Size Help
To determine your correct size:
----We recommend measuring the threads and cap of your existing fill with a set of calipers for accuracy.
----Most marinas and auto part stores will gladly help you.
----See the X (cap) and Y (threads) in the diagram for description on where to correctly measure.
----We recommend measuring the threads and cap of your existing fill with a set of calipers for accuracy.
----Most marinas and auto part stores will gladly help you.
----See the X (cap) and Y (threads) in the diagram for description on where to correctly measure.
Common Size Chart
*Measured with calipers in decimal form*
Tank Lock 1.916
X = cap
1.75"
1.75"
Y = threads
1.56"
1.56"
Tank Lock 1.5
X = cap
1.75"
1.75"
Y = threads
1.588" to 1.660"
1.588" to 1.660"
Tank Lock 1.75
X = cap
2.125"
2.125"
Y = threads
1.734" to 1.750"
1.734" to 1.750"
Tank Lock 1.1516
X = cap
1.930"
1.930"
Y = threads
1.850" to 1.900"
1.850" to 1.900"
Tank Lock 2.0
X = cap
2.125"
2.125"
Y = threads
1.850" to 1.900"
1.850" to 1.900"
Tank Lock 2.5
X = cap
2.500"
2.500"
Y = threads
2.300" to 2.320"
2.300" to 2.320"
If these measurements do not match your existing cap or you are unsure of what size you need, please call our office or email us at sizehelp@tanklock.com with your measurements for customer assistance.
*Please Note: Size can not be determined by make, model, or year of boat, unless your boat is a Grady White, which all take the Tank Lock 1.5.*