The #9048 Tri-Slot GO / NO-GO Gage is a precision driver verification tool designed for Tri-Slot three-wing ribbed recess fasteners manufactured to NAS4000 standards.

Tri-Slot recess systems are engineered for aerospace applications requiring high torque transmission, secure engagement, and resistance to cam-out. Proper driver geometry is critical to ensure assembly reliability and structural performance.

The 9048 Series provides functional GO and NOT GO inspection to verify driver conformity to NAS4000 dimensional tolerances.

The GO end verifies acceptable minimum engagement geometry.The NOT GO end ensures the driver does not exceed maximum allowable dimensional limits.

Available sizes:

9048-060 – Dash 0 – Size 0

9048-086 – Dash 1 – Size 1

9048-112 – Dash 2 – Size 2

9048-138 – Dash 3 – Size 4

9048-164 – Dash 4 – Size 6

9048-190J – Dash 4J – Size 8

9048-190 – Dash 5 – Size 10

9048-250 – Dash 6 – 1/4

9048-312 – Dash 7 – 5/16

9048-375 – Dash 8 – 3/8

9048-437 – Dash 9 – 7/16

9048-500 – Dash 10 – 1/29

048-562 – Dash 11 – 9/16

9048-625 – Dash 12 – 5/8

9048-750 – Dash 13 – 3/4

9048-875 – Dash 14 – 7/8

9048-100 – Dash 15 – 1

The 9048 Series is ideal for:

• Aerospace fastener manufacturers

• Defense contractors

• Aviation OEM assembly

• MRO facilities

• Quality inspection laboratories

Gage probes 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 9048 Series ensures precise Tri-Slot driver conformity verification in compliance with NAS4000 aerospace standards.