Grease gun thread

[Adrian LParticipant @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.

[Adrian LParticipant @adrianl82643]

[Martin ConnellyParticipant @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

[Ex contributorParticipant @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.

[old martParticipant @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.

[Adrian LParticipant @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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