• 中文名稱:英制研磨螺絲, 研磨內六角螺絲, 等高螺絲
  • 依據標準:ASME B18.3- 2002
  • 材質:合金鋼 SCM435
  • 硬度:HRC 32~43
  • 表面處理:黑色氧化膜
  • 螺紋種類:ANSI B1.1 UNC
  • 螺紋等級:ANSI B1.1 Class 3A

Unit:inch

Nominal Size
of Basic
Shoulder Diameter
D A H D1 E T J
Shoulder Diameter Head Diameter Head Height Nominal Thread
Size of Basic
Thread Diameter
Threads Per
Inch
Thread
Length
Key
Engage-ment
Hexagon
Socket Size
Max. Min. Max. Min. Max. Min. Basic Min. Nominal
1/4 0.2480 0.2460 0.375 0.357 0.188 0.177 10
0.1900
24 0.375 0.094 1/8
0.125
5/16 0.3105 0.3085 0.438 0.419 0.219 0.209 1/4
0.2500;
20 0.438 0.117 5/32
0.156
3/8 0.3730 0.3710 0.562 0.543 0.250 0.240 5/16
0.3125
18 0.500 0.141 3/16
0.188
1/2 0.4980 0.4960 0.750 0.729 0.312 0.302 3/8
0.3750
16 0.625 0.188 1/4
0.250
5/8 0.6230 0.6210 0.875 0.853 0.375 0.365 1/2
0.5000
13 0.750 0.234 5/16
0.312
3/4 0.7480 0.7460 1.000 0.977 0.500 0.490 5/8
0.6250
11 0.875 0.281 3/8
0.375
1 0.9980 0.9960 1.312 1.287 0.625 0.610 3/4
0.7500
10 1.000 0.375 1/2
0.500