Hex Jam Nuts


  Hex Jam Nut imageHex Jam Nut image Here is Smitty checking to see if we are giving you all the information that you need

Hex Jam Nuts - ANSI / ASME B18.2.2 - 1987

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 5/32 .163 .150
5/16 .3125 1/2 .500 .489 .577 .557 3/16 .195 .180
3/8 .3750 9/16 .562 .551 .650 .628 7/32 .227 .210
7/16 .4375 11/16 .688 .675 .794 .768 1/4 .260 .240
1/2 .5000 3/4 .750 .736 .866 .840 5/16 .323 .302
9/16 .5625 7/8 .875 .851 1.010 .982 5/16 .324 .301
5/8 .6250 15/16 .938 .922 1.093 1.051 3/8 .387 .363
3/4 .7500 1-1/8 1.125 1.088 1.299 1.240 27/64 .446 .398
7/8 .8750 1-5/16 1.312 1.269 1.516 1.447 31/64 .510 .458
1 1.0000 1-1/2 1.500 1.450 1.732 1.653 35/64 .575 .519
1-1/8 1.1250 1-11/16 1.688 1.631 1.949 1.859 39/64 .639 .579
1-1/4 1.2500 1/7/8 1.875 1.812 2.165 2.066 23/32 .751 .687
1-3/8 1.3750 2-1/16 2.062 1.994 2.382 2.273 25/32 .815 .747
1-1/2 1.5000 2-1/4 2.250 2.175 2.598 2.480 27/32 .880 .808
1-3/4 1.7500 2-5/8 2.625 2.538 3.031 2.893 31/32 1.009 .929
2 2.0000 3 3.000 2.900 3.464 3.306 1-3/32 1.138 1.050
2-1/4 2.2500 3-1/2 3.500 3.388 4.041 3.862 1-13/64 1.251 1.155
2-1/2 2.5000 3-7/8 3.875 3.750 4.474 4.275 1-29/64 1.505 1.401



Hex Jam Nut Properties

Description A six sided internally threaded fastener which is only 2/3 he thickness of a full form nut.
Applications
& Advantages
Jam nuts are tightened against the work surface and a finished or heavy hex nut is tightened against the jam nut to keep it from loosening.
Material Steel: Nuts shall be made from a low carbon steel which conforms to the following chemical composition requirements: Phosphorus: .12% max Carbon: .47% max Sulfur: .23% max
Stainless: Nuts shall be made from one of the following austenitic stainless alloys" 303, 303SE, 304 or XM7, all of which have a chromium content of 18% and a nickel content of 8%.
Heat Treatment The austenitic alloys develop their strength through work hardening during the manufacturing process, as seen from their hardness properties below. The only heat 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.
Core Hardness Steel: Rockwell B68 - C32
Stainless: Rockwell B95 - C32
Proof Load Steel: Course thread: 54,000 psi Fine Thread: 48,000 psi
Stainless: 1/4 thru 1/2 inch - 60,000 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