Direct Fastening Technical Guide , Edition 24
3.2.15.3.2 Additional technical information Maximum tightening torque on serrated flange nut , ft-lb ( Nm ) and type of bore hole
Fastener 1 / 8 ≤ t II
< 3 / 16 Torque 5.9 ( 8 )
Steel thickness t II in . Aluminum thickness t II in .
3 / 16 ≤ t II
< 1 / 4 Torque 11.8 ( 16 ) t II
≥1 / 4 Torque 11.8 ( 16 ) t II
≥1 / 4 Torque 5.9 ( 8 )
S-BT-GR M8 / 7 SN 6 HL S-BT-MR W10 or M10 / 15 SN6 HL S-BT-GF M8 / 7 AN 6 HL S-BT-MF W10 or M10 / 15 AN 6 HL |
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tll |
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tll |
tll |
tll |
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Drill through hole * |
Drill through hole * |
Pilot hole * |
Pilot hole * |
* In case of a drill through hole , or a pilot hole in steel with thickness of 1 / 4 inch , rework of the coating on the back side of the plate / profile may be needed .
Spacing and edge distances
≥ 6 [ 0.24 "] |
≥ 6 [ 0.24 "]
≥ 18 [ 0.71 "]
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≥ 18 [ 0.71 "] |
Base material corrosion protection layer |
≥ 5 mm [ 3 / 16 "]
Application requirements Thickness of fastened materials
Checking stand-off from the base material tI tNUT
Lg
hNVS
Remark : thickness of base material corrosion protection layer ≤ 0.8 mm [ 0.032 "]. For thicker coatings , please contact Hilti .
S-BT-MF W10 or M10 / 15 AN6 HL : 1.6 mm [ 0.063 "] ≤ t l ≤15.0 mm [ 0.59 "] S-BT-MF W10 or M10 / 15 AN6 HL : h NVS
= 29.3 mm to 29.8 mm [ 1.15 " to 1.17 "]
Applications
Multipurpose fastening |
Grating with X-FCM * |
S-BT-MR W10 or M10 / 15 SN6 HL |
S-BT-GR M8 / 7 SN6 HL |
S-BT-MF W10 or M10 / 15 AN6 HL |
S-BT-GF M8 / 7 AN6 HL |
Junction box , etc . Channel installation Signage Grating fastening
* Load data , application requirements , corrosion information , fastener selection , system recommendation , material specification and coating refer to section X-FCM Grating Fastening
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