• 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, 0.8750" Nominal Dia. N/A 7/8 in N/A 1-5/16 in N/A 1.516 in N/A 2-5/8 in
N/A Hex Coupling Nut, 0.7500" Nominal Dia. N/A 3/4 in N/A 1-1/8 in N/A 1.299 in N/A 2-1/4 in
N/A Hex Coupling Nut, 0.6250" Nominal Dia. N/A 5/8 in N/A 15/16 in N/A 1.083 in N/A 1-7/8 in
N/A Hex Coupling Nut, 0.5625" Nominal Dia. N/A 9/16 in N/A 7/8 in N/A 1.010 in N/A 1-11/16 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, 0.4375" Nominal Dia. N/A 7/16 in N/A 11/16 in N/A 0.794 in N/A 1-5/16 in
N/A Hex Coupling Nut, 0.3750" Nominal Dia. N/A 3/8 in N/A 9/16 in N/A 0.650 in N/A 1-1/8 in
N/A Hex Coupling Nut, 0.3125" Nominal Dia. N/A 5/16 in N/A 1/2 in N/A 0.577 in N/A 15/16 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
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