Amazon has several suppliers for these fittings, but none so cheap. Be aware of shipping problems now troubling merchandise from both Europe and China and be prepared to wait it out - if they say up to 5 weeks they mean it (sometimes).
The delrin rings are also available, but judging from the time quote for shipping, also from China:
From the Amazon website:
20pcs Paintball PCP High Pressure PTFE M10/M8 O-Ring Gasket Air Seal Sealing for Mini Gauge pcp Hand Pump Female Connector
Brand: UP100 4.8 out of 5 stars 8 ratings - Paintball airsoft pcp High Pressure PTFE M8 & M10 & BSPP/NPT O-Ring Gasket Air Seal Sealing oring
- Color: white; Material: PTFE; Use for: M10 , M8 or BSPP/NPT thread sealing.
- The size of M10: outside diameter 8.5mm; inner diameter 3.45mm; thickness 2.85mm; The size of M8: outside diameter 6.8mm; inner diameter: 2.88mm; thickness 2.7mm; The size of BSPP/NPT: outside diameter 8.5mm; inner diameter: 3.4mm; thickness 2.6mm
- Used for pressure gauge or coupler seal or other high pressure sealing
- Package content: 20 x PTFE O-Ring Gasket
Air Venturi brand Quick disconnects, both male and female,(sold by Pyramyd) and other suppliers, including Amazon, are also available, but more expensive. I bought two from them when I got a Hill compressor, and have had no leaking problems, or fit problems with them. Pyramyd is tricky though, They charge $5.00 each for the necessary special washer. Factor in shipping costs when buying the stuff, it can quickly erase any price advantage.
I obtained several of these washers directly from Hill at the same time I obtained a service kit for their compressor. ~$4.00 for 5 of them. Someone on the forum somewhere said these fittings and sealing washers are standard stock items at hydraulic supply places and are cheap. I don't know about that first hand.
That rubber lined metal washer is essential with BS
PP fittings - parallel body threads, not tapered body (..."
PT"...meaning pipe taper) , and cannot be made reliably gas tight at our pressures without that type of seal. On the plus side, they only need to be tightened securely, not with a 18" pipe wrench. The seal makes them airtight, not gorilla arms.
There are a number of websites that clarify the mysteries of British threading (...bspp, bspt) (8mm, 10mm), and the US npt (1/8. 1/4, 3/8, etc.) threading. You'll learn you can 'make' most similar threads compatible with a large enough wrench, only maybe, and certainly only once . Don't make that mistake or you'll be trashing otherwise good stuff.
JE, reporting from the Cascadia Subduction Zone
