Rubber vacuum caps provide a secure, airtight seal on unused vacuum ports and fittings in automotive and machinery applications. This 3/16″ cap is ideal for blocking off lines during diagnostics, service, or custom modifications where vacuum lines are no longer in use.

Specifications & Features

• Inner Diameter: 3/16″
• Material: Durable automotive-grade rubber
• Application: Seals off unused vacuum lines and ports
• Resists cracking, hardening, and heat degradation
• Ideal for emissions system repair, custom vacuum routing, and intake modifications
• Ensures a tight, leak-free seal even under engine heat and vibration