Direct Fastening Technical Guide , Edition 22
3.2.15.3.3 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 3.6 ( 5 )
Steel thickness t II in . Aluminum thickness t II in .
3 / 16 ≤ t II
< 1 / 4 Torque 5.9 ( 8 ) t II
≥1 / 4 Torque 5.9 ( 8 )
0.2 ≤ t II
< 1 / 4 Torque 3.6 ( 5 ) t II
≥1 / 4 Torque 3.6 ( 5 )
S-BT-GR M8 / 7 SN 6 S-BT-MR W10 / 15 SN6 S-BT-GF M8 / 7 AN 6 S-BT-MF W10 / 15 AN 6 |
|
|
|
|
|
tll |
|
|
|
|
tll |
|
|
|
tll |
tll |
tll |
|
Drill through hole * |
Drill through hole * |
Pilot hole * |
Drill through 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 [ 0.236 "] |
≥ 6 [ 0.236 "]
Spacing ≥ 15 : ≥ 15 mm
[ 0.591 "]
[ 0.591 "] ≥ 6 [ 0.24 "]
≥ 15 [ 0.59 "]
≥ 15 [ 0.59 "]
|
Edge distance : ≥ 6 mm
≥ 6 [ 0.24 "]
|
Base material corrosion protection layer |
≥ 5 mm [ 3 / 16 "] |
|
|
Remark : thickness of base material corrosion protection layer ≤ 0.8 mm [ 0.032 "]. For thicker coatings , please contact Hilti . |
Application requirements Thickness of fastened materials
Checking stand-off from the base material tI tNUT
Lg
hNVS
S-BT-MF W10 / 15 AN6 1.6 mm [ 0.063 ''] ≤ t l ≤15.0 mm [ 0.59 '']
S-BT-MF W10 / 15 AN6 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 / 15 SN6 |
S-BT-GR M8 / 7 SN6 |
S-BT-MF W10 / 15 AN6 |
S-BT-GF M8 / 7 AN6 |
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
89