The Connector Gage Company SMA-4MF-SPD is a precision dial indicator comparator designed to verify critical interface dimensions of SMA male and female connectors. This gauge ensures proper mating geometry and signal integrity in RF and microwave applications by confirming that connector physical tolerances meet specification. Dimensional verification prevents VSWR degradation, return loss increases, and damage to mating connectors or test equipment.
## Technical Specifications
• **Connector Type:** SMA (SubMiniature version A)
• **Measurement Principle:** Dial indicator comparator; zeroed against master gauge to measure deviation from nominal dimensions
• **Measured Parameters:** Center pin depth relative to outer conductor mating plane; dielectric position
• **Acceptable Pin Depth Range:** −0.003 inches to +0.003 inches
• **Measurement Accuracy:** Better than ±0.00025 inches (±0.00635 mm)
• **Indicator Resolution:** 0.0005-inch increments
• **Construction Material:** Stainless steel
• **Standards Compliance:** MIL-C-39012 (Class 2 and standard test connectors); MIL-STD-348
## Key Features
• Measures both male and female connector interface geometry
• High-resolution dial indicators enable detection of out-of-spec features
• Interchangeable gauge head assemblies for different measurement types (pin depth, dielectric position)
• Master gauge included for zeroing and calibration verification
• Stainless steel construction provides dimensional stability and wear resistance
• Supplied in protective carrying case
## Typical Applications
• Production checkout and connector assembly verification
• Incoming inspection of purchased SMA connectors
• Quality control and process monitoring
• General laboratory dimensional verification
## Compatibility & Integration
The SMA-4MF-SPD is engineered specifically for SMA connector interface verification and operates in accordance with MIL-STD-348 dimensional standards.
