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Socket Shoulder Screws
Dimensions and Specifications



Dimensions for Alloy Steel Socket Shoulder Screws / Stripper Bolts - ASME B18.3-1988
Nom
Size		 D A H C J T M R K F
Shoulder
Diameter		 Head
Diameter		 Head
Height		 Chamfer
or
Radius		 Hex
Socket
Size		 Key
Engage-
ment		 Fillet
Transition
Diameter		 Head
Fillet
Radius		 Shoulder
Neck
Diameter		 Shoulder
Neck
Width
Max Min Max Min Max Min Min Nom Min Max Min Min Max
1/4 .2480 .2460 .375 .357 .188 .177 .020 1/8 .094 .276 .009 .227 .093
5/16 .3105 .3085 .438 .419 .219 .209 .026 5/32 .117 .345 .012 .289 .093
3/8 .3730 .3710 .562 .543 .250 .240 .031 3/16 .141 .413 .015 .352 .093
1/2 .4980 .4960 .750 .729 .312 .302 .040 1/4 .188 .550 .020 .477 .093
5/8 .6230 .6210 .875 .853 .375 .365 .050 5/16 .234 .687 .024 .602 .093
3/4 .7480 .7460 1.000 .977 .500 .490 .069 3/8 .281 .826 .030 .727 .093

Nominal
Size		 D1 Threads
Per
Inch		 G I N *E Thread
Section
Tensile
Strength
(Lbs)		 Single Shear
Strength (Lbs)		 Seating
Torque
(Inch Lbs)
Nominal
Thread
Size		 Thread Neck
Diameter		 Thread
Neck
Width		 Thread Neck
Fillet		 Thread
Length		 Shoulder Thread Neck
Max Min Max Min Basic Min Min Min
1/4 10 24 .142 .033 .083 .023 .017 .375 2,540 4,515 1,250 50
5/16 1/4 20 .193 .182 .100 .028 .022 .438 4,610 7,100 2,340 125
3/8 5/16 18 .249 .237 .111 .031 .025 .500 7,600 10,280 3,970 265
1/2 3/8 16 .304 .291 .125 .035 .029 .625 11,240 18,350 5,985 470
5/8 1/2 13 .414 .397 .154 .042 .036 .750 20,570 28,785 11,140 1,150
3/4 5/8 11 .521 .502 .182 .051 .045 .875 32,770 41,515 17,800 2,000
* Tolerance = 3/8" and smaller = -.020, Greater than 3/8" -.030

  • Applications For rotating or sliding applications, such as pulley shafts, punch and die work or as a bearing pin. Also known as Stripper Bolts.
  • Material Made from Alloy Steel having one or more of the following elements: chromium, nickel, molybdenum or vanadium, in sufficient quantity to assure the specified hardness.
  • Heat Treatment: Heat-treated by oil quenching from above the transformation temperature and then tempered at a temperature not lower than 650°F
  • Hardness: Rockwell c32-34
  • Tensile Strength: 140,000 psi minimum (material only)
  • Yield Strength: 120,000 psi minimum (material only)
  • Elongation: 15% minimum (Applies to all machined specimens of a length that is at least 4 times the nominal diameter of the screw.
  • Reduction of Area: 45% minimum (applies to all machined specimens)
  • Plating: Usually supplied with a plain finish.

How To Order

D x L - Example: 3/4 x 5-1/2 for a 3/4" Dia. x 5-1/2" Long Shoulder

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Shoulder Bolts
Smith Fastener Company, A California Corporation - 3613 East Florence Avenue, Bell, California, 90201 - Phone: ( 323 ) 587-0382 - FAX: ( 323 ) 587-8712 - E-mail: sales@smithfast.com - Copyright © 2000 by Smith Fastener Company - Last updated: May 19th, 2006 - http://www.smithfast.com/shoulderscrew.htm