• Hex Coupling Nuts
IFI-128 is a standard developed through the procedures of Industrial Fasteners Institute. IFI-128 was first published in 1978 and reaffirmed, without technical change, in 1986 and in 2000.
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Item #

Description

Nominal Size or Basic Major Dia. of Thread

Basic (F)

Max. (G)

Basic (H)

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N/A Hex Coupling Nut, 1.6250" Nominal Dia. N/A 1-5/8 in N/A 2-9/16 in N/A 2.959 in N/A 4-7/8 in
N/A Hex Coupling Nut, 1.3750" Nominal Dia. N/A 1-3/8 in N/A 2-1/16 in N/A 2.382 in N/A 4-1/8 in
N/A Hex Coupling Nut, 1.7500" Nominal Dia. N/A 1-3/4 in N/A 2-3/4 in N/A 3.175 in N/A 5-1/4 in
N/A Hex Coupling Nut, 1.1250" Nominal Dia. N/A 1-1/8 in N/A 1-11/16 in N/A 1.949 in N/A 3-3/8 in
N/A Hex Coupling Nut, 1.2500" Nominal Dia. N/A 1-1/4 in N/A 1-7/8 in N/A 2.165 in N/A 3-3/4 in
N/A Hex Coupling Nut, 1.5000" Nominal Dia. N/A 1-1/2 in N/A 2-1/4 in N/A 2.598 in N/A 4-1/2 in
N/A Hex Coupling Nut, 0.2500" Nominal Dia. N/A 1/4 in N/A 3/8 in N/A 0.433 in N/A 3/4 in
N/A Hex Coupling Nut, 0.5000" Nominal Dia. N/A 1/2 in N/A 3/4 in N/A 0.866 in N/A 1-1/2 in
N/A Hex Coupling Nut, 1.0000" Nominal Dia. N/A 1 in N/A 1-1/2 in N/A 1.732 in N/A 3 in
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