Projecta BT142-N10 Negative Bolt Brass Battery Terminal, Box of 10

Quick answer

The stud is 5/16 inch or 8 mm, so ring lugs need a matching hole.

This is the 10 piece box of negative bolt terminals, handy for workshops restocking the drawer. The stud is 5/16 inch or 8 mm, so ring lugs need a matching hole. The bolt style holds ring lugs firmly with a nut, the usual choice where vibration is a concern.

Forged brass conducts well and copes with the heat and vibration of an engine bay. Positive posts are slightly larger than negative posts, so fit this one only to the negative side.

Clean the post back to bright metal before fitting, and coat the joint once tightened.

Tighten firmly but do not crush the post; a lead post deforms easily. After fitting, a thin smear of terminal grease or spray protector slows corrosion. Keep the positive covered so a spanner cannot bridge it to the body. Measure the post and the cable before ordering; a terminal that is too big for the post will never clamp properly. Check the terminal again after the first week, as new cable can settle under the clamp. Related parts are in the <a href="https://frankiesautoelectrics.com.au/collections/projecta">Projecta range</a>.

Specifications

• Post: negative
• Style: bolt
• Pack: box of 10
• Stud: 5/16 inch or 8 mm
• Material: forged brass

Warranty

This comes with the manufacturer's warranty through the Australian distributor. See the manufacturer's terms for details, plus our guarantees under the Australian Consumer Law.

FAQ

Before I order, does the BT142-N10 box contain 10 of the same negative terminal?

All 10 are negative bolt terminals, packed in one box.

For a customer job, will my 8 mm ring lugs fit the BT142-N10 stud?

The stud is 5/16 inch or 8 mm. Use lugs with a hole to match.

Doing this in the driveway, can the negative BT142-N10 go on the other battery post?

No. Positive posts are slightly larger than negative ones, so this negative terminal is sized for the negative post only.

For a customer job, my old bolt terminal is cracked; can I just swap in the BT142-N10?

Cut the cable back to clean, bright copper if the old end is green or black, then fit the new terminal and tighten it firmly.

Fitting it myself, is a terminal protector worth using over a BT142-N10?

Yes. Once it is tight, a thin coat of terminal grease or protector spray over the joint slows corrosion.