Battery Cable Terminal Ends: Top Post, Side Post, Elbow or Flag

Below is a brief description of the different types of battery cable terminal ends to help you choose exactly what will work best for you.

Battery Terminals:

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Straight Top Post:

This is the most common battery terminal and probably what you think of when we talk about battery cable ends. They come in a large variety of sizes from 6 gauge to 4/0 gauge.  The terminals we sell are die-cast solid copper with tin plating for corrosion resistance.

Elbow Top Post Battery Terminal:

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These are available in Right or Left.  They are useful in certain applications where space is a concern or if you want a different look. (Left elbow shown). Elbow terminals are a little more expensive (about $1 more).

Side Post or Stud Top Terminals:

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These are heavy-duty replacements for the cable ends used by some OEMs on new cars and for stud top industrial batteries. 

Double Barrel Stud Top Terminals:

double barrel lug 50

These are for connecting several stud top batteries together in parallel.  They are the stud top equivalent of the flag terminal shown below. We do not normally stock them but they are available special order.  One could also use a double-barrel terminal for a ground in the middle of a ground cable.  Double barrel lugs are only available in 1/0 and larger with 3/8 hole. I do not normally stock them but they are available special order.

Flag Terminal:

top post flag battery terminal
top post flag battery terminal

This style is used for dual battery setups where two or more batteries will be connected in parallel on a single cable. Please note that because these require 2 connections and 2 heat shrink, the labor for these will be double. We stock these in 1/0 thru 4/0. 

Terminal Sizes:

Not every terminal is available in every wire gauge.  For example, 6 gauge elbow terminals are not available. Here is a table with what we normally stock (“Yes”); what we can order special order (“SO”);  and what is hard to find (“No”).

Wire
Size
Top Post StraightTop Post w/extra wireElbow
Top Post
Side Mount
or Stud Top
FlagFlag w/extra wireDouble
Barrel
8gaNoNoNoNoNoNoNo
6gaUniversal OnlyNoNoNoNoNoNo
4gaPos & NegNoR & L Universal OnlyYesNoNoNo
1-2 ( 1 or 2ga)Pos & NegNoR & L Universal OnlyYesNoNoNo
1/0 or 0 or “one-aught”Pos & NegNOPos & Neg in Left and RightYesPos & NegNoSO
2/0 or 00 or “Two-aught”Pos & NegPositive onlyPos & Neg in Left and RightYesPos & NegPositive OnlySO
3/0 or 000 or “three-aught”Pos & NegNoPos & Neg in Left and RightYesPositive OnlyPositive OnlySO
4/0 or 0000 or “four-aught”Pos & NegNoSpecial OrderYesPositive OnlyNoSO

Ring Terminals:

Ring Terminal or Lug:

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what you need to connect o the starter, solenoid, alternator, or deep cycle battery. A heavy-duty end is shown. The metal used in the heavy-duty ends is twice as thick. The HD ends are also wider and more expensive. As lugs get larger, more copper is required to make them, therefore they cost more.

Heavy Duty 45/90:

Heavy Duty Lug with 45 bend
Heavy Duty Lug with 45 bend

duty ring terminals are also available with a 45 degree or 90-degree bend.  Not all sizes are available. These terminals are more expensive than the normal heavy-duty lugs. We do NOT recommend trying to make your own bent ends, very often the ends will crack possibly leading to premature failure.

Ring Terminal Sizes:

Not every hole size is available with every wire gauge. For example, 4/0 gauge lug with 1/4 holes is not something we stock and can be very hard to find. Here is a table with what we normally stock (“Yes”); what we can special order (“SO”) and what is not available (“NA”). We try to stock all sizes up to 3/0.  We don’t stock much 4.0 due to low demand.

Wire Size1/4
Std
lug
5/16
Std
lug
3/8
Std
lug
1/2
Std
lug
1/4
HD
5/16
HD
3/8
HD
1/2
HD
5/16
HD-45
3/8
HD-45
1/2
HD-45
5/16
HD-90
3/8
HD-90
1/2
HD-90
8gaYesYesYesYesYesYesYesNANANANANANANA
6gaYesYesYesYesYesYesYesYesYesYesYesYesYesYes
4gayesYesYesYesYesYesYesYesYesYesYesYesYesYes
2ga
(or 1-2)
YesYesYesYesYesYesYesYesYesYesYesYesYesYes
1ga
(or 1-2)
YesYesYesYesYesYesYesYesYesYesYesYesYesYes
1/0 or 0 or “one aught”YesYesYesYesYesYesYesYesYesYesYesYesYesYes
2/0 or 00
or “two-aught”
YesYesYesYesYesYesYesYesYesYesYesYesYesYes
3/0 or
000 or
“three-aught”
SOSOYesYesYesYesYesYesNAYesYes NAYesYes
4/0 or 0000
or “four-aught”
SOSOYesYesYesYesYesYesNASOSONASOSO