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Stainless Steel Socket Head Cap Bolts Featured Image
  • Stainless Steel Socket Head Cap Bolts
  • Stainless Steel Socket Head Cap Bolts

Stainless Steel Socket Head Cap Bolts

Overview:

Commodity: Stainless Steel Allen Head Bolts
Material: Made from 316 stainless steel, these screws have good chemical resistance and may be mildly magnetic. They are also known as A2 stainless steel.
Head Type: Socket Head.
Length: is measured from under the head.
Metric screws are also known as A2 stainless steel screws.
Thread Type: Coarse Thread, Fine Thread. Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.
Standard: Screws that meet ASME B1.1, ASME B18.3, ISO 21269, and ISO 4762 (formerly DIN 912) comply with standards for dimensions. Screws that meet ASTM B456 and ASTM F837 comply with standards for materials.


Specifications

Dimension Table

Why AYA

Product Description

Product Name  Stainless Steel Allen Head Bolts
Material  Made from 316 stainless steel, these screws have good chemical resistance and may be mildly magnetic. They are also known as A2 stainless steel.
Head Type  Socket Head
Length  Is measured from under the head
Thread Type  Coarse Thread, Fine Thread. Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch. Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.
Standard  Screws that meet ASME B18.2.1 or formerly DIN 933 specifications comply with these dimensional standards.
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    • Stainless Steel Allen Head Bolts-dimension table

    ISO 21269

    ASME B18.3

    Size 0# 1# 2# 3# 4# 5# 6# 8# 10# 12# 1/4 5/16
    d Screw Diameter 0.06 0.073 0.086 0.099 0.112 0.125 0.138 0.164 0.19 0.216 0.25 0.3125
    PP UNC - 64 56 48 40 40 32 32 24 24 20 18
    UNF 80 72 64 56 48 44 40 36 32 28 28 24
    UNEF - - - - - - - - - 32 32 32
    ds max=nominal size 0.06 0.073 0.086 0.099 0.112 0.125 0.138 0.164 0.19 0.216 0.25 0.3125
    min 0.0568 0.0695 0.0822 0.0949 0.1075 0.1202 0.1329 0.1585 0.184 0.2095 0.2435 0.3053
    dk max 0.096 0.118 0.14 0.161 0.183 0.205 0.226 0.27 0.312 0.324 0.375 0.469
    min 0.091 0.112 0.134 0.154 0.176 0.198 0.216 0.257 0.298 0.314 0.354 0.446
    k max 0.06 0.073 0.086 0.099 0.112 0.125 0.138 0.164 0.19 0.216 0.25 0.312
    min 0.057 0.07 0.083 0.095 0.108 0.121 0.134 0.159 0.185 0.21 0.244 0.306
    s Nominal Size 0.05 0.062 0.078 0.078 0.094 0.094 0.109 0.141 0.156 0.156 0.188 0.25
    t min 0.025 0.031 0.038 0.044 0.051 0.057 0.064 0.077 0.09 0.103 0.12 0.151
    b min 0.5 0.62 0.62 0.62 0.75 0.75 0.75 0.88 0.88 0.88 1 1.12
    c chamfer or radius 0.004 0.005 0.008 0.008 0.009 0.012 0.013 0.014 0.018 0.022 0.025 0.033
    r chamfer or radius 0.007 0.007 0.007 0.007 0.008 0.008 0.008 0.008 0.008 0.01 0.01 0.01
    w min 0.02 0.025 0.029 0.034 0.038 0.043 0.047 0.056 0.065 0.082 0.095 0.119
    Size 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1-1/8 1-1/4 1-3/8 1-1/2
    d Screw Diameter 0.375 0.4375 0.5 0.5625 0.625 0.75 0.875 1 1.125 1.25 1.375 1.5
    PP UNC 16 14 13 12 11 10 9 8 7 7 6 6
    UNF 24 20 20 18 18 16 14 12 12 12 12 12
    UNEF 32 28 28 24 24 20 20 20 18 18 18 18
    ds max=nominal size 0.375 0.4375 0.5 0.5625 0.625 0.75 0.875 1 1.125 1.25 1.375 1.5
    min 0.3678 0.4294 0.4919 0.5538 0.6163 0.7406 0.8647 0.9886 1.1086 1.2336 1.3568 1.4818
    dk max 0.562 0.656 0.75 0.843 0.938 1.125 1.312 1.5 1.688 1.875 2.062 2.25
    min 0.54 0.631 0.725 0.827 0.914 1.094 1.291 1.476 1.665 1.852 2.038 2.224
    k max 0.375 0.438 0.5 0.562 0.625 0.75 0.875 1 1.125 1.25 1.375 1.5
    min 0.368 0.43 0.492 0.554 0.616 0.74 0.864 0.988 1.111 1.236 1.36 1.485
    s Nominal Size 0.312 0.375 0.375 0.437 0.5 0.625 0.75 0.75 0.875 0.875 1 1
    t min 0.182 0.213 0.245 0.276 0.307 0.37 0.432 0.495 0.557 0.62 0.682 0.745
    b min 1.25 1.38 1.5 1.5 1.75 2 2.25 2.5 2.81 3.12 3.44 3.75
    c chamfer or radius 0.04 0.047 0.055 0.062 0.07 0.085 0.1 0.114 0.129 0.144 0.16 0.176
    r chamfer or radius 0.01 0.015 0.015 0.015 0.015 0.015 0.02 0.02 0.02 0.02 0.02 0.02
    w min 0.143 0.166 0.19 0.214 0.238 0.285 0.333 0.38 0.428 0.475 0.523 0.57

     

    Size 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 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4
    PP UNC 5 4.5 4.5 4 4 4 4 4 4 4
    UNF - - - - - - - - - -
    UNEF - - - - - - - - - -
    ds max=nominal size 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4
    min 1.7295 1.978 2.228 2.4762 2.7262 2.9762 3.2262 3.4762 3.7262 3.9762
    dk max 2.625 3 3.375 3.75 4.125 4.5 4.875 5.25 5.625 6
    min 2.597 2.97 3.344 3.717 4.09 4.464 4.837 5.211 5.584 5.958
    k max 1.75 2 2.25 2.5 2.75 3 3.25 3.5 3.75 4
    min 1.734 1.983 2.232 2.481 2.73 2.979 3.228 3.478 3.727 3.976
    s Nominal Size 1.25 1.5 1.75 1.75 2 2.25 2.25 2.75 2.75 3
    t min 0.87 0.995 1.12 1.245 1.37 1.495 1.62 1.745 1.87 1.995
    b min 4.38 5 5.62 6.25 6.88 7.5 8.12 8.75 9.38 10
    c chamfer or radius 0.207 0.238 0.269 0.3 0.332 0.363 0.394 0.426 0.458 0.489
    r chamfer or radius 0.02 0.02 0.036 0.036 0.036 0.036 0.036 0.036 0.036 0.036
    w min 0.665 0.76 0.855 0.95 1.045 1.14 1.235 1.33 1.425 1.52
    Screw Thread M8 M10 M12 M14 M16 M20 M24 M30 M36 M42 M48 M56 M64
    d
    P Pitch Fine thread -1 1 1.25 1.5 1.5 1.5 2 2 2 3 3 3 4 4
    Fine thread -2 / 1 1.25 / / 1.5 / / / / / / /
    dk max For plain heads 13 16 18 21 24 30 36 45 54 63 72 84 96
    For knurled heads 13.27 16.27 18.27 21.33 24.33 30.33 36.39 45.39 54.46 63.46 72.46 84.54 96.54
    min 12.73 15.73 17.73 20.67 23.67 29.67 35.61 44.61 53.54 62.54 71.54 83.46 95.46
    ds max 8 10 12 14 16 20 24 30 36 42 48 56 64
    min 7.78 9.78 11.73 13.73 15.73 19.67 23.67 29.67 35.61 41.61 47.61 55.54 63.54
    k max 8 10 12 14 16 20 24 30 36 42 48 56 64
    min 7.64 9.64 11.57 13.57 15.57 19.48 23.48 29.48 35.38 41.38 47.38 56.26 63.26
    s Nominal Size 6 8 10 12 14 17 19 22 27 32 36 41 46
    max 6.14 8.175 10.175 12.212 14.212 17.23 19.275 22.275 27.275 32.33 36.33 41.33 46.33
    min 6.02 8.025 10.025 12.032 14.032 17.05 19.065 22.065 27.065 32.08 36.08 41.08 46.08
    t min 4 5 6 7 8 10 12 15.5 19 24 28 34 38

    ISO 4762

    Screw Thread M1.6 M2 M2.5 M3 M4 M5 M6 M8 M10 M12
    d
    P Pitch 0.35 0.4 0.45 0.5 0.7 0.8 1 1.25 1.5 1.75
    dk max For plain heads 3 3.8 4.5 5.5 7 8.5 10 13 16 18
    For knurled heads 3.14 3.98 4.68 5.68 7.22 8.72 10.22 13.27 16.27 18.27
    min 2.86 3.62 4.32 5.32 6.78 8.28 9.78 12.73 15.73 17.73
    da max 2 2.6 3.1 3.6 4.7 5.7 6.8 9.2 11.2 13.7
    ds max 1.6 2 2.5 3 4 5 6 8 10 12
    min 1.46 1.86 2.36 2.86 3.82 4.82 5.82 7.78 9.78 11.73
    e min 1.733 1.733 2.303 2.873 3.443 4.583 5.723 6.863 9.149 11.429
    k max 1.6 2 2.5 3 4 5 6 8 10 12
    min 1.46 1.86 2.36 2.86 3.82 4.82 5.7 7.64 9.64 11.57
    s Nominal Size 1.5 1.5 2 2.5 3 4 5 6 8 10
    max 1.58 1.58 2.08 2.58 3.08 4.095 5.14 6.14 8.175 10.175
    min 1.52 1.52 2.02 2.52 3.02 4.02 5.02 6.02 8.025 10.025
    t min 0.7 1 1.1 1.3 2 2.5 3 4 5 6
    w min 0.55 0.55 0.85 1.15 1.4 1.9 2.3 3.3 4 4.8
    Screw Thread (M14) M16 M20 M24 M30 M36 M42 M48 M56 M64
    d
    P Pitch 2 2 2.5 3 3.5 4 4.5 5 5.5 6
    dk max For plain heads 21 24 30 36 45 54 63 72 84 96
    For knurled heads 21.33 24.33 30.33 36.39 45.39 54.46 63.46 72.46 84.54 96.54
    min 20.67 23.67 29.67 35.61 44.61 53.54 62.54 71.54 83.46 95.46
    da max 15.7 17.7 22.4 26.4 33.4 39.4 45.6 52.6 63 71
    ds max 14 16 20 24 30 36 42 48 56 64
    min 13.73 15.73 19.67 23.67 29.67 35.61 41.61 47.61 55.54 63.54
    e min 13.716 15.996 19.437 21.734 25.154 30.854 36.571 41.131 46.831 52.531
    k max 14 16 20 24 30 36 42 48 56 64
    min 13.57 15.57 19.48 23.48 29.48 35.38 41.38 47.38 55.26 63.26
    s Nominal Size 12 14 17 19 22 27 32 36 41 46
    max 12.212 14.212 17.23 19.275 22.275 27.275 32.33 36.33 41.33 46.33
    min 12.032 14.032 17.05 19.065 22.065 27.065 32.08 36.08 41.08 46.08
    t min 7 8 10 12 15.5 19 24 28 34 38
    w min 5.8 6.8 8.6 10.4 13.1 15.3 16.3 17.5 19 22

    DIN 912

    Screw Thread (M14) M16 M20 M24 M30 M36 M42 M48 M56 M64
    d
    P Pitch 2 2 2.5 3 3.5 4 4.5 5 5.5 6
    dk max For plain heads 21 24 30 36 45 54 63 72 84 96
    For knurled heads 21.33 24.33 30.33 36.39 45.39 54.46 63.46 72.46 84.54 96.54
    min 20.67 23.67 29.67 35.61 44.61 53.54 62.54 71.54 83.46 95.46
    da max 15.7 17.7 22.4 26.4 33.4 39.4 45.6 52.6 63 71
    ds max 14 16 20 24 30 36 42 48 56 64
    min 13.73 15.73 19.67 23.67 29.67 35.61 41.61 47.61 55.54 63.54
    e min 13.716 15.996 19.437 21.734 25.154 30.854 36.571 41.131 46.831 52.531
    k max 14 16 20 24 30 36 42 48 56 64
    min 13.57 15.57 19.48 23.48 29.48 35.38 41.38 47.38 55.26 63.26
    s Nominal Size 12 14 17 19 22 27 32 36 41 46
    max 12.212 14.212 17.23 19.275 22.275 27.275 32.33 36.33 41.33 46.33
    min 12.032 14.032 17.05 19.065 22.065 27.065 32.08 36.08 41.08 46.08
    t min 7 8 10 12 15.5 19 24 28 34 38
    w min 5.8 6.8 8.6 10.4 13.1 15.3 16.3 17.5 19 22
    Screw Thread M12 (M14) M16 (M18) M20 (M22) M24 (M27) M30 (M33)
    d
    P Pitch Coarse thread 1.75 2 2 2.5 2.5 2.5 3 3 3.5 3.5
    Fine thread pitch-1 1.25 1.5 1.5 1.5 1.5 1.5 2 2 2 2
    Fine thread pitch-2 1.5 - - 2 2 2 - - - -
    dk plain head max 18 21 24 27 30 33 36 40 45 50
    knurled heads max 18.27 21.33 24.33 27.33 30.33 33.39 36.39 40.39 45.39 50.39
    min 17.73 20.67 23.67 26.67 29.67 32.61 35.61 39.61 44.61 49.61
    da max 13.7 15.7 17.7 20.2 22.4 24.4 26.4 30.4 33.4 36.4
    ds max 12 14 16 18 20 22 24 27 30 33
    min 11.73 13.73 15.73 17.73 19.67 21.67 23.67 26.67 29.67 32.61
    e min 11.43 13.72 16 16 19.44 19.44 21.73 21.73 25.15 27.43
    k max 12 14 16 18 20 22 24 27 30 33
    min 11.57 13.57 15.57 17.57 19.48 21.48 23.48 26.48 29.48 32.38
    s Nominal Size 10 12 14 14 17 17 19 19 22 24
    min 10.025 12.032 14.032 14.032 17.05 17.05 19.065 19.065 22.065 24.065
    max 10.175 12.212 14.212 14.212 17.23 17.23 19.275 19.275 22.275 24.275
    t min 6 7 8 9 10 11 12 13.5 15.5 18
    w min 4.8 5.8 6.8 7.8 8.6 9.4 10.4 11.9 13.1 13.5
    Screw Thread M36 M42 M48 M56 M64 M72 M80 M90 M100
    d
    P Pitch Coarse thread 4 4.5 5 5.5 6 6 6 6 6
    Fine thread pitch-1 3 3 3 4 4 4 4 4 4
    Fine thread pitch-2 - - - - - - - - -
    dk plain head max 54 63 72 84 96 108 120 135 150
    knurled heads max 54.46 63.46 72.46 84.54 96.54 108.54 120.54 135.63 150.63
    min 53.54 62.54 71.54 83.46 95.46 107.46 119.46 134.37 149.37
    da max 39.4 45.5 52.6 63 71 79 87 97 107
    ds max 36 42 48 56 64 72 80 90 100
    min 35.61 41.61 47.61 55.54 63.54 71.54 79.54 89.46 99.46
    e min 30.85 36.57 41.13 46.83 52.53 62.81 74.21 85.61 97.04
    k max 36 42 48 56 64 72 80 90 100
    min 35.38 41.38 47.38 55.26 63.26 71.26 79.26 89.13 99.13
    s Nominal Size 27 32 36 41 46 55 65 75 85
    min 27.065 32.08 36.08 41.08 46.08 55.1 65.1 75.1 85.12
    max 27.275 32.33 36.33 41.33 46.33 55.4 65.4 75.4 85.47
    t min 19 24 28 34 38 43 48 54 60
    w min 15.3 16.3 17.5 19 22 25 27 32 34

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