Blue Sea Systems Stud Mount Insulating Boots, 5/16 in and 3/8 in Studs, Press-Fit, 2pk

Overview

The Blue Sea Systems 4000 is a 2-pack of red stud mount insulating boots for covering exposed conductive posts and studs on battery switching and power distribution hardware. The press-fit opening fits 5/16 in. (M8) and 3/8 in. (M10) posts and studs, which makes it suitable for many common marine DC connection points.

These boots are commonly used on ML-Series Remote Battery Switches, solenoids, Automatic Charging Relays, battery terminals, power posts, bus bars, and similar stud-mounted connections. On board, they help tidy up exposed high-current connection points in battery compartments, consoles, and service spaces where accidental contact is more likely during installation or maintenance.

This product is intended for use with insulated ring terminals and lugs. That makes it a practical match for boat owners and installers who want a straightforward cover for stud connections without changing the existing switch, relay, or distribution hardware.

Key features

• 2-pack of red insulating boots for conductive posts and studs
• Press-fit design fits 5/16 in. (M8) and 3/8 in. (M10) posts and studs
• Suited to ML-Series Remote Battery Switches, solenoids, Automatic Charging Relays, battery terminals, power posts, bus bars, and similar marine DC hardware
• Made for use with insulated ring terminals and lugs
• Red color makes covered connections easier to identify during service work

Compatibility and fit

Fit is based on stud size and terminal style. If the connection uses a 5/16 in. or 3/8 in. stud and an insulated ring terminal or lug, this boot is the correct type of cover for that stud connection.

It is a good match for battery bank wiring, charging relay installations, and other high-current DC distribution points where exposed studs need a cleaner finished cover. This is especially useful in tight rigging areas where cables, tools, and hands move around energized hardware.

Installation and use

The press-fit shape keeps installation simple when building a new wiring run or cleaning up an existing battery switch or bus bar layout. Because the boot is used at the connection point itself, it works across many marine electrical setups as long as the stud diameter and insulated terminal style match.

What’s included

• 2 red stud mount insulating boots