#9455 Precision NAS Protrusion Height Gage System
The #9455 Precision Protrusion Height Gage System is a high-accuracy measurement platform engineered specifically for aerospace and special fasteners requiring NAS-level dimensional verification.
Designed for compliance with ANSI, ASME, ISO, and NAS standards, the 9455 Series utilizes interchangeable precision gage bushings to measure fastener head protrusion and related dimensional attributes.
The system measures gaging bushing hole sizes using the Height Over Ball method and calculates actual certified sizes to ensure traceable and repeatable dimensional verification.
The 9455 Series can be configured to measure:
• Aerospace fastener head protrusion
• Special fastener attributes
• Precision head height dimensions
• NAS series fasteners
• ANSI and ISO fastener geometries
Interchangeable gage bushings are available in both inch and metric sizes.
Bushing dies are manufactured from heat treated high speed steel or carbide to provide long-term dimensional stability and wear resistance.
The system is ideal for:
• Aerospace fastener manufacturers
• Defense contractors
• Aircraft assembly facilities
• Certified aerospace quality laboratories
• High-precision dimensional inspection departments
PRIMARY SYSTEMS
9455-00
Precision NAS Protrusion Height Gage (2.5 mm)
9455-06
Insert Gage Plate – 6 Bushing Station
INTERCHANGEABLE COMPONENTS
9455-##
Interchangeable Gage Bushing Dies
NAS526, NAS9800
Styles #1, #2, #3, #4
INDICATORS
543-552
Mitutoyo Digimatic IndicatorRange 1 inch / 25.4 mmResolution .00005 inch / 0.001 mm
543-472
Mitutoyo Analog & Digimatic IndicatorRange 1 inch / 25.4 mmResolution .00005 inch / 0.001 mm
DATA ACCESSORIES
904338
Cable – 1 meter
264-504
Digimatic Mini Processor SPC Recorder
1) Standard Compliance
NAS Aerospace Standards
ANSI
ASME
ISO
Measurement Method: Height Over BallInspection Type: Precision Protrusion Verification
2) Inspection Function
The 9455 Series is used to:
• Verify aerospace fastener protrusion height
• Confirm NAS head geometry compliance
• Perform certified height over ball measurement
• Maintain dimensional conformity in aerospace manufacturing
The height over ball method provides a highly accurate and repeatable measurement reference for precision fastener geometry.
3) Materials & Construction
Universal’s 9455 Precision System features:
• Rigid steel base and column
• Thermally stabilized structural components
• Heat treated high speed steel bushings
• Optional carbide bushings for extended wear
• Precision ground insert plates
• Aerospace-grade measurement accuracy
Designed for laboratory-grade dimensional inspection.
4) Accuracy & Resolution
With Mitutoyo Digimatic indicators:
Resolution: .00005 inch / 0.001 mm
Measurement Range: 1 inch / 25.4 mm
Engineered for ultra-fine aerospace dimensional verification.
5) Calibration & Traceability
Available with:
• NIST traceable calibration
• Long form dimensional certification
• ISO/IEC 17025 accredited calibration options
• Aerospace documentation packages
