Small Test Probe According to UL 498 Figure 139.1

This Small Test Probe According to UL 498 Figure 139.1 is precision-crafted to verify the structural and dimensional compliance of plugs and sockets with UL 498 standards, specifically adhering to the requirements of Figure 139.1. It features strict conformity to standard specifications for dimensions, tolerances, material properties, and surface finish, with excellent dimensional stability and reliable performance to support accurate electrical component inspection.

Specifications:
• Applicable standard: UL 498 “Attachment Plugs and Receptacles” (Figure 139.1)
• Probe diameter: 0.031±0.002 In.
• Corner radius: 0.002 In.
• Overall length: 2.00±0.010 In.
• Material hardness: ≥50HRC
• Material thermal expansion coefficient: Small, ensuring stable dimensions and tolerances
• Dimensional tolerances: Compliant with UL 498 standard requirements
• Surface roughness: Meets UL 498 specified criteria

Test Procedures:
• Check the test probe for cleanliness, no physical damage, or dimensional anomalies before use.
• Secure the plug or socket under test in a fixed fixture to avoid displacement during inspection.
• Align the probe with the target testing position of the product as specified in UL 498 Figure 139.1.
• Perform the structural and dimensional inspection by guiding the probe through the relevant features of the test sample.
• Verify if the product’s structure and size align with the tolerances and specifications outlined in UL 498.
• Document the test results and confirm whether the product meets the standard’s compliance requirements.

Applications:
• Structural and dimensional inspection of plugs and sockets to ensure compliance with UL 498 standards.
• Quality control processes in the electronics and electrical appliance manufacturing industries.
• Conformity testing for plug and socket products on production lines and in workshops.
• R&D testing for optimizing the design of plug and socket components.
• Compliance verification in third-party testing laboratories and certification institutions.

SM390 Small Test Probe According to UL498 Figure 139.1