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Hexagon Socket Button Head Cap Screws

ASME B 18.3 - 2003 (R2008)

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美标ASME B18.3 - 2003 (R2008) ASME18.3 18. Hexagon Socket Button Head Cap Screws

 *Models with different eras.

Screw Thread
d
0# 1# 2# 3# 4# 5# 6# 8# 10# 1/4 5/16 3/8 1/2 5/8
d Nominal Diameter
PP UNC
UNF
UNEF
dk max
min
k max
min
s Nominal Size
t min
L max
0.060 0.073 0.086 0.099 0.112 0.125 0.138 0.164 0.190 0.250 0.3125 0.375 0.500 0.625
- 64.0 56.0 48.0 40.0 40.0 32.0 32.0 24.0 20.0 18.0 16.0 13.0 11.0
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 18.0
- - - - - - - - - 32.0 32.0 32.0 28.0 24.0
0.114 0.139 0.164 0.188 0.213 0.238 0.262 0.312 0.361 0.437 0.547 0.656 0.875 1.000
0.104 0.129 0.154 0.176 0.201 0.226 0.250 0.298 0.347 0.419 0.527 0.636 0.851 0.970
0.032 0.039 0.046 0.052 0.059 0.066 0.073 0.087 0.101 0.132 0.166 0.199 0.265 0.331
0.026 0.033 0.038 0.044 0.051 0.058 0.063 0.077 0.091 0.122 0.152 0.185 0.245 0.311
0.035 0.050 0.050 0.062 0.062 0.078 0.078 0.094 0.125 0.156 0.188 0.219 0.312 0.375
0.020 0.028 0.028 0.035 0.035 0.044 0.044 0.052 0.070 0.087 0.105 0.122 0.175 0.210
0.50 0.50 0.50 0.50 0.50 0.50 0.63 0.75 1.00 1.00 1.00 1.25 2.00 2.00

Suppliers

Best price if from GlobalFastener.com.
Shanghai ATM Precision Fastening Technology Co., Ltd.
  • Xu Hai

  • +86-18621311857

  • +86-21-59766477

  • Materials: 301, 302, 303, 304, 304L, 316, 316L, 316Ti, 317L, 310S, 321, 347, 1.4529, 1.4539, 1.4462, 1.4547, 1.4980, 904L, 2205, 2507, 2520, S32750, S32760, 1Cr13, 1Cr17, 2Cr13, 3Cr13, 14Cr17Ni2, 410, 416, 420, 430, 431, 440, 630, 631, 17-4PH, MP35N, 600, 601, 625, 660, 718, 750, 800, 825, 925, 926, C22, C276, A286, GH2132, GH4033, GH4080, GH4169, GH4145, 9C18Mo, 4Cr10Si2Mo, 35CrMoA, 42CrMoA, 40CrNiMoA, 25Cr2Mo1VA, SCM435, SCM440, 4130, 4140, 4145, A36, A307, A320, A325, A490, A574, F1554; stainless steel, alloy steel, titanium alloys, nickel-based alloys, high-temperature alloys, corrosion-resistant alloys, nickel-cobalt alloys, special alloys, and other special materials per customer specifications. Grades: A1-50, A2-50, A2-70, A2-80, A3-70, A4-70, A4-80, A4-90, A4-100, A5-80, B8, B8M, B8C, B8T, B6, B7, B7M, B16, C1-50, C1-70, C1-110, C3-80, C3-120, C4-70, D2-80, D2-100, D4-80, D4-100, D6-80, D6-100, D8-80, D8-100, P1-90, P1-120, F51, F53, F55, F60, 10.9, 12.9, 14.9, 15.9, 16.9; Other grades available upon request. Specifications: M3–M120, 1/4"–4". No limitation on product diameter or length; custom non-standard parts can be manufactured upon request. Surface Treatments: passivation, black oxide, phosphating, electrophoretic coating, zinc plating, nickel plating, chrome plating, cadmium plating, gold plating, silver plating, tin plating, copper plating, zinc diffusion, marine zinc, aluminum diffusion, aluminum spraying, Dacromet, Geomet, Teflon coating, zinc-nickel alloy plating, nickel-cobalt alloy plating, hot-dip galvanizing, ceramic composite coatings, molybdenum disulfide coating, tungsten disulfide coating, nano-coatings, and other surface finishes per customer requirements.

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