Contact Apex Fasteners

APEX offers full-service design, engineering and manufacturing to your specifications. Our custom fasteners have enjoyed great success supplying all types and sizes of businesses in most sectors of industry.
Contact Apex Fasteners with your hardware requirements

Authorized Distributor for:

Product 9/10

 Previous 
 Return to the Product List 
 Next 

U-Nuts

Single-Thread U-Nut

Single-ThreadU-Nut.jpg
Single-ThreadU-NutDiagram.jpg

Basic Part Numbers
Thd. A
Length 		B
Throat		 C
Nut Width 		D
Leg Width 		H
Height 		P
Dia. 		Q
Distance To Edge 		T
Panel Range
US420018 #8-18 0.717/0.705 0.360/0.340 0.646/0.650 0.079 0.154/0.142 0.315 0.340 0.142/0.122
US818249 #8-18 0.775/0.755 0.390/0.350 0.551/0.520 0.079 0.195/0.165 0.315 0.315 0.075/0.025
US818035 #8-18 0.775/0.755 0.390/0.350 0.551/0.520 0.079 0.195/0.165 0.315 0.315 0.150/0.070
US420519 #8-18 0.783/0.763 0.360/0.340 0.551/0.520 0.079 0.189/0.150 0.275 0.340 0.150/0.026
US420619 #8-18 0.783/0.736 0.360/0.340 0.551/0.520 0.079 0.280/0.260 0.270 0.319 0.250/0.126
US420419 #8-18 0.783/0.736 0.360/0.340 0.551/0.520 0.079 0.189/0.150 0.275 0.340 0.150/0.026
US420020 #8-18 0.785/0.755 0.365/0.335 0.551/0.520 0.079 0.180/0.160 0.220 0.300 0.150/0.060
UG630019 1/4-14 0.783/0.736 0.360/0.340 0.650/0.618 0.079 0.189/0.150 0.373 0.339 0.150/0.026
US254020 1/4-14 0.785/0.755 0.365/0.335 0.650/0.620 0.079 0.280/0.260 0.280 0.319 0.250/0.126

Performance Requirements

Thread Size Performance Requirements Recommended Installatation Torque Minimum Clamp Load at Recommended Installation Torque
In. Max. In. Lbs. Min. Lbs.
8-18 19.5 400.2
1/4-14 62.0 750.9


Multi-Thread U-Nuts

Multi-ThreadU-Nuts.jpg
Multi-ThreadU-NutsDiagram.jpg

Basic Part Numbers Screw Size A B C D E F G Panel Hole Dia. ±.015 Panel Thickness Range
LUG 103239 10-32 .600 .310 .510 .450 .210 .026 .120 .260 .070-.100
LUG 142059** 1/4-20 .920 .540 .560 .500 .240 .035 .180 .375 .025-.150
LUG 561863** 5/16-18 .980 .570 .670 .560 .315 .040 .180 .437 .025-.150
LUG 565763** 5/16-18 .980 .570 .67 .560 .315 .040 .220 .437 .050-.200
LUG 381683** 3/8-16 1.290 .730 .930 .700 .370 .050 .230 .562 .050-.200

** Also available in metric equivalent sizes

Threaded Palnuts

U-Nuts


Product 9/10

 Previous 
 Return to the Product List 
 Next 
APEX FASTENERS, Inc - 15858 Business Center Drive - Irwindale, CA 91706 USA
APEX Fasteners supplies standard and custom screws, nut retainers, shoulder screws, plastites and taptites, all types of rivets, spring steel fasteners and special stampings, sems screws in standard, fractional or metric to electronics, aviation and other OEM industries worldwide. ApexFasteners.com custom manufactures screw machine components for electronic enclosure hardware as well as cold forming and cold headed specials for assembly and production requirements.
Tel: (626) 962-2219 - info@apexfasteners.com
Copyright © 2024 Apex Fasteners. Designed by Pope Productions