#9055 Hexagon GO-NOGO Gage
The #9055 Hexagon GO-NOGO Gage is a precision production inspection tool designed to verify internal hex recess size and functional driver fit in socket head cap screws, shoulder screws, set screws, and hex keys.
Manufactured in accordance with ASME/ANSI B18.3 standards, the 9055 Series provides rapid functional size verification using precision ground GO and NO-GO plug ends.
This gage confirms:
• Acceptable internal hex recess size• Proper Allen key engagement• Compliance with ASME B18.3 tolerances• Production line quality control
The GO end verifies minimum functional engagement.The NO-GO end confirms the recess does not exceed maximum allowable size limits.
Designed for high-volume manufacturing environments, the 9055 Series enables fast, repeatable inspection without indicator measurement equipment.
Ideal for:
• Socket head cap screw manufacturing• Set screw production• Shoulder screw inspection• Hex key manufacturing• In-process production control
Each gage is heat treated, thermally stabilized, and surface treated for maximum wear resistance. All gage probes are calibrated to specified dimensions and tolerances and are traceable to the National Institute of Standards and Technology (NIST).
The 9055 Series delivers dependable, production-ready hex recess verification.
1) Standard References
Configuration: Hexagon GO / NO-GO Recess GageStandard Reference: ASME / ANSI B18.3Drive Type: Internal HexagonCalibration: NIST TraceableSystem Compatibility: ISO 9001 Quality Systems
2) Inspection Function
The 9055 Series provides functional size verification:
GO End• Confirms minimum acceptable recess size• Ensures proper driver engagement
NO-GO End• Confirms recess does not exceed maximum tolerance• Prevents oversize condition
This gage verifies recess size and form compliance, not penetration depth.
3) Materials & Construction
Universal’s 9055 Series gages feature:
• Hardened precision ground hex plug ends• Thermally stabilized tool steel• Surface-treated wear-resistant finish• Clearly marked GO and NO-GO ends• Production-durable design
Designed for repeated use in high-volume manufacturing environments.
4) Ordering Information
When ordering, specify:
• Hex size• Certification package if required
All gage probes are calibrated to specified dimensions and tolerances and are traceable to NIST standards.
