Hilti Screw Selection Information and Nomenclature

Hilti offers a wide variety of screw fasteners, hex, phillips pan head, flat head, wafer head, bulge head, truss head and many others

Thread selection

Conversion Tables Metal Gauge

  Aluminum Sheet Metal
Number of Gauge (Thickness in decimal parts of an inch)
10 0.1019 0.1345
11 0.0907 0.1196
12 0.0808 0.1046
13 0.0720 0.0897
14 0.0641 0.0747
15 0.0571 0.0673
16 0.0508 0.0598
17 0.0493 0.0538
18 0.0403 0.0478
19 0.0359 0.0418
20 0.0320 0.0359
21 0.0285 0.0329
22 0.0253 0.0299
23 0.0226 0.0269
24 0.0201 0.0239
25 0.0179 0.0209
26 0.0159 0.0179
27 0.0142 0.0164
28 0.0126 0.0149

 

Decimal Equivalents for Fractions of an Inch

Fraction Decimal Equivalent
1/64 0.015
1/32 0.031
3/64 0.046
1/16 0.062
5/64 0.078
3/32 0.093
7/64 0.109
1/8 0.125
9/64 0.140
5/32 0.156
11/64 0.171
3/16 0.187
13/64 0.203
7/32 0.218
15/64 0.234
1/4 0.250

 

Screw Diameter Equivalents

Screw Diameter Decimal Equivalent
#6 0.138
#8 0.164
#10 0.190
#12 0.216
#14 0.242
1/4" 0.250

 

Recommended Installation RPM

Diameter RPM
#8 2500
#10 2500
#12 1800
#14 1800
5/6" 1200

 

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