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AN fitting 37° Flare is designed to SAE J514 standard. AN fittings are used normally in Army and Navy instrumentation.
Unit of Measure

Specifications

Z Series Ferrule

 No

Material

 Hastelloy C276

Moly Coating

 None

Dimensions

D - Tube O.D.

 5/16 in7.9 mm

AN Tube Flare Size

 5/16 in7.9 mm

Thread Type

 U

T - Thread Size

 1/2-20

E - Min.

 5.8 mm

h - Width Across Flat

 9/16 in14.3 mm

H - Width Across Flat

 5/8 in15.9 mm

A

 16.3 mm

B

 18.5 mm

l

 31.0 mm

L

 38.4 mm