Thread pitch for front axle grease zerk?

C4Ranch · Oct 12, 2014

I poped my grease zerk and need to replace, anyone know the pitch? It's not M10

Rocky Hoffler · Oct 12, 2014

Could it be a drive in zerk they are so small it's hard to tell weather or not it has threads if it just popped out and didn't break off it probably is drive in fitting

C4Ranch · Oct 12, 2014

It's threaded. I bought an assortment pack of metric fittings but the m10 didn't fit.

BeezFun · Oct 12, 2014

In this thread I discovered my loader uses 1/4-28 zerk. So I would guess yours is SAE thread, not metric.

number two · Oct 12, 2014

Grease fittings are normally found in two sizes,a smaller one and a larger one.
On domestic built equipment,the smaller one is 1/4-28,the larger one is 1/8 NPT(National Pipe Taper).
Metric equivalents would be 6MM X 1.0 for the small one,with the larger one is 1/8"BSP(British Pipe Taper).
Since the loader is USA built,it would have the former fittings.
While the tractor itself is Japanese,it would use the latter fittings.
Therer is a 10mm straight fitting available,which is most likely what you have that doesn't fit.
If that's the front axle pivot fitting we're talking about,I believe it would be the 1/8" BSP
IIRC the 1/8 NPT is 27 threads per inch and 1/8 BSP is 28 threads per inch.
The O.D. of an 1/8" pipe thread fitting would be close to 10mm.
Pipe thread is measured by the I.D. of the pipe.
Sorry to ramble but hope this helps.
Good Luck!