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  FASTENERS DIMENSIONAL DATA
HOLO-KROME SOCKET LOW HEAD CAP SCREWS
HOLO-KROME
LOW HEAD CAP SCREWS
Holo-Krome Socket Head Cap Screws Lowhead       Holo-Krome Socket Head Cap Screws Low Head
 
NOMINAL
SIZE
OR BASIC
SCREW DIAMETER		 A H J
T
 F
HEAD
DIAMETER 		HEAD
HEIGHT		 HEXAGON
SOCKET
SIZE 		KEY ENGAGEMENT FILLET
EXTENSION
MAX MIN. MAX. MIN. NOM. MIN.    
4 0.1120 0.183 0.178 0.056 0.053 0.0500 0.038 0.009 0.005
5 0.1250 0.205 0.200 0.062 0.059 1/16 0.0625 0.044 0.010 0.006
6 0.1380 0.226 0.221 0.069 0.066 1/16 0.0625 0.050 0.010 0.006
8 0.1640 0.270 0.265 0.082 0.079 5/64 0.0781 0.060 0.012 0.007
10 0.1900 0.312 0.307 0.095 0.092 3/32 0.0938 0.072 0.014 0.009
1/4 0.2500 0.375 0.369 0.125 0.121 1/8 0.1250 0.094 0.014 0.009
5/16 0.3125 0.437 0.431 0.156 0.152 5/32 0.1562 0.120 0.017 0.012
3/8 0.3750 0.562 0.556 0.187 0.182 3/16 0.1875 0.145 0.020 0.015
7/16 0.4375 0.625 0.618 0.218 0.213 7/32 0.2188 0.166 0.023 0.018
1/2 0.5000 0.750 0.743 0.250 0.244 1/4 0.2500 0.184 0.026 0.020
5/8 0.6250 0.875 0.867 0.312 0.306 5/16 0.3125 0.250 0.032 0.024
 
  1. THREAD LENGTH. On all stock lengths the last complete (full form) thread measured with a thread ring gage (having the thread chamfer and/or counterbore removed) extends to within two threads of the head. On other lengths and diameters the length of thread will conform to Socket Head Cap Screw thread lengths.
  2. SCREW LENGTH. The length of the screw is the distance measured on a line parallel to the axis, from the plane of the bearing surface under the head to the plane of the flat of the point.
    STANDARD LENGTH INCREMENTS, L
    NOMINAL SCREW LENGTH STANDARD SCREW LENGTH
    1/8 THRU 1/4 1/16
    1/4 THRU 1 1/8
    1 THRU 2 1/4


  3. THREADS. Threads are Class 3A UNRC and UNRF with Holo-Krome controlled radius root and radius runout. Class 3A threads do not provide a plating allowance. When plating is required it is recommended that Holo-Krome supply the parts plated.

  4. SOCKETS. Thermo Forging, a Holo-Krome patented process, provides accurately formed sockets without broaching chips. Because Thermo-Forging is not a machining process it does not shear metal grains and sockets can be deeper and much stronger.

    LENGTH TOLERANCES, L
    NOMINAL SCREW SIZE OTHRU 3/8
    INCLUSIVE     		1/2 AND 5/8
    INCLUSIVE
    NOMINAL SCREW LENGTH TOLERANCE ON LENGTH
    UP TO 1 INCH INCL. -0.03 -0.03
    OVER 1 IN CH TO 2-1/2 INCL. -0.04 -0.06




Caution: Information is for general reference only.
For more complete specifications consult the standards referenced, or contact us.