Replacement Spindle Jam Nut for EZ Loader Boat Trailer with Grease Zerk at End of Spindle

Updated 07/30/2014 | Published 07/27/2014

Products Featured in This Question

Replacement Trailer Spindle Jam Nut - 1" Diameter - Plain

(32)

$6.97

Spindle Nut for Axles with 7/8" - 14 Castle Nut

(54)

$7.67

Question:

I am trying to find a replacement spindle nut for an ez loader boat trailer. The spindles have the grease zerk on the end that flushes the old grease out from the back which is the ez lube style. I just ordered grease seal part # 168233 from etrailer for these hubs. The thread diameter looks like 3/4inch and the outside diameter of the nut is just over an inch. Is part # 6-191 the part I need?

asked by: Joe M

Expert Reply:

The thread diameter of spindle jam nut # 6-191 is 1 inch. If you do need a 3/4 inch then this nut will not work, though it is for EZ lube spindles that have the grease zerk at the end.

We do not have a 3/4 inch jam nut. The closest match is a 7/8 inch castle nut # 165931.

You can double check the measurement by using dial or digital calipers to measure the diameter of the threaded part of the spindle. It if turns out to be 1 inch then you can use # 6-191.

expert reply by: Michael H