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connects fractional tube to female straight thread
Alternative O-ring materials are available, including silicone, and Buna-N.
O-ringStraightConnectorCOS
O-ringStraightConnectorCOSdimdraw
Unit of Measure
1 2 3 4 

Item #

Material

T - Tube O.D.

S - Straight Thread

A

B - Hex Flat

C - Hex Flat

E Min

G

4COSM N/A Monel N/A 1/4 in N/A 7/16-20 N/A 1.55 in N/A 9/16 in N/A 3/4 in N/A .19 in N/A 1.22 in
6COSM N/A Monel N/A 3/8 in N/A 9/16-18 N/A 1.72 in N/A 11/16 in N/A 15/16 in N/A .30 in N/A 1.38 in
8COS6M N/A Monel N/A 1/2 in N/A 9/16-18 N/A 1.88 in N/A 7/8 in N/A 15/16 in N/A .30 in N/A 1.41 in
8COSM N/A Monel N/A 1/2 in N/A 3/4-16 N/A 1.88 in N/A 7/8 in N/A 1 1/8 in N/A .42 in N/A 1.41 in
10COSM N/A Monel N/A 5/8 in N/A 7/8-14 N/A 1.94 in N/A 1 in N/A 1 5/16 in N/A .50 in N/A 1.50 in
12COSM N/A Monel N/A 3/4 in N/A 1 1/16-12 N/A 2.09 in N/A 1 1/8 in N/A 1 1/2 in N/A .66 in N/A 1.66 in
14COSM N/A Monel N/A 7/8 in N/A 1 1/16-12 N/A 2.09 in N/A 1 1/4 in N/A 1 1/2 in N/A .72 in N/A 1.66 in
16COSM N/A Monel N/A 1 in N/A 1 5/16-12 N/A 2.38 in N/A 1 1/2 in N/A 1 3/4 in N/A .88 in N/A 1.81 in
1COSHC N/A Hastelloy® C-276 N/A 1/16 in N/A 5/16-24 N/A 1.13 in N/A 5/16 in N/A 9/16 in N/A .05 in N/A .91 in
2COSHC N/A Hastelloy® C-276 N/A 1/8 in N/A 5/16-24 N/A 1.25 in N/A 7/16 in N/A 9/16 in N/A .09 in N/A 1.03 in
3COSHC N/A Hastelloy® C-276 N/A 3/16 in N/A 3/8-24 N/A 1.41 in N/A 1/2 in N/A 5/8 in N/A .13 in N/A 1.09 in
4COSHC N/A Hastelloy® C-276 N/A 1/4 in N/A 7/16-20 N/A 1.55 in N/A 9/16 in N/A 3/4 in N/A .19 in N/A 1.22 in
6COSHC N/A Hastelloy® C-276 N/A 3/8 in N/A 9/16-18 N/A 1.72 in N/A 11/16 in N/A 15/16 in N/A .30 in N/A 1.38 in
8COS6HC N/A Hastelloy® C-276 N/A 1/2 in N/A 9/16-18 N/A 1.88 in N/A 7/8 in N/A 15/16 in N/A .30 in N/A 1.41 in
8COSHC N/A Hastelloy® C-276 N/A 1/2 in N/A 3/4-16 N/A 1.88 in N/A 7/8 in N/A 1 1/8 in N/A .42 in N/A 1.41 in
10COSHC N/A Hastelloy® C-276 N/A 5/8 in N/A 7/8-14 N/A 1.94 in N/A 1 in N/A 1 5/16 in N/A .50 in N/A 1.50 in
12COSHC N/A Hastelloy® C-276 N/A 3/4 in N/A 1 1/16-12 N/A 2.09 in N/A 1 1/8 in N/A 1 1/2 in N/A .66 in N/A 1.66 in
14COSHC N/A Hastelloy® C-276 N/A 7/8 in N/A 1 1/16-12 N/A 2.09 in N/A 1 1/4 in N/A 1 1/2 in N/A .72 in N/A 1.66 in
16COSHC N/A Hastelloy® C-276 N/A 1 in N/A 1 5/16-12 N/A 2.38 in N/A 1 1/2 in N/A 1 3/4 in N/A .88 in N/A 1.81 in
1COS600 N/A Inconel N/A 1/16 in N/A 5/16-24 N/A 1.13 in N/A 5/16 in N/A 9/16 in N/A .05 in N/A .91 in
2COS600 N/A Inconel N/A 1/8 in N/A 5/16-24 N/A 1.25 in N/A 7/16 in N/A 9/16 in N/A .09 in N/A 1.03 in
3COS600 N/A Inconel N/A 3/16 in N/A 3/8-24 N/A 1.41 in N/A 1/2 in N/A 5/8 in N/A .13 in N/A 1.09 in
4COS600 N/A Inconel N/A 1/4 in N/A 7/16-20 N/A 1.55 in N/A 9/16 in N/A 3/4 in N/A .19 in N/A 1.22 in
6COS600 N/A Inconel N/A 3/8 in N/A 9/16-18 N/A 1.72 in N/A 11/16 in N/A 15/16 in N/A .30 in N/A 1.38 in
8COS6600 N/A Inconel N/A 1/2 in N/A 9/16-18 N/A 1.88 in N/A 7/8 in N/A 15/16 in N/A .30 in N/A 1.41 in
Unit of Measure
1 2 3 4