Grease gun thread

Grease gun thread

This topic has 5 replies, 4 voices, and was last updated 22 May 2020 at 13:52 by Adrian L.

Viewing 6 posts - 1 through 6 (of 6 total)

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22 May 2020 at 12:55 #473893
Adrian L
Participant
@adrianl82643
Hi all.

Can anyone help me please?

I'm wanting to replace my grease gun nozzle, the bit that actually fits over the zerk/grease nipple. The reason being I've recently bought a Clarke hand operated grease gun and I couldn't get the darn thing off again without a load of hassle. I've seen the G coupler and this looks to solve the problem, this is available with a 1/8th BSP fitting which I think I may require, when I've done a bit of ringing around, but they couldn't give me a definitive answer.

I've had a thread gauge, marked as metric, on the existing thread on the gun and it looks like a '28' thread, does this convert as a 1/8th BSP does anybody know?

I measured across the tops of the grease gun thread, that came out as 381 thou which converts as 9.67 mm.

Thanks in advance.
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22 May 2020 at 12:55 #19768
Adrian L
Participant
@adrianl82643
22 May 2020 at 13:13 #473899
Martin Connelly
Participant
@martinconnelly55370
1/8" BSP is 28 tpi with a tapping drill size of 8.6mm so 9.67mm diameter on the outside of the thread sounds reasonable.

Martin C
22 May 2020 at 13:14 #473901
Ex contributor
Participant
@mgnbuk
1/8" BSP is 28 tpi & 9.5mm OD – Google "BSP threads" for a choice of thread charts.

The odd grease gun I have had to change nozzles on have had 1/8" BSP threads.

Nigel B.
22 May 2020 at 13:22 #473902
old mart
Participant
@oldmart
The only other similar thread is 1/8 NPT which is 27tpi. Using something to seal the threads when you assemble the joint will even work well if there are mismatched threads.
22 May 2020 at 13:52 #473913
Adrian L
Participant
@adrianl82643
Hi all ,

Thanks to all replies so far, that's given me confidence to order the fitting as 1/8th BSP, great stuff.
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