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Dimensions of Machine Screw Nuts:  Hex  &  Square patternHex Machine Screw Nuts             Square Machine Screw Nuts
Square and Hex Machine Screw Pattern Nuts
Nominal or 
Basic Major 
Diameter of 
Thread
F G G1 H
Width Across Flats
(Wrench Size)
Width Across Corners Thickness
Square Hex
Basic Max Min Max Min Max Min Max Min
2 0.0860 3/16 0.188 0.180 0.265 0.247 0.217 0.205 0.066 0.057
3 0.0990 3/16 0.188 0.180 0.265 0.247 0.217 0.205 0.066 0.057
4 0.1120 1/4 0.250 0.241 0.354 0.331 0.289 0.275 0.098 0.087
5 0.1250 5/16 0.312 0.302 0.442 0.415 0.361 0.344 0.114 0.102
6 0.1380 5/16 0.312 0.302 0.442 0.415 0.361 0.344 0.114 0.102
8 0.1640 11/32 0.344 0.332 0.486 0.456 0.397 0.378 0.130 0.117
10 0.1900 3/8 0.375 0.362 0.530 0.497 0.433 0.413 0.130 0.117
12 0.2160 7/16 0.438 0.423 0.619 0.581 0.505 0.482 0.161 0.148
1/4 0.2500 7/16 0.438 0.423 0.619 0.581 0.505 0.482 0.193 0.178
5/16 0.3125 9/16 0.562 0.545 0.795 0.748 0.650 0.621 0.225 0.208
3/8 0.3750 5/8 0.625 0.607 0.884 0.833 0.722 0.692 0.257 0.239

 

 


God Bless America

Fairbury Fastener
23092 E. 800 North Rd. / U.S. Rt 24 East
Fairbury, IL 61739
Phone:  (815) 692-3848
  
FAX:  (815) 692-2200
E- Mail: 
sales @ fairbury fastener . com

Call 815-692-3848
to place your order

We do NOT process international orders.  Prices are subject to change and may be different than shown on our site.  
Call for current pricing.
 All Returns subject to restocking.

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