Two-Way Reversible Lock Nuts: Dimensions & Specifications

Two-Way Reversible Lock Nut Drawing

Two Way Reversible Lock Nuts: Dimensions

Nominal or Basic Major Diameter of Thread

Click on size to search products 		 Width Across Flats (F)

 Width Across Corners (G) Thickness (H) 
Basic Max Min  Max  Min Basic  Max Min 
8 0.1640 11/32 0.344 0.332 0.397 0.378 3/16 0.193 0.178
10 0.1900 3/8 0.375 0.362 0.433 0.413 13/64 0.203 0.187
1/4 0.2500 7/16 0.438 0.482 0.505 0.488 7/32 0.226 0.212
5/16 0.3125 1/2 0.500 0.489 0.577 0.557 17/64 0.273 0.258
3/8 0.3750 9/16 0.562 0.551 0.650 0.628 21/64 0.337 0.320
7/16 0.4375 11/16 0.688 0.675 0.794 0.768 3/8 0.385 0.365
 1/2 0.5000 3/4 0.750 0.736 0.866 0.840 7/16 0.448 0.427
9/16 0.5625 7/8 0.875 0.861 1.010 0.982 31/64 0.496 0.473
5/8 0.6250 15/16 0.938 0.922 1.083 1.051 35/64 0.559 0.535
3/4 0.7500 1-1/8 1.125 1.088 1.299 1.240 41/64 0.665 0.617
7/8 0.8750 1-5/16 1.312 1.269 1.516 1.447 3/4 0.776 0.724
1 1.0000 1-1/2 1.500 1.450 1.732 1.653 55/64 0.887 0.831

 

Two Way Reversible Lock Nuts: Performance & Mechanical Specs
Description Hex nut with two or three, round or rectangular indentations, compressed onto the flat sides of the nut equidistant from each other. The compressions create slightly distorted center threads resulting in a controlled locking action when the threads of the mating part become engaged. 
Applications This is the least expensive prevailing torque type of nut, designed for use with machine screws and low-carbon bolts. It allows for automatic assembly because the top and bottom of the nut are identical. It creates a locking action even without being fully threaded onto its mating screw.
Material

Nuts shall be made from a low-carbon steel which conforms to the following chemical composition requirements.

Carbon: 0.47% max.; Phosphorus: 0.12% max.; Sulfur: 0.23% max..
Core Hardness

Rockwell C28 maximum
Proof Load 

90,000 psi.
<