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ASME B 18.2.1 - 2012 Square Head Bolts [Table 1] (ASTM A307 / A354 / A394)

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Unit:
Thread Size
d
1/4 5/16 3/8
d
PP UNC
ds max
min
s Nominal Size
max
min
e max
min
k Nominal Size
max
min
r max
min
b L≤6
L＞6
0.2500 0.3125 0.3750
20 18 16
0.260 0.324 0.388
0.237 0.298 0.360
3/8 1/2 9/16
0.375 0.500 0.562
0.362 0.484 0.544
0.530 0.707 0.795
0.498 0.665 0.747
11/64 13/64 1/4
0.188 0.220 0.268
0.156 0.186 0.232
0.03 0.03 0.03
0.01 0.01 0.01
0.750 0.875 1.000
1.000 1.125 1.250
Alternative history ANSI/ASME B 18.2.1 - 1996 ASME B 18.2.1 - 2010 ASME B 18.2.1 - 2012
Suppliers
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  • Shanghai Kinsom Precision Hardware Co.,Ltd
    		•
    Contact: Tina Cheung
    Cellphone： +86-18114615363
    email： tina@ksfasteners.com
    material:carbon steel，copper，Stainless steel 304 ,316,aluminum;Specifications:M2-M20 , 8-32 ,1/4-20 ,10-24 etc;Nominal length:5-200mm;Surface treatment:according to customers' requirements；Zinc plated, Zinc nickel plated, Dacromet, polished, electrophoresis,ect.
  • NingBo ZhenHai Guisi Zhaoyang Hardware Screw Factory
    		•
    Contact: Mr.Fang
    Cellphone： +86-13806639241
    QQ： 點擊這裏給我發消息2881819532
    email： 2881819532@qq.com fhl@zyfastener.cn
    Material: carbon steel; Specifications: M5-M24; Length: 20mm~250mm;Surface treatment: nature, black, galvanized, rohs, hot galvanized, dacromet; Grade: 4.8~12.9

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