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Hex Head Machine Screws

Hex Head Machine Screws

Hex head machine screws have a finer thread and are designed to be threaded into a pre-tapped hole or used with a nut. They are often used in applications where components need to be fastened together with a flush surface, such as in machinery, appliances, and electronic equipment.
The heads of hex head machine screws are smaller and more compact compared to bolts, as they are designed to fit into tight spaces and provide a flush finish when tightened.

Hex head machine screws are available in standard sizes, but they may have more limited options compared to bolts due to their specific application. Sizes range from #2 to ½”.

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Specifications & Technical Data

Dimensions

A W H F U J T
Width Across Flats Width Across Corners Height of Head Diameter of Washer Thickness of Washer Width of Slot Depth of Slot
Nominal Size Max Min Min Max Min Max Min Max Min Max Min Max Min
2 0.125 0.120 0.134 0.050 0.040 0.166 0.154 0.016 0.010 — — — —
4 0.188 0.181 0.202 0.060 0.049 0.243 0.225 0.019 0.011 0.039 0.031 0.042 0.025
5 0.188 0.181 0.202 0.070 0.058 0.260 0.240 0.025 0.015 0.043 0.035 0.049 0.030
6 0.250 0.244 0.272 0.093 0.080 0.328 0.302 0.025 0.015 0.048 0.039 0.053 0.033
8 0.250 0.244 0.272 0.110 0.096 0.348 0.322 0.031 0.019 0.054 0.045 0.074 0.052
10 0.312 0.305 0.340 0.120 0.105 0.414 0.384 0.031 0.019 0.060 0.050 0.080 0.057
12 0.312 0.305 0.340 0.155 0.139 0.432 0.398 0.039 0.022 0.067 0.056 0.103 0.077
1/4 0.375 0.367 0.409 0.190 0.172 0.520 0.480 0.050 0.030 0.075 0.064 0.111 0.083
5/16 0.500 0.489 0.545 0.230 0.208 0.676 0.624 0.055 0.035 0.084 0.072 0.134 0.100
3/8 0.562 0.551 0.614 0.295 0.270 0.780 0.720 0.063 0.037 0.094 0.081 0.168 0.131
1/2 0.750 0.735 0.820 0.400 0.367 1.040 0.960 0.085 0.050 — — — —

Hex Head Machine Screw Specifications

  • Standard (ASME/ANSI)
  • Metric (IFI)
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Hex Head Machine Screws Available Materials

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Industries We Serve

Nickel Systems provides high quality exotic grade materials that hold up in the toughest, most severe heat and corrosive environments. With our large inventory of specialty fasteners in stock, we are always ready to answer the call to serve the most challenging applications.

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