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Grade GT Flange Style Lock Nuts

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Grade GT Flange Style Lock Nuts - RB & W Corp
Nominal Size
or Basic Major
Thread Diameter		 F B H A K
Width Across Flats Flange
Diameter		 Overall Thickness Hex Height Flange
Thickness
Nom Max Min Max Max Min Min Min
1/4 7/16 .4385 .428 .560 .300 .265 .140 .040
5/16 1/2 .5020 .489 .680 .365 .320 .170 .050
3/8 9/16 .5645 .551 .810 .425 .404 .200 .060
7/16 11/16 .6895 .675 .930 .495 .457 .230 .070
1/2 3/4 .7520 .736 1.070 .555 .500 .260 .080
5/8 15/16 .9395 .922 1.330 .690 .646 .320 .100
3/4 1-1/8 1.1280 1.088 1.585 .825 .742 .380 .110
Product standards require all grade-marked nuts 1/4 inch and larger to have a raised or depresses insignia identifying its manufacturer. The X on the image above represents one such location.


Grade GT Flange Style Lock Nuts Properties
Description An all metal, one-piece flanged hex nut which gets its prevailing torque characteristics from controlled distortion of its top threads from their normal helical form to a more elliptical shape.
Applications
& Advantages		 Has a lower, more uniform bearing stress to clamp force ratio. This style reduces inventory (by eliminating a washer) and in-place cost. It is designed specifically for use with, but not exclusively, grade-8 frame bolts.
Material C1022 - 1045 steel
Heat Treatment Heated to the austenitizing temperature of the material and quenched in the proper medium to obtain a predominately martensitic microstructure, and tempered to the specified hardness.
Hardness 1/4 thru 5/8 inch: Rockwell C24 - C32
3/4 thru 1 inch: Rockwell C26 - C34
1/4 thru 5/8 inch: Rockwell C26 - C36
Proof Load 150,000 psi
Plating See plating page for plating information of steel nuts.

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See also:
Grade C Automation and Collar Style Lock Nuts and Nuts List


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Smith Fastener Company, A California Corporation - 3613 East Florence Avenue, Bell, California, 90201 - Phone: ( 323 ) 587-0382 and ( 800 ) 764-8488 - FAX: ( 323 ) 587-8712 - E-mail: sales@smithfast.com - Copyright © 2004 by Smith Fastener Company - Please report website problems to: WebMaster - Last updated: November 4th, 2004
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