SP G250 jam nut

[Couv]

In a thread (First Reg Set) too far removed in title from the intent of this thread, some of the Usual Suspects were discussing an alternative to the proprietary jam nut found on the G250 and similar second stages. I suggested that a standard 316 stainless steel nut with the same thread pitch (9/16-18) might work. However, I purchased one from the Helpful Hardware Man and I'm sorry to report that while the threads are correct and the nut threads onto the airbarrel--- ALMOST. The problem is with the exhaust tee on the second stage body. The nut is too large to fit under the tee for the final few turns. Too bad because McMaster has them for about a buck each.

Unless one of you sharpies can come up with an alternative, I'll be sticking with my SP jam nut.

 

[rhwestfall]

Washer or two

 

[Couv]

Washer or two

Yes, that would work, and using a thinner nut (also available at McMaster) would allow threading the hose on the normal distance. However, a nut & washers just doesn't "seem" right.

 

[ams511]

Thanks for the effort.

 

[lexvil]

Notch the tee, because that makes more sense than buying the tool

 

[Fibonacci]

Machine off half or two thirds of the hex into a cylindrical section to let it pass under the T?

 

[ams511]

What do you guys think about this? 9/16"-18 Grade 18-8 Stainless Steel Jam Nut | Fastenal

GRAINGER APPROVED Jam Nut,9/16-18,Gr 18-8,SS,Plain,PK10 - 1WU13|1WU13 - Grainger

 

[ams511]

OK this is the best: 9/16"-18 Grade 316 Stainless Steel Jam Nut | Fastenal

 

[Bryan@Vintage Double Hose]

Didn't we just talk about this ?

 

[ams511]

Yes, we are getting estimates so we can talk you down in price.