• Multi-Threaded Self-Retaining Imperial U-Nuts
Multi-Threaded Self-Retaining U-Nuts, also known as Tapped Barrel U-Nuts, are primarily used in the automotive industry where extra strength is required. The strength of the tapped barrel u-nut is equal to the machine screw used. It allows single-wrench tightening of the thread assembly. In addition, some multi-threaded u-nuts are available in Free Spin or Prevailing Torque designs. This page displays Imperial Thread X Pitch Sizes from 1/4 x 20 - 10 x 32.
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Item #

Item Name

Throat Depth

Thread x Pitch

Minimum Panel Thickness

Maximum Panel Thickness

N/A 0.025 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial Plain U-Nut N/A 0.540 in N/A 1/4 x 20 N/A 0.025 in N/A 0.150 in
N/A 0.030 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial Anodic E-Coat and Dry-to-Touch Oil U-Nut N/A 0.450 in N/A 1/4 x 20 N/A 0.030 in N/A 0.150 in
N/A 0.050 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial Phosphorous and Oil U-Nut N/A 0.660 in N/A 3/8 x 16 N/A 0.05 in N/A 0.2 in
N/A 0.050 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial Dacromet U-Nut N/A 0.660 in N/A 3/8 x 16 N/A 0.05 in N/A 0.2 in
N/A 0.050 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial Phosphorous and Oil U-Nut N/A 0.730 in N/A 3/8 x 16 N/A 0.05 in N/A 0.2 in
N/A 0.050 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial Phosphorous and Oil U-Nut N/A 1.090 mm N/A 3/8 x 16 N/A 0.05 in N/A 0.2 in
N/A 0.030 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial Phosphorous and Oil U-Nut N/A 0.500 in N/A 5/16 x 18 N/A 0.030 in N/A 0.150 in
N/A 0.050 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial Water-based Rust Inhibitor U-Nut N/A 0.500 in N/A 5/16 x 18 N/A 0.05 in N/A 0.2 in
N/A 0.050 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial Phosphorous and 1 Coat Paint and Oil U-Nut N/A 0.500 in N/A 5/16 x 18 N/A 0.05 in N/A 0.2 in
N/A 0.025 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial Phosphorous and Oil U-Nut N/A 0.830 in N/A 5/16 x 18 N/A 0.025 in N/A 0.150 in
N/A 0.025 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial Phosphorous and Oil U-Nut N/A 0.570 in N/A 5/16 x 18 N/A 0.025 in N/A 0.150 in
N/A 0.030 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial Phosphorous and Oil U-Nut N/A 0.300 in N/A 8 x 32 N/A 0.030 in N/A 0.150 in
N/A 0.025 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial Phosphorous and Oil U-Nut N/A 0.450 in N/A 10 x 24 N/A 0.025 in N/A 0.125 in
N/A 0.070 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial Mechanical Zinc Plate U-Nut N/A 0.270 in N/A 10 x 32 N/A 0.070 in N/A 0.100 in
N/A 0.070 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial Zinc Elec and Clear Chromate U-Nut N/A 0.270 in N/A 10 x 32 N/A 0.070 in N/A 0.100 in
N/A 0.070 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial Zinc Elec and Chromate U-Nut N/A 0.270 in N/A 10 x 32 N/A 0.070 in N/A 0.100 in
N/A 0.030 Inch (in) Minimum Panel Thickness Multi-Threaded Self-Retaining Imperial U-Nut N/A N/A 1/4 x 20 N/A 0.030 in N/A 0.150 in
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