Circle Valve Technologies Inc.
1533 Gehman Road
Harleysville, PA 19438

Toll Free:800-645-6733
Phone: 267-933-6300
Fax: 267-933-6305
Email: [email protected]
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Female NPT to reduced female NPT

Hex Reducing Coupling GCGR
Unit of Measure
1 2 

Item #

Body Material

Connection Size 1

Connection Type 1

Connection Size 2

Connection Type 2

Hex (H)

Length (L)

Dim. P1

GCGR-4-2N-S N/A Stainless Steel N/A 1/4 in N/A Female NPT N/A 1/8 in N/A Female NPT N/A 3/4 in19.05 mm N/A 1.23 in31.2 mm N/A 1/8 in
GCGR-6-4N-S N/A Stainless Steel N/A 3/8 in N/A Female NPT N/A 1/4 in N/A Female NPT N/A 7/8 in22.2 mm N/A 1.37 in34.8 mm N/A 1/4 in
GCGR-8-2N-S N/A Stainless Steel N/A 1/2 in N/A Female NPT N/A 1/8 in N/A Female NPT N/A 1 1/16 in26.9 mm N/A 1.55 in39.4 mm N/A 1/8 in
GCGR-8-4N-S N/A Stainless Steel N/A 1/2 in N/A Female NPT N/A 1/4 in N/A Female NPT N/A 1 1/16 in26.9 mm N/A 1.74 in44.2 mm N/A 1/4 in
GCGR-8-6N-S N/A Stainless Steel N/A 1/2 in N/A Female NPT N/A 3/8 in N/A Female NPT N/A 1 1/16 in26.9 mm N/A 1.77 in45 mm N/A 3/8 in
GCGR-12-4N-S N/A Stainless Steel N/A 3/4 in N/A Female NPT N/A 1/4 in N/A Female NPT N/A 1 5/16 in33.3 mm N/A 1.80 in45.7 mm N/A 1/4 in
GCGR-12-8N-S N/A Stainless Steel N/A 3/4 in N/A Female NPT N/A 1/2 in N/A Female NPT N/A 1 5/16 in33.3 mm N/A 2.05 in52 mm N/A 1/2 in
GCGR-16-4N-S N/A Stainless Steel N/A 1 in N/A Female NPT N/A 1/4 in N/A Female NPT N/A 1 5/8 in41.2 mm N/A 2 in50.8 mm N/A 1/4 in
GCGR-16-8N-S N/A Stainless Steel N/A 1 in N/A Female NPT N/A 1/2 in N/A Female NPT N/A 1 5/8 in41.2 mm N/A 2.18 in55.4 mm N/A 1/2 in
GCGR-16-12N-S N/A Stainless Steel N/A 1 in N/A Female NPT N/A 3/4 in N/A Female NPT N/A 1 5/8 in41.2 mm N/A 2.24 in57 mm N/A 3/4 in
GCGR-4-2N-B N/A Brass N/A 1/4 in N/A Female NPT N/A 1/8 in N/A Female NPT N/A 3/4 in19.05 mm N/A 1.23 in31.2 mm N/A 1/8 in
GCGR-6-4N-B N/A Brass N/A 3/8 in N/A Female NPT N/A 1/4 in N/A Female NPT N/A 7/8 in22.2 mm N/A 1.37 in34.8 mm N/A 1/4 in
GCGR-8-2N-B N/A Brass N/A 1/2 in N/A Female NPT N/A 1/8 in N/A Female NPT N/A 1 1/16 in26.9 mm N/A 1.55 in39.4 mm N/A 1/8 in
GCGR-8-4N-B N/A Brass N/A 1/2 in N/A Female NPT N/A 1/4 in N/A Female NPT N/A 1 1/16 in26.9 mm N/A 1.74 in44.2 mm N/A 1/4 in
GCGR-8-6N-B N/A Brass N/A 1/2 in N/A Female NPT N/A 3/8 in N/A Female NPT N/A 1 1/16 in26.9 mm N/A 1.77 in45 mm N/A 3/8 in
GCGR-12-4N-B N/A Brass N/A 3/4 in N/A Female NPT N/A 1/4 in N/A Female NPT N/A 1 5/16 in33.3 mm N/A 1.80 in45.7 mm N/A 1/4 in
GCGR-12-8N-B N/A Brass N/A 3/4 in N/A Female NPT N/A 1/2 in N/A Female NPT N/A 1 5/16 in33.3 mm N/A 2.05 in52 mm N/A 1/2 in
GCGR-16-4N-B N/A Brass N/A 1 in N/A Female NPT N/A 1/4 in N/A Female NPT N/A 1 5/8 in41.2 mm N/A 2 in50.8 mm N/A 1/4 in
GCGR-16-8N-B N/A Brass N/A 1 in N/A Female NPT N/A 1/2 in N/A Female NPT N/A 1 5/8 in41.2 mm N/A 2.18 in55.4 mm N/A 1/2 in
GCGR-16-12N-B N/A Brass N/A 1 in N/A Female NPT N/A 3/4 in N/A Female NPT N/A 1 5/8 in41.2 mm N/A 2.24 in57 mm N/A 3/4 in
GCGR-4-2N-C N/A Carbon Steel N/A 1/4 in N/A Female NPT N/A 1/8 in N/A Female NPT N/A 3/4 in19.05 mm N/A 1.23 in31.2 mm N/A 1/8 in
GCGR-6-4N-C N/A Carbon Steel N/A 3/8 in N/A Female NPT N/A 1/4 in N/A Female NPT N/A 7/8 in22.2 mm N/A 1.37 in34.8 mm N/A 1/4 in
GCGR-8-2N-C N/A Carbon Steel N/A 1/2 in N/A Female NPT N/A 1/8 in N/A Female NPT N/A 1 1/16 in26.9 mm N/A 1.55 in39.4 mm N/A 1/8 in
GCGR-8-4N-C N/A Carbon Steel N/A 1/2 in N/A Female NPT N/A 1/4 in N/A Female NPT N/A 1 1/16 in26.9 mm N/A 1.74 in44.2 mm N/A 1/4 in
GCGR-8-6N-C N/A Carbon Steel N/A 1/2 in N/A Female NPT N/A 3/8 in N/A Female NPT N/A 1 1/16 in26.9 mm N/A 1.77 in45 mm N/A 3/8 in
Unit of Measure
1 2