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





Smith Fastener Company • 3613 East Florence Avenue, Bell, California, 90201
Phone: ( 323 ) 587-0382 • FAX: ( 323 ) 587-8712 • E-mail: sales@smithfast.com
Copyright © 2009 by Smith Fastener Company

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