Ancor 310403 Marine Grade Heat Shrink Ring Terminal 22-18 AWG 1/4" 3-Pack

The Ancor 310403 is a Marine Grade heat shrink ring terminal designed for 22–18 AWG wire with a 1/4" stud size, sold in a convenient 3-pack. Built from pure tinned copper with a cross-linked polyolefin heat shrink sleeve, these terminals deliver a watertight, corrosion-resistant crimp connection ideal for marine, automotive, and powersports electrical systems.

The adhesive-lined heat shrink tubing is the defining feature of this terminal. When heat is applied, the sleeve shrinks to one-third of its original size while the built-in adhesive melts and flows to form an impervious seal against salt water, oil, acids, gasoline, and UV exposure. This creates both a weatherproof barrier and critical strain relief at the connection point.

Key Features:

• Wire Range: 22–18 AWG
• Stud Size: 1/4"
• Quantity: 3 terminals per pack
• Cross-linked polyolefin heat shrink tubing — stronger than PVC and flame-resistant
• Heat-activated adhesive lining seals against salt water, oil, acids, and sunlight
• Nylon insulator provides Marine Grade® resistance to UV, water, oil, chemicals, vibration, and cut-through damage
• Shrinks to 1/3 original size at 257°F (125°C)
• Operating temperature range: -40°C to 110°C
• Pure copper construction for maximum current flow
• Tinned copper barrel for superior corrosion resistance
• Brazed seam for maximum mechanical strength
• UL Listed and CSA Recognized

Ancor heat shrink ring terminals are the preferred choice of marine electricians for permanent, vibration-proof connections in demanding environments. The 310403 is part of Ancor's complete line of Marine Grade® adhesive-lined heat shrink connectors.