UL 498 Figure 136.2 Large Test Probe

This UL 498 Figure 136.2 Large Test Probe is precision-engineered to verify structural and dimensional compliance of plugs and sockets with UL 498 “Attachment Plugs and Receptacles” standard requirements, specifically conforming to Figure 136.2 specifications. The instrument features strict adherence to standard specifications for critical attributes including dimensional tolerances, material properties, and surface finish characteristics. Constructed from high-hardness tool steel with minimal thermal expansion coefficient, it ensures stable, reliable performance during electrical component inspection procedures.

Specifications

• Applicable standard: UL 498 “Attachment Plugs and Receptacles” (Figure 136.2)
• Material: Tool Steel
• Rockwell hardness: C58 to C60
• Radius (R): 0.125 in ± 0.005 (3.175 mm ± 0.127 mm)
• Key diameter (1): 0.030 in ± 0.002 (0.762 mm ± 0.0508 mm)
• Key diameter (2): 0.060 in ± 0.001 (1.524 mm ± 0.0254 mm)
• Angle: 45°
• Length segment: 0.150 in ± 0.005 (3.81 mm ± 0.127 mm)
• Overall length: 1.00 in ± 0.030 (25.4 mm ± 0.762 mm)
• Material thermal expansion coefficient: Minimal, ensuring dimensional stability
• Dimensional tolerances: Compliant with UL 498 standard requirements
• Surface roughness: Meets UL 498 specified criteria

Test Procedures

1. Inspect the test probe for cleanliness, visible damage, or dimensional irregularities prior to use.
2. Secure the plug or socket under test in a stable fixture to prevent displacement during inspection.
3. Align the probe with the designated testing position as specified in UL 498 Figure 136.2.
4. Conduct structural and dimensional inspection by guiding the probe through relevant features of the test sample.
5. Verify product structure and dimensions against UL 498 tolerance and specification requirements.
6. Document test results and confirm product compliance with standard requirements.

Applications

• Structural and dimensional inspection of plugs and sockets for UL 498 standard compliance verification
• Quality control processes in electronics and electrical component manufacturing facilities
• Laboratory testing and certification procedures for electrical connectors
• Production line inspection and acceptance testing of attachment plugs and receptacles