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FASTENERS
DIMENSIONAL DATA
HOLO-KROME 1960 SERIES SOCKET HEAD CAP SCREWS
DIMENSIONS IN INCHES |
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HOLO-KROME
1960 SERIES
SOCKET HEAD
CAP SCREWS
|
NOMINAL
SIZE
OR BASIC
SCREW DIAMETER |
D |
A |
H |
S
|
J |
T |
F |
LT |
BODY
DIAMETER |
HEAD
DIAMETER |
HEAD
HEIGHT |
HEAD
SIDE
HEIGHT |
HEXAGON
SOCKET
SIZE |
KEY
ENGAGEMENT |
FILLET
EXTENSION
ABOVE D |
THREAD
LENGTH |
| MAX |
MIN. |
MAX. |
MIN. |
MAX. |
MIN. |
MIN. |
MAX. |
NOM. |
MIN. |
MAX. |
MIN. |
| 0 |
0.0600 |
0.0600 |
0.0568 |
0.096 |
0.091 |
0.060 |
.057 |
0.054 |
0.050 |
0.025 |
0.007 |
0.003 |
.050 |
| 1 |
0.0730 |
0.0730 |
0.0695 |
0.118 |
0.112 |
0.073 |
0.070 |
0.066 |
1/16
0.062 |
0.031 |
0.007 |
0.003 |
0.52 |
| 2 |
0.0860 |
0.0860 |
0.0822 |
0.140 |
0.134 |
0.086 |
0.083 |
0.077 |
5/64
0.078 |
0.038 |
0.008 |
0.004 |
0.62 |
| 3 |
0.0990 |
0.0990 |
0.949 |
0.161 |
0.154 |
0.099 |
0.095 |
0.089 |
5/64
0.078 |
0.044 |
0.008 |
0.004 |
0.62 |
| 4 |
0.1120 |
0.1120 |
0.1075 |
0.183 |
0.176 |
0.112 |
0.108 |
0.101 |
3/32
0.094 |
0.051 |
0.009 |
0.005 |
0.75 |
| 5 |
0.1250 |
0.1250 |
0.1202 |
0.205 |
0.198 |
0.125 |
0.121 |
0.112 |
3/32
0.094 |
0.057 |
0.010 |
0.006 |
0.75 |
| 6 |
0.1380 |
0.1380 |
0.1329 |
0.226 |
0.218 |
0.138 |
0.134 |
0.124 |
7/64
0.109 |
0.064 |
0.010 |
0.006 |
0.75 |
| 8 |
0.1640 |
0.1640 |
0.1585 |
0.270 |
0.262 |
0.164 |
0.159 |
0.148 |
9/64
0.141 |
0.077 |
0.012 |
0.007 |
0.88 |
| 10 |
0.1900 |
0.1900 |
0.1840 |
0.312 |
0.303 |
0.190 |
0.185 |
0.171 |
5/32
0.156 |
0.090 |
0.014 |
0.009 |
0.88 |
| 1/4 |
0.2500 |
0.2500 |
0.2435 |
0.375 |
0.365 |
0.250 |
0.244 |
0.225 |
3/16
0.188 |
0.120 |
0.014 |
0.009 |
1.00 |
| 5/16 |
0.3125 |
0.3125 |
0.3053 |
0.469 |
0.457 |
0.312 |
0.306 |
0.281 |
1/4
0.250 |
0.151 |
0.017 |
0.012 |
1.12 |
| 3/8 |
0.3750 |
0.3750 |
0.3678 |
0.562 |
0.550 |
0.375 |
0.368 |
0.337 |
5/16
0.312 |
0.182 |
0.020 |
0.015 |
1.25 |
| 7/16 |
0.4375 |
0.4375 |
0.4294 |
0.656 |
0.642 |
0.438 |
0.430 |
0.394 |
3/8
0.375 |
0.213 |
0.023 |
0.018 |
1.38 |
| 1/2 |
0.5000 |
0.5000 |
0.4919 |
0.750 |
0.735 |
0.500 |
0.492 |
0.450 |
3/8
0.375 |
0.245 |
0.026 |
0.020 |
1.50 |
| 5/8 |
0.6250 |
0.6250 |
0.6163 |
0.938 |
0.921 |
0.625 |
0.616 |
0.562 |
1/2
0.500 |
0.307 |
0.032 |
0.024 |
1.75 |
| 3/4 |
0.7500 |
0.7500 |
0.7406 |
1.125 |
1.107 |
0.750 |
0.740 |
0.675 |
5/8
0.625 |
0.370 |
0.039 |
0.030 |
2.00 |
| 7/8 |
0.8750 |
0.8750 |
0.8647 |
1.312 |
1.293 |
0.875 |
0.864 |
0.787 |
3/4
0.750 |
0.432 |
0.044 |
0.034 |
2.25 |
| 1 |
1.0000 |
1.0000 |
0.9886 |
1.500 |
1.479 |
1.000 |
0.988 |
0.900 |
3/4
0.750 |
0.495 |
0.050 |
0.040 |
2.50 |
| 1-1/4 |
1.2500 |
1.2500 |
1.2336 |
1.875 |
1.852 |
1.250 |
1.236 |
1.125 |
7/8
0.875 |
0.620 |
0.060 |
0.050 |
3.12 |
| 1-1/2 |
1.5000 |
1.5000 |
1.4818 |
2.250 |
2.224 |
1.500 |
1.485 |
1.350 |
1
1.000 |
0.745 |
0.070 |
0.060 |
3.75 |
|
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- BODY
DIAMETER (D) r efers to the unthreaded cylindrical portion of
the screw.
- HEAD
CHAMFER (E). The heads shall be chamfered.
- SCREW
POINTS of sizes #10 and larger shall be chamfered
- FILLET
(F) for all lengths should extend above maximum value for (D)
within the tolerances listed for (F).
- THREADS.
Diameters to 1" are UNRC and UNRF, class 3A. Diameters over
1" are UNRC and UNRF, class 2A.
- MATERIAL.
(A) Steel, high grade alloy, hardened by quenching in oil
from the hardening temperature and tempered to a minimum hardness
of Rockwell C39 at the surface for sizes up to and including 1/2"
and Rockwell C37 for sizes over 1/2" diameter, per ASTM A574.
(B) Steel, corrosion resistant. Cap screws shall be fabricated
from austenitic corrosion resistant stell of type 302 HQ or equivalent
and conform to ASTM F837.
(C) Holo-Krome Standard Socket Head Cap Screws conform to
ASME/ANSI B18.3 and ASTM A574 or ASTM F837 as applicable.
-
LENGTH TOLERANCES
| Length
Tolerances |
Nominal
Screw Size |
| Lengths
(L) |
0
thru
3/8 |
7/16
thru
3/4 |
7/8
thru
2-1/2 |
| Up
to 1 in. Incl. |
-0.03 |
-0.03 |
-0.05 |
| Over
1 in. to 2-1/2" Incl. |
-0.04 |
-0.06 |
-0.10 |
| Over
2-1/2" to 6, Incl. |
-0.06 |
-0.08 |
-0.14 |
| Over
6 |
-0.12 |
-0.12 |
-0.20 |
-
THREAD LENGTH LT. the length of the thread shall be measured,
parallel to the axis of screw, from extreme point to the last
complete (full form) thread. Short length screws that do not have
a body will be threaded as follows
(A) Diameters #0 to 5/8" inclusive shall have a maximum of
2 imperfect threads under the head.
(B) Diameters above 5/8" shall be threaded as close to the
head as practical.
- GRIP GAGING LENGTH LG. The grip gaging length is the distance,
measured parallel to the axis of screw, from the bearing surface
of the head to the first complete (full form) thread under the
head. The LG value shall be measured from the bearing surface
of the head to the face of a GO thread ring gage, having the thread
countersink and/or counterbore removed, which has been assembled
by hand as far as the thread will permit.
For any screw length, LG determined by the formula
LG = Lnom - LT, represents the minimum design grip length.
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Caution: Information is for general reference only.
For more complete specifications consult the standards referenced, or contact us.
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