• 中文名稱:英制外六角螺絲, 六角頭螺絲
  • 依據標準:ASNI/ASME B 18.2.1-1996
  • 材質:合金鋼 SAE4135;碳鋼 SAE1035;不鏽鋼 304
  • 強度等級: Grade8;Grade5
  • 硬度(HRC):39~44;22~34
  • 表面處理:黑色氧化膜, 鍍鎳, 鍍鋅, 鍍三價鋅, 耐落處理

Unit:inch

Nominal Size
or Basic
Product Dia
E F G H J LT Y Runout of
Bearing
Surface
FIM
Body Dia Width Across Flats Width
Across Corners
Height Wrench-ing
Height
Thread Length
For Screw Length
Transition
Thread
Length
6 in.and
Shorter
Over 6 in.
Max. Min. Basic Max. Min. Max. Min. Basic Max. Min. Min. Basic Basic Max. Max.
1/4
0.2500
0.2500 0.2450 7/16 0.438 0.428 0.505 0.488 5/32 0.163 0.150 0.106 0.750 1.000 0.250 0.010
5/16
0.3125
0.3125 0.3065 1/2 0.500 0.489 0.577 0.557 13/64 0.211 0.195 0.140 0.875 1.125 0.278 0.011
3/8
0.3750
0.3750 0.3690 9/16 0.562 0.551 0.650 0.628 15/64 0.243 0.226 0.160 1.000 1.250 0.312 0.012
7/16
0.4375
0.4375 0.4305 5/8 0.625 0.612 0.722 0.698 9/32 0.291 0.272 0.195 1.125 1.375 0357 0.013
1/2
0.5000
0.5000 0.4930 3/4 0.750 0.736 0.866 0.840 5/16 0.323 0.302 0.215 1.250 1.500 0.385 0.014
9/16
0.5625
0.5625 0.5545 13/16 0.812 0.798 0.938 0.910 23/64 0.371 0.348 0.250 1.375 1.625 0.417 0.015
5/8
0.6250
0.6250 0.6170 15/16 0.938 0.922 1.083 1.051 25/64 0.403 0.378 0.269 1.500 1.750 0.455 0.017
3/4
0.7500
0.7500 0.7410 1-1/8 1.125 1.100 1.299 1.254 15/32 0.483 0.455 0.324 1.750 20... 0.500 0.020
7/8
0.8750
0.8750 0.8660 1-5/16 1.312 1.285 1.516 1.465 35/64 0.563 0.531 0.378 2.000 2.250 0.556 0.023
1
1.0000
1.0000 0.9900 1-1/2 1.500 1.469 1.732 1.675 39/64 0.627 0.591 0.416 2.250 2.500 0.625 0.026