M149 Air vent bolt

[nwestwood]

I picked up a nice M149 stainless steel tank and am going through all the rusty parts. On the top of the tank there is/was a bolt with small vent holes, In attempting to remove it (it was complety rusted over), the head broke off, I was able to remove the bolt, its drilled out in the middle then with 2 small holes drilled into the side of the threads to allow pressure out I presume. In attempting to find a replacement, I can't find a standard or metric size that matches, let alone one one drilled like this.

Does anyone know where to find such a bolt, or what size it actually is? the TM just shows


PA022 4820008561721 19207 7034882 Valve, Vacuum Breaki

No details on the size, How can I find replacement?

Thanks

 

[nwestwood]

Turns out its a pipe thread, and there is a standard vent thing, got it at a hose and rubber shop.

 

[flyfishtrailer]

Glad to hear you got it sorted out. Would love to see pictures of the end results.

 

[nwestwood]

Here are some pics of the trailer after my restoration. The pipe/vent plug we found at a hose and rubber shop, its a porous material, that lets air out but not water in. I added a trailer hitch so I can pull doubles when needed. Tank is Stainless steel and nice and clean. I replaced several of the valves and rubber seals that were damaged or worn.

 

[flyfishtrailer]

awesome.....mow I need to find one for me

 

[flyfishtrailer]

Curious about that bolt, can you share what it was called and what size it was? Maybe a link to buy one? Thanks

 

[SCSG-G4]

That is a sintered brass bolt. Basically, very small pieces of brass (almost like dust) that are fused together, so that it is porous but does not allow large particles to get through. People have used them to give a vent to their axles by havint the bolt 'plug' high up in the engine compartment. There was a thread about doing that probably 8-11 years ago.

 

[nwestwood]

Curious about that bolt, can you share what it was called and what size it was? Maybe a link to buy one? Thanks

Stainless Steel Breather Vent (Quantity Varies by Size)

Filter Regulator, Air Pressure Regulator, Compressed Air Drying Sytem, Pneumatic Fittings, Air Receiver Tanks, Airline Units, Solenoid Valves, Mechanical Valves, Breather Vents & More

www.pneumaticplus.com

STAINLESS STEEL BREATHER VENT

Someone else found it for me,looks like you can get it in different sizes

 

[frank8003]

Used those fittings all over the powerplant instrumentation lines and got them from SwageLok. We called them mud dauber fittings. the bugs would make a home and fill up the vent lines. Also seen them with very fine porus stone in the end.

 

[flyfishtrailer]

Thanks all......might be acquiring a water buffalo in a couple of weeks and was doing as much reading as I can find in here. You guys are an amazing source of knowledge!

 

[frank8003]

Post #8 has your answer and also from McMaster Carr

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com