An exposed marine battery terminal or high-current stud can need a protective cover, but not every PVC cap is sized for the same cable or connector. Sea-Dog offers two wing-nut terminal-cover sizes, two red stud caps, and a separate positive/negative terminal set. Use the original hardware measurements to identify the right replacement.

Identify the original battery connector

Check cable gauge, connector type and shape. The manufacturer dimensions A, B and D refer to locations on the original technical drawings, not automatically the battery-post diameter.

Exact MPN Component Cable size Manufacturer dimensions
415110-1 PVC terminal covers 4, 2 and 1 AWG A ½ in; B 1⅝ in
415115-1 PVC terminal covers 1/0 and 2/0 AWG A ⅝ in; B 1⅝ in
415194-1 Insulating stud cap 8 to 2 AWG A 2 3/16 in; D 5/16 in
415196-1 Insulating stud cap 2 AWG to 2/0 AWG A 3 1/16 in; D 9/16 in
415210-1 Die-cast lead wing-nut terminals Not a cable cover Positive/negative battery post sizes differ
Different components: 415110-1 and 415115-1 are red/black wing-nut terminal-cover pairs in two cable size ranges; 415194-1 and 415196-1 are individual red stud-style insulating caps. 415210-1 supplies actual positive/negative wing-nut terminals in die-cast lead. Do not confuse the catalog case pack with the quantity sold in an individual listing.

How to identify the existing part

  1. Disconnect the battery system following the equipment manufacturer's safe isolation procedure before handling terminals.
  2. Determine whether the original connection uses a marine wing-nut battery terminal or a standalone high-current stud on another component.
  3. Read the wire gauge and compare it with the intended cover entry: AWG 4/2/1, 1/0–2/0, AWG 8–2 or AWG 2–2/0.
  4. Check the stud and post geometry against Sea-Dog's original A–D dimension drawing; a similar-looking red cap can be a different size.
  5. Check polarity and mounting clearance, and ensure the cover stays in place without straining the cable or preventing a secure connection.

For manufacturer measurements, see the wing-nut battery terminal-cover chart, stud-cap chart and terminal-set drawing.

Exact catalog part-number matches

Open each UsedRVParts listing to confirm its stated condition and stock. Kelowna viewing and pickup are by appointment.

Related marine electrical parts

For correctly rated circuit protection, see our Sea-Dog AGC fuse-holder identification guide. Insulating covers protect against accidental contact; they do not replace a properly sized fuse or circuit breaker.

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