Air Products cylinder valve outlets and connections are designed and constructed to conform to the specifications established by the Compressed Gas Association (U.S.A. only). The CGA connection standard numbers are followed by a multipart, sequentially listed descriptive code. This code generally includes:

• Outside diameter of valve threads.
• Threads per inch and thread size.
• Left-hand or right-hand thread.
• External or internal threads.

CGA 160: 1/8"-27 NGT-RH-INT	CGA 165: .4375"-20 UNF-2A-EXT (1/4" SAE FLARE)
CGA 170: .5825"-18 UNF- 2A-RH-EXT	CGA 180: .625"-18 UNF-2A-RH-EXT
CGA 240:    3/8"-18 NGT-RH-INT	CGA 296:  .803" 14 UNS-2B-RH-INT (Bullet Nipple)
CGA 300: .825"-14 NGO-RH-EXT (Conical Nipple)	CGA 320: .825"-14 NGO-RH-EXT (Flat Nipple)
CGA 326: .825"-14 NGO-RH-EXT (Small Round Nipple)	CGA 330: .825"-14 NGO-LH-EXT (Flat Nipple)
CGA 346: .825"-14 NGO-RH-EXT (Large Round Nipple)	CGA 347: .825"-14 NGO-RH-EXT (Long Round Nipple)
CGA 350: .825"-14 NGO-LH-EXT (Round Nipple)	CGA 500: .825"-14 NGO-RH-INT (Bullet Nipple)
CGA 510: .825"-14 NGO-LH-INT	CGA 540: .825"-14 NGO-RH-EXT
CGA 580: .965"-14 NGO-RH-INT	CGA 590: .965"-14 NGO-LH-INT
CGA 660: 1.030"-14 NGO-RH-EXT (Face Washer)	CGA 670: 1.030"-14 NGO-LH-EXT (Face Washer)
CGA 677: 1.030"-14 NGO-LH-EXT (Round Nipple)	CGA 678: 1.030"-14 NGO-LH-EXT (Recessed Washer)
CGA 679: 1.030"-14 NGO-LH-EXT (Tipped Nipple)	CGA 680: 1.045"-14 NGO-RH-INT
CGA 695: 1.045"-14 NGO-LH-INT	CGA 703: 1.125"-14 NGO-LH-INT
CGA 705: 1.125"-14 UNS-2A-RH-EXT (Face Washer)	CGA 973: Pin Indexed Yoke, Pins 11-24