ANSI/ASME B 18.3 - 2003 (R2008) Hexagon Socket Head Cap Screws


Unit: inch
Nominal Length L Tips:seclect Nominal Length L and get Thread length.
Screw Thread
d
0# 1# 2# 3# 4# 5# 6# 8# 10# 1/4 5/16 3/8 7/16 1/2 5/8 3/4
d Screw Diameter
PP UNC
UNF
UNEF
ds max=nominal size
min
dk max
min
k max
min
s Nominal Size
t min
b min
0.060 0.073 0.086 0.099 0.112 0.125 0.138 0.164 0.190 0.250 0.313 0.375 0.438 0.500 0.625 0.750
- 64.0 56.0 48.0 40.0 40.0 32.0 32.0 24.0 20.0 18.0 16.0 14.0 13.0 11.0 10.0
80.0 72.0 64.0 56.0 48.0 44.0 40.0 36.0 32.0 28.0 24.0 24.0 20.0 20.0 18.0 16.0
- - - - - - - - - 32.0 32.0 32.0 28.0 28.0 24.0 20.0
0.060 0.073 0.086 0.099 0.112 0.125 0.138 0.164 0.190 0.250 0.313 0.375 0.438 0.500 0.625 0.750
0.0568 0.0695 0.0822 0.0949 0.1075 0.1202 0.1329 0.1585 0.1840 0.2435 0.3053 0.3678 0.4294 0.4919 0.6163 0.7406
0.096 0.118 0.140 0.161 0.183 0.205 0.226 0.270 0.312 0.375 0.469 0.562 0.656 0.750 0.938 1.125
0.091 0.112 0.134 0.154 0.176 0.198 0.218 0.262 0.303 0.365 0.457 0.550 0.642 0.735 0.921 1.107
0.060 0.073 0.086 0.099 0.112 0.125 0.138 0.164 0.190 0.250 0.312 0.375 0.438 0.500 0.625 0.750
0.057 0.070 0.083 0.095 0.108 0.121 0.134 0.159 0.185 0.244 0.306 0.368 0.430 0.492 0.616 0.740
0.050 0.062 0.078 0.078 0.094 0.094 0.109 0.141 0.156 0.188 0.250 0.312 0.375 0.375 0.500 0.625
0.025 0.031 0.038 0.044 0.051 0.057 0.064 0.077 0.090 0.120 0.151 0.182 0.213 0.245 0.307 0.370
0.50 0.62 0.62 0.62 0.75 0.75 0.75 0.88 0.88 1.00 1.12 1.25 1.38 1.50 1.75 2.00
Length of Thread b
- - - - - - - - - - - - - - - -
Screw Thread
d
7/8 1 1-1/8 1-1/4 1-3/8 1-1/2 1-3/4 2 2-1/4 2-1/2 2-3/4 3 3-1/4 3-1/2 3-3/4 4
d Screw Diameter
PP UNC
UNF
UNEF
ds max=nominal size
min
dk max
min
k max
min
s Nominal Size
t min
b min
0.875 1.000 1.125 1.250 1.375 1.500 1.750 2.000 2.250 2.500 2.750 3.000 3.250 3.500 3.750 4.000
9.0 8.0 7.0 7.0 6.0 6.0 5.0 4.5 4.5 4.0 4.0 4.0 4.0 4.0 4.0 4.0
14.0 12.0 12.0 12.0 12.0 12.0 - - - - - - - - - -
20.0 20.0 18.0 18.0 18.0 18.0 - - - - - - - - - -
0.875 1.000 1.125 1.250 1.375 1.500 1.750 2.000 2.250 2.500 2.750 3.000 3.250 3.500 3.750 4.000
0.8647 0.9886 1.1086 1.2336 1.3568 1.4818 1.7295 1.9780 2.2280 2.4762 2.7262 2.9762 3.2262 3.4762 3.7262 3.9762
1.312 1.500 1.688 1.875 2.062 2.250 2.625 3.000 3.375 3.750 4.125 4.500 4.875 5.250 5.625 6.000
1.293 1.479 1.665 1.852 2.038 2.224 2.597 2.970 3.344 3.717 4.090 4.464 4.837 5.211 5.584 5.958
0.875 1.000 1.125 1.250 1.375 1.500 1.750 2.000 2.250 2.500 2.750 3.000 3.250 3.500 3.750 4.000
0.864 0.988 1.111 1.236 1.360 1.485 1.734 1.983 2.232 2.481 2.730 3.979 3.228 3.478 3.727 3.976
0.750 0.750 0.875 0.875 1.000 1.000 1.250 1.500 1.750 1.750 2.000 2.250 2.250 2.750 2.750 3.000
0.432 0.495 0.557 0.620 0.682 0.745 0.870 0.995 1.120 1.245 1.370 1.495 1.620 1.745 1.870 1.995
2.25 2.50 2.81 3.12 3.44 3.75 4.38 5.00 5.62 6.25 6.88 7.50 8.12 8.75 9.38 10.00
Length of Thread b
- - - - - - - - - - - - - - - -
Alternative history
Suppliers
You will get the best price if inform us the information comes from GlobalFastener.com.
1
China Mainland Ningbo XinChang Metal Products Co., Ltd.
Mobile Phone: +86-18668833133 Telephone: +86-574-62828345
Material: 302HQ, 304 (A2-70), 316C (A4-70, A4-80), 410, 430; Surface treatment: nature; Nominal diameter: M2.5-M8, #4-1/4; Nominal length: 5-100mm
Contact us via Email
2
China Mainland Ningbo Huashenyulu Fasteners Co., Ltd.
Miss Chen
Mobile Phone: +86-13957439600 Telephone: +86-574-86022688
Material: Stainless Steel 304, Stainless Steel 316, Alloy Steel, Brass, Aluminum Alloy, Titanium Alloy, Nylon; Specification: 6#~1; Length: 1/8~2; Surface Treatment: As Processed, Blackening, Environment-friendly Zinc Plating
Contact us via Email
3
China Mainland Nanjing Dongming Fasteners Co.,Ltd
Wang Jiajie
Mobile Phone: +86-13851939828 Telephone: +86-25-86183701-8026
Material: 304, 316 stainless steel; Grade: A2-70, A4-80; Complete Specifications
Contact us via Email
4
China Mainland Jiangsu YaGu Standard Parts Co., Ltd.
Mr. Chen
Mobile Phone: +86-13327786628 Telephone: +86-523-85218888/83190628
Material:304,304L,316,316L,8,8M,8T,8A,8MA,8TA;Grade:A2-70、A4-70、A4-80;Specification: 7/8”-3”
Contact us via Email
You will get the best price if inform us the information comes from GlobalFastener.com.
5
Auto Bolt Company America Auto Bolt Company
Tel:800.988.2658
Fax:216.881.3918
Contact us via Email
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