Ultimate shear strengths - bearing ( shear ), lb ( kN ) 1 , 2 , 4 , 5 , 6
Screw designation
S-MS 8-18x1 / 2 HWH
S-MS 10-12x3 / 4 HWH
# 8 HWH Sharp
# 10 HWH Sharp
S-MD 8-18 HWH 3 , 7
S-MD 10-16 HWH 3 , 7
S-MD 12-14 HWH 3 , 7
Thickness of member in contact with screw head ga ( In .)
Thickness of member not in contact with the screw head , ga ( in .)
28 26 24 22 20 18 16 ( 0.015 ) ( 0.018 ) ( 0.024 ) ( 0.030 ) ( 0.036 ) ( 0.048 ) ( 0.060 )
28 ( 0.015 ) 220 ( 0.98 ) 260 ( 1.16 ) 315 ( 1.40 ) 320 ( 1.42 ) 320 ( 1.42 ) – – 26 ( 0.018 ) 240 ( 1.07 ) 270 ( 1.20 ) 340 ( 1.51 ) 340 ( 1.51 ) 340 ( 1.51 ) – – 24 ( 0.024 ) 245 ( 1.09 ) 270 ( 1.20 ) 445 ( 1.98 ) 475 ( 2.11 ) 475 ( 2.11 ) – – 22 ( 0.030 ) 245 ( 1.09 ) 345 ( 1.53 ) 445 ( 1.98 ) 555 ( 2.47 ) 555 ( 2.47 ) – – 20 ( 0.036 ) 320 ( 1.42 ) 345 ( 1.53 ) 555 ( 2.47 ) 710 ( 3.16 ) 860 ( 3.83 ) – – 26 ( 0.018 ) – 230 ( 1.02 ) 375 ( 1.67 ) 455 ( 2.02 ) 520 ( 2.31 ) 520 ( 2.31 ) – 24 ( 0.024 ) – 230 ( 1.02 ) 410 ( 1.82 ) 570 ( 2.54 ) 660 ( 2.94 ) 760 ( 3.38 ) – 22 ( 0.030 ) – 330 ( 1.47 ) 500 ( 2.22 ) 685 ( 3.05 ) 765 ( 3.40 ) 925 ( 4.11 ) – 20 ( 0.036 ) – 365 ( 1.62 ) 500 ( 2.22 ) 685 ( 3.05 ) 895 ( 3.98 ) 1120 ( 4.98 ) – 18 ( 0.048 ) – 365 ( 1.62 ) 570 ( 2.54 ) 725 ( 3.22 ) 895 ( 3.98 ) 1330 ( 5.92 ) – 28 ( 0.015 ) 115 ( 0.51 ) 115 ( 0.51 ) 115 ( 0.51 ) 115 ( 0.51 ) – – – 26 ( 0.018 ) 115 ( 0.51 ) 275 ( 1.22 ) 275 ( 1.22 ) 275 ( 1.22 ) – – – 24 ( 0.024 ) 115 ( 0.51 ) 275 ( 1.22 ) 425 ( 1.89 ) 425 ( 1.89 ) – – – 22 ( 0.030 ) 115 ( 0.51 ) 275 ( 1.22 ) 425 ( 1.89 ) 610 ( 2.71 ) – – – 28 ( 0.015 ) 115 ( 0.51 ) 115 ( 0.51 ) 115 ( 0.51 ) 115 ( 0.51 ) 115 ( 0.51 ) – – 26 ( 0.018 ) 115 ( 0.51 ) 275 ( 1.22 ) 275 ( 1.22 ) 275 ( 1.22 ) 275 ( 1.22 ) – – 24 ( 0.024 ) 115 ( 0.51 ) 275 ( 1.22 ) 440 ( 1.96 ) 440 ( 1.96 ) 440 ( 1.96 ) – – 22 ( 0.030 ) 115 ( 0.51 ) 275 ( 1.22 ) 440 ( 1.96 ) 715 ( 3.18 ) 715 ( 3.18 ) – – 20 ( 0.036 ) 115 ( 0.51 ) 275 ( 1.22 ) 440 ( 1.96 ) 715 ( 3.18 ) 895 ( 3.98 ) – – 22 ( 0.030 ) – – – 400 ( 1.78 ) 525 ( 2.34 ) 600 ( 2.67 ) 600 ( 2.67 ) 20 ( 0.036 ) – – – 400 ( 1.78 ) 525 ( 2.34 ) 715 ( 3.18 ) 715 ( 3.18 ) 18 ( 0.048 ) – – – 400 ( 1.78 ) 525 ( 2.34 ) 805 ( 3.58 ) 955 ( 4.25 ) 16 ( 0.060 ) – – – 400 ( 1.78 ) 525 ( 2.34 ) 805 ( 3.58 ) 1120 ( 4.98 ) 22 ( 0.030 ) – – – – 565 ( 2.51 ) 695 ( 3.09 ) 695 ( 3.09 ) 20 ( 0.036 ) – – – – 565 ( 2.51 ) 830 ( 3.69 ) 830 ( 3.69 ) 18 ( 0.048 ) – – – – 565 ( 2.51 ) 865 ( 3.85 ) 1110 ( 4.94 ) ≥ 16 ( 0.060 ) – – – – 565 ( 2.51 ) 865 ( 3.85 ) 1210 ( 5.38 ) 22 ( 0.030 ) – – – – 600 ( 2.67 ) 785 ( 3.49 ) 785 ( 3.49 ) 20 ( 0.036 ) – – – – 600 ( 2.67 ) 930 ( 4.14 ) 945 ( 4.20 ) 18 ( 0.048 ) – – – – 600 ( 2.67 ) 925 ( 4.11 ) 1260 ( 5.60 ) ≥ 16 ( 0.060 ) – – – – 600 ( 2.67 ) 925 ( 4.11 ) 1290 ( 5.74 )
1 The lower of the ultimate shear bearing and shear fastener strength of screw should be used for determination of allowable or factored resistance loads per footnote 4 .
2 Unless otherwise noted , load values based upon testing completed in accordance with AISI S905 . 3 Load values based upon calculations done in accordance with Section J4 of AISI S100 . ANSI / ASME standard screw diameters were used in the calculations . 4 AISI S100 recommends a safety factor of 3.0 be applied for allowable strength design ( ASD ), a Φ factor of 0.5 be applied for LRFD design or a Φ factor of 0.4 be applied for LSD design . 5 The load data in the table is based upon sheet steel with F u
= 45 ksi . For F u = 55 ksi steel , multiply values by 1.22 . For F u
≥ 65 ksi steel , multiply values by 1.44 .
6 Refer to Section 3.6.3.5 to ensure optimal drilling capacities . 7 Load data for thicker steel connections available . Please reference Section 3.6.2 .
3.6.3.4 INSTALLATION INSTRUCTIONS
For general discussion of Hilti screw fastener installation , reference Section 3.6.1.7 .
Warning : Because of the potential for delayed hydrogen assisted stress corrosion cracking , many hardened steel fasteners are not recommended for use with dissimilar metals or chemically treated wood when moisture may be present or in corrosive environments . For further information , contact Hilti Technical Support at 1-877-749-6337 .
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