In reducing couplings, the cam and groove end is the first size given in the part number. (i.e., a 4030-B-AL is a 4" coupler to a 3" male NPT).

Couplers are supplied standard with a Buna-N gasket, other gasket types are available.
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Item #

Size

Material

1510-B-SS N/A 1-1/2 x 1 in N/A 316 Stainless Steel
1510-B-AL N/A 1-1/2 x 1 in N/A Aluminum
2015-B-SS N/A 2 x 1-1/2 in N/A 316 Stainless Steel
2015-B-AL N/A 2 x 1-1/2 in N/A Aluminum
2030-B-AL N/A 2 x 3 in N/A Aluminum
3020-B-AL N/A 3 x 2 in N/A Aluminum
3020-B-SS N/A 3 x 2 in N/A 316 Stainless Steel
3040-B-AL N/A 3 x 4 in N/A Aluminum
4030-B-SS N/A 4 x 3 in N/A 316 Stainless Steel
4030-B-AL N/A 4 x 3 in N/A Aluminum
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