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Unit:inch

Lobed Head Screws [Table 9]

ASME B 18.2.1 (T9) - 2012

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美标ASME B18.2.1 (T9) - 2012 ASME18.2.1 18 Lobed Head Screws [Table 9]
Calculate weight and price. Weight 1000 pcs : kg x $ per kg = $ 1000 pcs
Default density g/cm3
×

Choose materials based on density.(g/cm3)

  • Carbon Steel 7.85
  • Stainless Steel 8.1
  • Stainless Steel 7.95
  • Stainless Steel 7.7
  • Titanium Alloy 4.5
  • Aluminum Alloy 2.8
  • Copper 8.89


Select here or enter material density on the calculation page.
Nominal Length L Tips:seclect Nominal Length L and get Weight Thread length.
Screw Thread
d
1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1-1/8 1-1/4 1-3/8
PP UNC
dk Ref.
k max
min
h max
min
dc max
min
B max
Drive Size
ds max
min
b L≤6
L＞6
r max
min
20 18 16 14 13 12 11 10 9 8 7 7 6
0.287 0.362 0.431 0.499 0.571 0.645 0.715 0.86 1 1.138 1.28 1.42 1.562
0.255 0.323 0.394 0.472 0.515 0.551 0.63 0.787 0.866 1.063 1.181 1.299 1.417
0.245 0.313 0.384 0.462 0.505 0.541 0.62 0.777 0.856 1.053 1.171 1.289 1.407
0.07 0.1 0.125 0.155 0.16 0.165 0.2 0.255 0.27 0.355 0.382 0.422 0.453
0.06 0.09 0.115 0.145 0.15 0.153 0.188 0.243 0.26 0.343 0.37 0.41 0.441
0.375 0.469 0.562 0.656 0.75 0.844 0.938 1.125 1.312 1.5 1.688 1.875 2.062
0.365 0.457 0.55 0.642 0.735 0.828 0.921 1.107 1.293 1.479 1.665 1.852 2.038
0.2073 0.2663 0.3103 0.3613 0.4113 0.4663 0.5183 0.6183 0.7193 0.8393 0.9433 1.0463 1.1513
E8 E10 E12 E14 E16 E18 E20 E24 E28 E32 E36 E40 E44
0.25 0.3125 0.375 0.4375 0.5 0.5625 0.625 0.75 0.875 1 1.125 1.25 1.375
0.245 0.3065 0.369 0.4305 0.493 0.5545 0.617 0.741 0.866 0.99 1.114 1.239 1.363
0.75 0.875 1 1.125 1.25 1.375 1.5 1.75 2 2.25 2.5 2.75 3
1 1.125 1.25 1.375 1.5 1.625 1.75 2 2.25 2.5 2.75 3 3.25
0.025 0.025 0.025 0.025 0.025 0.45 0.45 0.45 0.065 0.095 0.095 0.095 0.095
0.015 0.015 0.015 0.015 0.015 0.02 0.02 0.02 0.04 0.06 0.06 0.06 0.06
Weight of per 1000 steel products(≈kg) Reference only
- - - - - - - - - - - - -
Length of Thread b Reference only
- - - - - - - - - - - - -
①,b is a reference dimension tntended for calculation purposes only. When screw length L ≤ 6 in，b=2d+0.25；when L＞6 in，b=2d+0.5 。

Alternative history

ASME B 18.2.1T9 - 2010 ASME B 18.2.1T9 - 2012
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