Ancor Marine Heat-Shrink Butt Connectors: Wire Gauge & Pack Sizes

Whether you are repairing a marine DC circuit or preparing a new wiring installation, choose a connector rated for the actual conductor sizes. Ancor supplies adhesive-lined heat-shrink butt connectors, step-down versions for unequal wire gauges and mixed-size assortments. This guide compares the exact gauge and pack count of models carried by NewRVParts.

Choose the correct connector design

Same-gauge butt connectors

For joining conductors within the connector's specified AWG range. Match the actual wire size at both ends.

Step-down connectors

Different-sized barrels accept the manufacturer's stated conductors at each end. Confirm the exact combination.

Assortment packs

Mixed sets for repair or maintenance work when more than one wire gauge is involved.

Ancor 309-series butt connector sizes

Ancor's published catalog uses 22–18, 16–14, 12–10 and 8 AWG groups, each with its own package options.

MPN Wire size Pieces Construction
309025 22–18 AWG 25 Same gauge range at both ends
309099 22–18 AWG 100 Same gauge range at both ends
309001 22–18 AWG 250 Same gauge range at both ends
309199 16–14 AWG 100 Same gauge range at both ends
309299 12–10 AWG 100 Same gauge range at both ends
309325 8 AWG 25 Same gauge range at both ends

Step-down connectors for different wire sizes

Ancor's 320-series multi-wire designs specify the allowed size at each end and offer a 4:1 heat-shrink sleeve.

MPN Wire gauge pairing Pieces Design
320125 22–18 to 16–14 AWG 25 Two different specified barrel ends
320225 16–14 to 12–10 AWG 25 Two different specified barrel ends

Multi-gauge assortment packages

MPN Included gauge groups Pieces Pack type
220011 22–18 / 16–14 / 12–10 AWG 75 Mixed gauge sizes
309000 22–18 / 16–14 / 12–10 AWG 250 Mixed gauge sizes

220011: 25 connectors each in 22–18, 16–14 and 12–10 AWG. 309000: 50 in 22–18 AWG, 150 in 16–14 AWG and 50 in 12–10 AWG.

Crimping and sealing basics

Ancor's adhesive-lined heat-shrink connectors use tinned copper conductors and a heat-activated sleeve for moisture protection and strain relief. Use a compatible crimping die and heat tool, follow the installation instructions, and verify the mechanical crimp before shrinking the sleeve.

Wire size matters more than sleeve colour.

The 8 AWG connector has a different barrel size from the 22–18 AWG model even when packaging or colour cues look similar. Also check the manufacturer part number rather than confusing ordinary butt connectors with step-down multi-wire designs.

Ancor marine wiring connectors and kits

Choose a connector below to review the individual product and its availability.

Related marine electrical guides

Marine battery disconnect switches and terminal covers

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