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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Male NPT to reduced male NPT

Hex Reducing Nipple GNR
Unit of Measure
1 2 

Item #

Body Material

Connection Size 1

Connection Size 2

Connection Type

Hex (H)

Length (L)

Dim. P1

GNR4-2N-S N/A Stainless Steel N/A 1/4 in N/A 1/8 in N/A Male NPT N/A 9/16 in14.2 mm N/A 1.21 in30.7 mm N/A 1/8 in
GNR6-2N-S N/A Stainless Steel N/A 3/8 in N/A 1/8 in N/A Male NPT N/A 11/16 in17.4 mm N/A 1.26 in32 mm N/A 1/8 in
GNR6-4N-S N/A Stainless Steel N/A 3/8 in N/A 1/4 in N/A Male NPT N/A 11/16 in17.4 mm N/A 1.42 in36.1 mm N/A 1/4 in
GNR8-2N-S N/A Stainless Steel N/A 1/2 in N/A 1/8 in N/A Male NPT N/A 7/8 in22.2 mm N/A 1.46 in37.2 mm N/A 1/8 in
GNR8-4N-S N/A Stainless Steel N/A 1/2 in N/A 1/4 in N/A Male NPT N/A 7/8 in22.2 mm N/A 1.64 in41.7 mm N/A 1/4 in
GNR8-6N-S N/A Stainless Steel N/A 1/2 in N/A 3/8 in N/A Male NPT N/A 7/8 in22.2 mm N/A 1.64 in41.7 mm N/A 3/8 in
GNR12-4N-S N/A Stainless Steel N/A 3/4 in N/A 1/4 in N/A Male NPT N/A 1 1/16 in26.9 mm N/A 1.64 in41.7 mm N/A 1/4 in
GNR12-8N-S N/A Stainless Steel N/A 3/4 in N/A 1/2 in N/A Male NPT N/A 1 1/16 in26.9 mm N/A 1.84 in46.7 mm N/A 1/2 in
GNR16-4N-S N/A Stainless Steel N/A 1 in N/A 1/4 in N/A Male NPT N/A 1 3/8 in34.9 mm N/A 1.94 in49.3 mm N/A 1/4 in
GNR16-8N-S N/A Stainless Steel N/A 1 in N/A 1/2 in N/A Male NPT N/A 1 3/8 in34.9 mm N/A 2.13 in54.1 mm N/A 1/2 in
GNR8-4N-10K-S N/A Stainless Steel N/A 1/2 in N/A 1/4 in N/A Male NPT N/A 7/8 in22.2 mm N/A 1.64 in41.7 mm N/A 1/4 in
GNR-4-2N-B N/A Brass N/A 1/4 in N/A 1/8 in N/A Male NPT N/A 9/16 in14.2 mm N/A 1.21 in30.7 mm N/A 1/8 in
GNR-6-2N-B N/A Brass N/A 3/8 in N/A 1/8 in N/A Male NPT N/A 11/16 in17.4 mm N/A 1.26 in32 mm N/A 1/8 in
GNR-6-4N-B N/A Brass N/A 3/8 in N/A 1/4 in N/A Male NPT N/A 11/16 in17.4 mm N/A 1.42 in36.1 mm N/A 1/4 in
GNR-8-2N-B N/A Brass N/A 1/2 in N/A 1/8 in N/A Male NPT N/A 7/8 in22.2 mm N/A 1.46 in37.2 mm N/A 1/8 in
GNR-8-4N-B N/A Brass N/A 1/2 in N/A 1/4 in N/A Male NPT N/A 7/8 in22.2 mm N/A 1.64 in41.7 mm N/A 1/4 in
GNR-8-6N-B N/A Brass N/A 1/2 in N/A 3/8 in N/A Male NPT N/A 7/8 in22.2 mm N/A 1.64 in41.7 mm N/A 3/8 in
GNR-12-4N-B N/A Brass N/A 3/4 in N/A 1/4 in N/A Male NPT N/A 1 1/16 in26.9 mm N/A 1.64 in41.7 mm N/A 1/4 in
GNR-12-8N-B N/A Brass N/A 3/4 in N/A 1/2 in N/A Male NPT N/A 1 1/16 in26.9 mm N/A 1.84 in46.7 mm N/A 1/2 in
GNR-16-4N-B N/A Brass N/A 1 in N/A 1/4 in N/A Male NPT N/A 1 3/8 in34.9 mm N/A 1.94 in49.3 mm N/A 1/4 in
GNR-16-8N-B N/A Brass N/A 1 in N/A 1/2 in N/A Male NPT N/A 1 3/8 in34.9 mm N/A 2.13 in54.1 mm N/A 1/2 in
GNR-4-2N-C N/A Carbon Steel N/A 1/4 in N/A 1/8 in N/A Male NPT N/A 9/16 in14.2 mm N/A 1.21 in30.7 mm N/A 1/8 in
GNR-6-2N-C N/A Carbon Steel N/A 3/8 in N/A 1/8 in N/A Male NPT N/A 11/16 in17.4 mm N/A 1.26 in32 mm N/A 1/8 in
GNR-6-4N-C N/A Carbon Steel N/A 3/8 in N/A 1/4 in N/A Male NPT N/A 11/16 in17.4 mm N/A 1.42 in36.1 mm N/A 1/4 in
GNR-8-2N-C N/A Carbon Steel N/A 1/2 in N/A 1/8 in N/A Male NPT N/A 7/8 in22.2 mm N/A 1.46 in37.2 mm N/A 1/8 in
Unit of Measure
1 2