O-ring Size Chart: Classic, RT and X-valve, L10, ULT, Emag

[Justus]

These have been posted before, though incomplete and not stickied. They're also on MCB. But people on AO ask for them from time to time, so I thought I'd repost the information in hopes that it can remain easily accessible. If I'm missing something or have something wrong, let me know and I'll update this original post.

O-ring Size Chart

* All o-rings are 90D urethane unless specified *

Originally posted by sunshaker:
Classic Valve (for Automag 68 and Mini-Mag; 1 rebuild)
4 Power Tube O-rings 010
4 Teflon O-rings 006 (PTFE)
2 Barrel O-rings 018
2 Reg. Piston O-rings 012
1 Reg. Body O-ring 116

RT Classic (1 rebuild)
3 Field Strip Banjo O-rings 009
3 Barrel O-rings 018
2 Power Tube O-rings 010
1 Reg. Piston O-ring 012
2 Reg. Seat O-rings 008
1 Reg. Body O-ring 018
2 RT On/Off Small O-rings 004
4 RT Reg. Valve Pin O-rings 006

Level 10 Bolt (1 install)
2 Carrier O-rings 008
1 Power Tube Tip O-ring M1.78X7.94?!? (I need to confirm this. Is this the same Size as would be found on other mag valve tips? I had a dead one in an old Mini-mag that I couldn't figure out the size for, but I replaced the Level 7 with a Level 10 and didn't need it anymore.)

Originally posted by Justus:
X-Valve (for RT-Pro, RT Custom, Emag, and Xmag; 1 rebuild)
2 Power Tube (on/off bottom) O-rings - 010
1 Reg. Piston O-ring - 012
3 Reg. Seat O-rings - 008
1 Reg. Body O-ring - 017
2 RT On/Off Small O-rings - 004
4 Reg. Valve Pin O-rings - 006
5 L10 Carrier o-ring - 008

Additional information:
Emag Quad O-ring - 006 (0.070" width, Buna-N; cross section looks like an "x")
ULT Outer (large) O-rings, top and bottom - 010
ULT Top (small) O-ring - 006 (fits around the ULT pin coming out the top)
ULT Inside (tiny) O-ring - off the charts small (Buna-N; sold by AGD or Tuna)
L10 Powertube Shims - .010" thickness, otherwise same dimension as ULT shims
ULT Shims - .005" thickness, otherwise same dimension as L10 shims
X-valve Red Powertube O-ring - 1mm X 20mm (Buna-N 70D; not exact, but a suitable replacement (http://www.theoringstore.com/index.php?main_page=product_info&cPath=368_12_36&products_id=1798) as confirmed by hill160881 (http://www.automags.org/forums/showthread.php?257441-Efficiency-mods&p=2768379#post2768379))

[BTAutoMag]

sticky and article this thread!

[yellowmitten]

LOL I just just printed it out and put it in my Parts tool box. Thanks Justus.

[BTAutoMag]

what are sydarm outer valve orings? needs to be added

[Justus]

Haha, a Sydarm is something I've never actually handled before. Send me one and I'll measure and post it up!

[Justus]

Had to edit, had the ULT small o-ring wrong. It's the same thing as the small o-ring on top of a RT on/off, which the on/off pin passes through at the top. That's a 006 o-ring. The 004 o-ring is actually the smallest o-ring in an RT on/off, on the inside. I had misread when transferring that number. It's corrected in the original post now.

[BTAutoMag]

... My sydarm doesn't have those orings... Otherwise your have it

[Tunaman]

There are orings in the Sydarm that 99.9% of you guys have never seen...or don't even know they exist. ;)

[BTAutoMag]

well lets measure these suckers

[Billz804]

Great, thanks for posting this!

[Menace_AO]

Justus,

Was looking this list over and caught something. I believe the ULT top o-ring (for the pin head) is an 004, while the internal small stem o-ring is an 001. Those o-ring sizes correspond with the physical dimensions of the pin. Recall that the ULT pin head (~.072 IIRC) is on the small side of the RT pin stem (.074), which uses an 004, and the ULT stem is ~.0325 IIRC.

Hope that helps and, to echo what others have posted, thank you for posting this list.

[MPRoberts0]

Why is this not a sticky?!