Figure 3-70. Thickness Gauge
Figure 3-71. Using a Thickness Gauge
3-18. Sheet Metal and Wire Gauge. The sheet
metal and wire gauge, shown in figure 3-72, is used for
measuring the diameters of wires or the thickness of
Types. The type of sheet metal and wire
to be used depends on the type of material being
measured, as follows:
Iron wire, hot-and cold-
rolled sheet steel
Non-ferrous sheet metal
Sheet and plate iron
Steel wire gauge
Use. As previously stated, sheet metal and
wire gauges can measure both sheet metal thickness
and wire diameter (see figure 3-72).
thickness of a piece of metal, proceed as follows:
Remove any burrs from the
location where the gauge will be applied.
Do not force the metal into the slot.
Damage to the metal can result.
Find the slot that refuses to
pass the metal without forcing.
Try the next larger slots until
one is found that passes the metal. This is the correct
The decimal equivalent of the gauge
number is shown on the opposite side of
Wire. To measure wire diameter,
proceed as follows:
Do not force the wire into the slot. The
Figure 3-72. Measuring Sheet Metal and Wire