Finished Hex Nuts

Grade 2
Mechanical & Physical
Properties
Galvanized
Mechanical & Physical
Properties
Stainless
Mechanical & Physical
Properties


Finished Hex Nuts - ANSI/ASME B18.2.2

Nominal Size
or Basic Major
Thread Diameter
F G H
Width
Across Flats
Width
Across Corners
Thickness
Basic Max Min Max Min Basic Max Min
1/4 .2500 7/16 .438 .428 .505 .488 7/32 .226 .212
5/16 .3125 1/2 .500 .489 .577 .557 17/64 .273 .258
3/8 .3750 9/16 .562 .551 .650 .628 21/64 .337 .320
7/16 .4375 11/16 .688 .675 .794 .768 3/8 .385 .365
1/2 .5000 3/4 .750 .736 .866 .840 7/16 .448 .427
9/16 .5625 7/8 .875 .861 1.010 .982 31/64 .496 .473
5/8 .6250 15/16 .938 .922 1.083 1.051 35/64 .559 .535
3/4 .7500 1-1/8 1.125 1.088 1.299 1.240 41/64 .665 .617
7/8 .8750 1-5/16 1.312 1.269 1.516 1.447 3/4 .776 .724
1 1.0000 1-1/2 1.500 1.450 1.732 1.653 55/64 .887 .831
1-1/8 1.1250 1-11/16 1.688 1.631 1.949 1.859 31/32 .999 .939
1-3/8 1.3750 2-1/16 2.062 1.994 2.382 2.273 1-11/64 1.206 1.138
1-1/2 1.500 2-1/4 2.250 2.175 2.598 2.480 1-9/32 1.317 1.245
1-5/8 1.6250 2-7/16 2.438 2.356 2.815 2.686 1-25/64 1.429 1.353
1-3/4 1.7500 2-5/8 2.625 2.538 3.031 2.893 1-1/2 1.540 1.460
2 2.0000 3 3.000 2.900 3.464 3.306 1-23/32 1.763 1.675
2-1/4 2.2500 3-3/8 3.375 3.263 3.897 3.719 1-15/16 1.986 1.890
2-1/2 2.5000 3-3/4 3.750 3.625 4.330 4.133 2-5/32 2.209 2.105
2-3/4 2.7500 4-1/8 4.125 3.988 4.763 4.546 2-3/8 2.431 2.319
3 3.0000 4-1/2 4.500 4.350 5.196 4.959 2-19/32 2.654 2.534



Grade 2 Nut Image

Grade 2 Nut Properties

Description A six sided internally threaded fastener with a thickness of (.875 x nominal thread diameter) and the width is (1.5 x nominal thread diameter).
Appication
& Advantaged
The most versatile and widely used nut design. Grade-2 nuts are for use with any low carbon screw or bolt that is not heat treated, with specified minimum tensile strenght of 74,00 psi or less.
Material A low carbon steel that comforms to the following:
Carbon: .47% maximum, Phosphorus: .12% maximum, Sulfur:.23% maximum
Hardness Rockwell B68 - C32
Proof Load Course Thread: 90,000 psi Fine Thread: 80,000 psi
Plating See plating page for plating information.



Steel Hot Dip Galvanized Nut Properties

Description A six sided internally threaded fastener with a thickness of (.875 x nominal thread diameter) and the width is (1.5 x nominal thread diameter). Made from steel with a galvanic zinc coating.
Appication
& Advantaged
The most versatile and widely used nut design. Grade-2 nuts are for use with any low carbon screw or bolt that is not heat treated, with specified minimum tensile strenght of 74,000 psi or less, and subjected to moisture, salt and other such corrosive conditions.
Material A low carbon steel that comforms to the following:
Carbon: .47% maximum, Phosphorus: .12% maximum, Sulfur:.23% maximum
Hardness Rockwell B68 - C32
Proof Load Course Thread: 68,000 psi Fine Thread: 60,000 psi
Plating See plating page for plating information.



Stainless Steel, 18-8 and 316, Nut Properties

Description A six sided internally threaded fastener with a thickness of (.875 x nominal thread diameter) and the width is (1.5 x nominal thread diameter). Made from austenitic alloys as decribed below.
Appication
& Advantaged
Designed to be used with stainless steel screws and bolts with a specified minimum tensile strength equal to or less than the specified proof stress of the matinf nut. Both types of stainless are corrosion resistant with the 316 stainless having a greater amount of corrosion resistance as well as superior strength at higher temperatures.
Material 18-8: Nut shall be made from one of the following austenitic alloys: 303, 303SE, 304, XM7, all of which are characterized as having a chromium content of 18% and a nickel content of 8-10%.

316: Nuts shall be made from 316 stainless steel, an austenitic alloy which differs from 18-8 by its molybdenum contentof 2-3% and a higher nickel content of 10-14%.
Heat Treatment The austenitic alloys develope their strength through work hardening during the manufacturing process, as seen from their hardness properties below. The only hjeat treatment normally available on austenitic stainless steel alloys is annealing, which is done at approximately 1900°F to a dead soft condition and is not normally thermally reversible.
Hardness 1/4 thru 5/8: Rockwell B95 - C32 3/4 thru 1 inch: Rockwell B80 - C32
Proof Load 1/4 thru 5/8: 100,000 psi Fine Thread: 85,000 psi
Plating See plating page for plating information.



Return to top of page

Grades 5 and 8 Finished Hex Nut Dimensions | Class 2B Internal Thread Dimensions



Smith Fastener Company • 8181 State Street, South Gate, California 90280
Phone: ( 323 ) 587-0382 • FAX: ( 323 ) 587-8712 • E-mail: sales@smithfast.com
Copyright © 2009 by Smith Fastener Company

Hitch Pins | Construction/Lifting | Blind Rivets | Dowel Pins | Cotter Pins | Nuts, Bolts, Screws, Washers
Threaded Inserts | Anchors | Pins | Automotive | Weatherhead Pipe Fittings | Cutting Tools