Check your battery stud sizes before ordering or order the "3 Pack".

The "3 Pack" contains both Positive stud size options.

Most marine batteries are available with two different terminal stud configurations:

1- The more popular, both positive and negative studs are the same size, 5/16-18.

                                        -or-

2- The positive stud is larger, 3/8-16 and the negative stud is 5/16-18.

Choose the kit to fit your battery.

  • Standard Kit - Both Positive and Negative threads are 5/16.
  • Different Kit - Positive is 3/8 and the Negative is 5/16.
  • 3 Pack - Two Positive knobs, one 5/16 and one 3/8 and one Negative 5/16.
  • See below for cost savings on multiple battery kits and other size options.

Get 25% off listed prices by using coupon code:

25%off

Battery Knobs - 3 pack $24.95
Click Here for Product Details! Set of three plastic knobs. This set will guarantee you have the size you require. Keep the unused knob in case your next battery has a different size thread. This set includes two positive knobs, One with 5/16-18 standard thread inserts and one with the 3/8-16 insert for larger battery studs and one 5/16-18 negative knob.
Battery Knobs - Different Threads $19.95
Click Here for Product Details! Set of two plastic knobs with different thread size inserts. 5/16-18 for the negative (black) and 3/8-16 for the positive (red).
Battery Knobs - Standard Thread $19.95
Click Here for Product Details! Set of two plastic knobs both with 5/16-18 standard thread inserts. This is for most marine batteries. The terminals are both the same size.
Single Red 3/8-16 Positive $10.32
Click Here for Product Details! Single 3/8-16 positive (red) Battery Knob
Single Red Positive 5/16-18 thread. $10.32
Click Here for Product Details! Red Positive 5/16-18 thread.
Single Black Negative 5/16-18 thread. $10.32
Click Here for Product Details! Standard Black Negative 5/16-18 thread.
Battery Knobs - Dual Battery Different Thread $36.20
Click Here for Product Details! Two sets of two plastic knobs. Each Set contains two knobs with different thread size inserts. 5/16-18 for the negative (black) and 3/8-16 for the positive (red).
Battery Knobs - Dual Battery Standard Thread $36.20
Click Here for Product Details! Two sets of two plastic knobs. Each knob has a 5/16-18 standard thread inserts. These knobs fit batteries that have both positive and negative terminals the same size.
Battery Knobs - Special Thread $19.95
Click Here for Product Details! Set of two plastic knobs both with 3/18-16 standard thread inserts. This is for specialty marine batteries with a 3/8" Negative and Positive terminals. The terminals are both the same size.
Single Black 3/8-16 Negative $10.32
Click Here for Product Details! Single 3/8-16 Negative (Black) Battery Knob
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