• International slotted head fasteners

The 8915 Series provides accurate penetration depth measurement using a dial indicator assembly mounted to a hardened precision ground probe.

Available for:

Metric slot screw sizes M2 through M10Inch slot screw sizes #1 through 1/2 inch

The system ensures proper driver engagement depth, prevents insufficient recess formation, and supports production quality control programs.

SPC-compatible digital indicators are available upon request.

Each gage probe is heat treated, thermally stabilized, and surface treated to maximize wear resistance and extend gage life.

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

The 8915 Series is ideal for production floor inspection, quality labs, and international fastener manufacturing programs.