H6HL Fastener and Torque Specifications

This article provides the fastener and torque specifications for various assemblies of the aircraft, including lower assemblies, frame assemblies, propulsion, battery rack/tray, and avionics.

Table 1: Lower Assemblies

Component Name	Location	Fastener Type	Torque Spec	Loctite	Quantity
Toe Through-Bolt	Lower Leg (Each)	M3x45 Button Torx Screw, M3 Locknut, x2 M3 Washers	0.6 N-m (0.4425 ft-lb)	N/A	x4 per Aircraft
Landing Gear Through-Bolt (Folding)	Upper Leg (Each)	M3x40 Button Torx Screw, M3 Locknut, x2 M3 Washers	2.6 N-m (1.9177 ft-lb)	N/A	x4 per Aircraft
Landing Gear Clamp Bolt	Upper Leg (Each)	M4x10 Socket Screw	2.6 N-m (1.9177 ft-lb)	243 Blue	x2 Each (x8/AC)
Landing Gear Mounting (Folding)	Below Frame Arm (5,3,6,4)	M5x16 Socket Screw	3.0 N-m (2.2127 ft-lb)	243 Blue	x4 Each (x16/AC)
Dampening Gremsy H16 Quick Release Plate	Anti-Vibration Screw Kit	—	0.3 N-m (0.2213 ft-lb)	243 Blue	x8 per Aircraft
Gremsy Clamp Mounting	Dampening Plate	M3x10 Socket Screw	1.2 N-m (0.8851 ft-lb)	243 Blue	x2 Each (x8/AC)
Gremsy Clamp Clamping	Dampening Plate	M3x8 Socket Screw	1.2 N-m (0.8851 ft-lb)	243 Blue	x1 Each (x4/AC)
Payload Clamp Through-Bolt	Bottom of Payload Clamp	M3x22 Socket Screw	2.6 N-m (1.9177 ft-lb)	243 Blue	x1 Each (x4/AC)
Payload Clamp Mounting	Exterior of Flight Control Box	M4x8 Socket Screw	2.6 N-m (1.9177 ft-lb)	243 Blue	x4 Each (x16/AC)
Aux Power XT60 (Black)	Exterior of Flight Control Box	M3x14 Button Torx Screw, M3 Locknut	1.2 N-m (0.8851 ft-lb)	N/A	x2 Each (x10/AC)
Aux Power XT60 (Yellow)	Exterior of Flight Control Box	M3x6 Button Torx Screw, M3x6 Socket Screw	1.2 N-m (0.8851 ft-lb)	243 Blue	x2 Each

Table 2: Frame Assemblies

Component Name	Location	Fastener Type	Torque Spec	Loctite	Quantity
Exterior Wall Mounting (Top/Bottom)	Outer Perimeter	M3x10 Button Torx, M3 Locknut, M3x12 Flat Torx	1.2 N-m / 0.6 N-m	N/A	x12 Each (172/AC)
SLS Boom Bumpers	Top Frame Plate	M3x12 Flat Torx Screw	0.6 N-m (0.4425 ft-lb)	N/A	x2 Each (x12/AC)
Hinge Mounting (Top/Bottom)	Outer Perimeter	M4x14 Button Torx Screw	2.6 N-m (1.9177 ft-lb)	243 Blue	x8 Each (x32/AC)
X Support (Top/Bottom)	Between Frame	M3x12 Button Torx Screw	1.2 N-m (0.8851 ft-lb)	243 Blue	3 Each (x4/AC)
Interior Wall Mounting (Top/Bottom)	Inner Perimeter	M3x10 Button Torx Screw, M3 Locknut	1.2 N-m (0.8851 ft-lb)	N/A	x32 per Aircraft
50mm Standoff (Top/Bottom)	Inner Perimeter	M3x12 Button Torx Screw	1.2 N-m (0.8851 ft-lb)	243 Blue	x2 Each (38/AC)
SLS Hinge Bumpers (Top/Bottom)	Outer Perimeter	M3x10 Button Torx Screw, M3 Locknut	0.6 N-m (0.4425 ft-lb)	N/A	x2 Each (x12/AC)
PDB Mounting	Below Frame Arm (1 & 2)	M3x10 Button Torx Screw	0.6 N-m (0.4425 ft-lb)	243 Blue	x2 Each (34/AC)
Flight Control Box Mounting	Inner Perimeter	M4s Button Torx Screw	2.6 N-m (1.9177 ft-lb)	243 Blue	x14 per Aircraft
Rack Alignment Wall	Inner Perimeter	M3x12 Flat Torx, M3 Square Nut	0.6 N-m (0.4425 ft-lb)	243 Blue	16 Each (x12/AC)
Plunger Base	Top Frame Plate	M3x12 Flat Torx, M3 Square Nut	0.6 N-m (0.4425 ft-lb)	243 Blue	x2 Each (s&/AC)
Plunger Handle	Top Frame Plate	M3x12 Flat Torx Screw	0.6 N-m (0.4425 ft-lb)	243 Blue	x1 Each (x2/AC)
AS150U Top Mounting	Top Frame Plate	M3x8 Button Torx Screw	1.2 N-m (0.8851 ft-lb)	243 Blue	x2 Each (34/AC)
AS150U Side Mounting	Exterior Walls	M3x8 Button Torx, 10mm Standoff, M3x16 Button Torx	0.6 N-m (0.4425 ft-lb)	243 Blue	x2 Each (34/AC)
GPS Stand	Top Frame Plate	M3x8 Flat Torx, M3 Square Nut	1.2 N-m (0.8851 ft-lb)	243 Blue	x4 per Aircraft
GPS Extension	Top Frame Plate	M3x14 Socket Screw, M3 Locknut	1.0 N-m (0.7376 ft-lb)	243 Blue	x4 Each (x2/AC)
GPS Puck Mount	GPS Stand	Specific Screw, M3 Locknut	0.6 N-m (0.4425 ft-lb)	N/A	x2 Each (x4/AC)

Table 3: Propulsion

Component Name	Location	Fastener Type	Torque Spec	Loctite	Quantity
Hinge to Boom Clamp	Bottom of each Hinge	M4x12 Socket Screw	3.0 N-m (2.2127 ft-lb)	243 Blue	x2 Each (x12/AC)
Hinge Through-Bolt	Side of each Hinge	M3x45 Button Torx, M3 Locknut, x2 M3 Washers	1.2 N-m (0.8851 ft-lb)	N/A	x6 per Aircraft
Hinge Set Screw	Top of each Hinge	M3x0.5 Alloy Steel Flat Tip	0.3 N-m (0.2213 ft-lb)	262 Red	x12 per Aircraft
ESC Mounting	Bottom Frame Plate	M3x10 Button Torx, M3 Locknut, M3 Washer	1.2 N-m (0.8851 ft-lb)	N/A	x2 Each (x12/AC)
Boom Cover (LED/Ant/Combo)	Boom End	M3x8 Button Torx, M3 Square Nut	0.6 N-m (0.4425 ft-lb)	243 Blue	x2 Each (x12/AC)
Motor Mount to Boom	Boom End	M5x12 Button Torx Screw	3.0 N-m (2.2127 ft-lb)	262 Red	x4 Each (x24/AC)
Motor Mount to Motor	Boom End	M5x12 Button Torx Screw	3.0 N-m (2.2127 ft-lb)	262 Red	x4 Each (x24/AC)
Motor Mount Lower Bracket	Boom End	M4x16 Socket Screw	2.6 N-m (1.9177 ft-lb)	262 Red	x4/motor (x24/AC)
Propeller Hub	Motor	T-Motor Specific Screw	4.5 N-m (3.319 ft-lb)	262 Red	x4 Each (x24/AC)
Propeller to Motor	Boom End	T-Motor Specific Screw	4.5 N-m (3.319 ft-lb)	262 Red	x4 Each (x24/AC)

Table 4: Battery Rack / Tray Assembly

Component Name	Location	Fastener Type	Torque Spec	Loctite	Quantity
Battery Dovetail Handles	Battery Rack	M3x8/M3x10 Flat Torx	0.6 N-m (0.4425 ft-lb)	N/A	x4 Each (x16/AC)
SLS Battery Lead Retainers	Battery Rack	M3x8 Flat Torx Screw	0.6 N-m (0.4425 ft-lb)	N/A	x4 per Aircraft
SLS Rack Corner	Battery Rack	M3x5 Flat Torx Screw	0.6 N-m (0.4425 ft-lb)	N/A	x4 per Aircraft
Battery Tray Clamp Mount	Bottom Frame Plate	M3x12 Flat Torx Screw	1.2 N-m (0.8851 ft-lb)	243 Blue	x24 per Aircraft
Battery Tray Clamp	Bottom Frame Plate	M4x25 Socket	N/A	243 Blue	x8 per Aircraft
Battery Tray Picatinny Rail	Battery Tray	M3x6 Flat Torx Screw	1.2 N-m (0.8851 ft-lb)	243 Blue	x24 per Aircraft
Battery/Fuel Plate	Avionics	M3x8 Socket Screw	0.3 N-m (0.2213 ft-lb)	N/A	x4 per Aircraft

Table 5: Avionics

Component Name	Location	Fastener Type	Torque Spec	Loctite	Quantity
Remote ID & Housing	Frame Arms (4/6)	M2x10 Button Torx, M2 Brass Insert	N/A	243 Blue	x4 per Aircraft
C-ATLAS Air Unit	Frame Arms (4/6)	M3x10 Button Torx, M3x12 Flat Torx	0.6 N-m (0.4425 ft-lb)	N/A	x4 per Aircraft
InVID FPV Camera	Frame Arms (5/3)	M2x4 Flat Torx, M3x8 Flat Torx	0.6 N-m (0.4425 ft-lb)	N/A	x4/x8 per AC
Herelink/CamPark FPV	Frame Arms (5/3)	M2x6/M3x10 Button Torx, M3 Locknut/Square	0.6 N-m (0.4425 ft-lb)	N/A	x4 per Aircraft
RF Design RFD900x2	Avionics	M3x16 Socket Screw	0.3 N-m (0.2213 ft-lb)	N/A	x2 per Aircraft
Mauch DC Power Regulator	Avionics	M3x22 Socket Screw	0.3 N-m (0.2213 ft-lb)	N/A	x4 per Aircraft
Mauch 24V BEC	Avionics	M3x8 Socket Screw	0.3 N-m (0.2213 ft-lb)	N/A	x2 per Aircraft
Pixhawk Mount	Avionics	M3x10 Socket Screw	0.3 N-m (0.2213 ft-lb)	N/A	x8 per Aircraft
Buzzer	Avionics	M3x8 Socket Screw	0.3 N-m (0.2213 ft-lb)	N/A	x2 per Aircraft
Telemetry/USB Mount	Avionics	M3x22 Flat Torx, M3 Brass Insert	0.6 N-m (0.4425 ft-lb)	243 Blue	x2 Each (x4/AC)
Mavlink Mount	Avionics	M3x10 Flat Torx, M3 Locknut	0.6 N-m (0.4425 ft-lb)	N/A	x2 per Aircraft