Hx8 – Torque Specifications

Hx8 Fastener and Torque Specifications

This article provides detailed fastener and torque specifications for various aircraft assemblies, including lower assemblies, tether systems, propulsion, battery, and avionics components.

Table 1: Lower Assemblies

Component Name	Location	Fastener Type	Torque Specification	Loctite Type	Quantity
Toe Through-Bolt	Lower Leg (Each)	M3x35 Button Torx Screw, M3 Locknut, x2 M3 Washers	0.6 N-m (0.4425 ft-lb)	N/A	x4 per Aircraft, x4 per Aircraft, x8 per Aircraft
Landing Gear Through-Bolt (Fixed)	Upper Leg (Each)	M3x35 Button Torx Screw, M3 Locknut, x2 M3 Washers	0.6 N-m (0.4425 ft-lb)	N/A	x4 per Aircraft, x4 per Aircraft, x8 per Aircraft
Landing Gear Through-Bolt (Folding)	Upper Leg (Each)	M3x35 Socket Screw, M3 Locknut, x2 M3 Washers	0.6 N-m (0.4425 ft-lb)	N/A	x4 per Aircraft, x4 per Aircraft, x8 per Aircraft
Landing Gear Clamp Bolt	Upper Leg (Each)	M3x8 Socket Screw	1.2 N-m (0.8851 ft-lb)	243 Blue	x2 Each, x8 per Aircraft
Landing Gear Mounting (Fixed)	Below Frame Arms	M4x14 Socket Screw	2.6 N-m (1.9177 ft-lb)	243 Blue	x4 Each, x16 per Aircraft
Landing Gear Mounting (Folding)	Below Frame Arms	M4x16 Socket Screw	2.6 N-m (1.9177 ft-lb)	243 Blue	x4 Each, x16 per Aircraft
Gremsy H16 Quick Release	Dampening 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 per Aircraft
Gremsy Clamp Clamping	Dampening Plate	M3x8 Socket Screw	1.2 N-m (0.8851 ft-lb)	243 Blue	x1 Each, x4 per Aircraft
Payload Clamp Through-Bolt	Bottom of Payload Clamp	M3x22 Socket Screw	1.2 N-m (0.8851 ft-lb)	243 Blue	x1 Each, x4 per Aircraft
Payload Clamp Mounting	Exterior of Flight Control Box	M4x6 Socket Screw	2.6 N-m (1.9177 ft-lb)	243 Blue	x4 Each, x16 per Aircraft

Table 2: Tether Assemblies

Component Name	Location	Fastener Type	Torque Specification	Loctite Type	Quantity
Auxiliary Power XT60 Connectors (Black)	Exterior of Flight Control Box	M3x14 Button Torx Screw, 6mm Spacer, M3 Locknut	1.2 N-m (0.8851 ft-lb)	N/A	x2 Each, x10 per Aircraft
Auxiliary Power XT60 Connectors (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
Lower Tether XT90 Harness	Below Rear Frame Arms	M3x12 Button Torx Screw, 6mm Spacer	1.2 N-m (0.8851 ft-lb)	243 Blue	x2 Each, x8 per Aircraft
Upper Tether XT90 Harness	Above Rear Frame Arms	M3x18 Button Torx Screw, 12mm Spacer	N/A	243 Blue	x2 Each, x8 per Aircraft

Table 4: Propulsion

Component Name	Location	Fastener Type	Torque Specification	Loctite Type	Quantity
Hinge to Boom Clamp	Bottom of Hinge	M3x12 Socket Screw	1.8 N-m (1.3276 ft-lb)	243 Blue	x2 Each, x8 per Aircraft
Hinge Through-Bolt	Side of Hinge	M3x40 Button Torx Screw, M3 Locknut, x2 M3 Washers	0.6 N-m (0.4425 ft-lb)	N/A	x4 per Aircraft (x3)
Hinge Set Screw	Top of Hinge	M3x0.5 Alloy Steel Flat-Tip Screws	0.3 N-m (0.2213 ft-lb)	262 Red	x2 Each, x8 per Aircraft
ESC Mounting	SLS Exterior Wall	M2x4 Button Torx Screw	0.3 N-m (0.2213 ft-lb)	243 Blue	x4 Each, x32 per Aircraft
Boom Cover (LED, Antenna, Combo)	Boom End	M3x6 Button Torx Screw, M3 Square Nut	0.6 N-m (0.4425 ft-lb)	243 Blue	x2 Each, x8 per Aircraft
Motor Mount to Boom/Motor	Boom End	M4x10 Button Torx Screw	2.6 N-m (1.9177 ft-lb)	262 Red	x4 Each, x32 per Aircraft
Propeller to Motor	Boom End	T-Motor Specific Screw	2.6 N-m (1.9177 ft-lb)	262 Red	x4 Each, x32 per Aircraft

Table 5: 12S Battery Assembly

Component Name	Location	Fastener Type	Torque Specification	Loctite Type	Quantity
Battery Dovetail Handles	12S Battery Pack	M3x16 Flat Torx Screw, M3 Locknut	0.6 N-m (0.4425 ft-lb)	N/A	x8 Each, x16 per Aircraft
Dovetail Handle Mounting	12S Battery Pack	M3x16 Socket Screw, M3x40 Socket Screw, Plastic Spacer	0.6 N-m (0.4425 ft-lb)	N/A	x4 per Aircraft
Battery/Fuel Plate	Avionics	M3x8 Socket Screw	0.3 N-m (0.2213 ft-lb)	N/A	x4 per Aircraft

Table 6: Avionics

Component Name	Location	Fastener Type	Torque Specification	Loctite Type	Quantity
Remote ID & Housing	Between Rear Frame Arms	M2x10 Button Torx Screw, M2 Brass Insert	N/A	243 Blue	x4 per Aircraft
ATLAS C-Air Unit	Above Front Frame Arms	M3x8 Button Torx, M3x12 Flat Torx, M2x4 Flat Torx	0.6 N-m (0.4425 ft-lb)	N/A	x4 per Aircraft
InVID FPV Camera	Below Front Frame Arms	M2x6 Button Torx, M3x8 Flat Torx	0.6 N-m (0.4425 ft-lb)	N/A	x4 per Aircraft
Herelink Air Unit	Between Rear Frame Arms	M3x6 Button Torx, M3 Square Nut	0.6 N-m (0.4425 ft-lb)	N/A	x8 per Aircraft
CamPark FPV Camera	Above Front Frame Arms	M2x6 Button Torx, M6x58 Button Torx	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 Power Cube V4	Avionics	M3x22 Socket Screw	0.3 N-m (0.2213 ft-lb)	N/A	x4 per Aircraft
Mauch 24V BEC Regulator	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 Screw, M3 Brass Insert	0.6 N-m (0.4425 ft-lb)	243 Blue	x2 Each, x4 per Aircraft
Mavlink Mount	Avionics	M3x10 Flat Torx Screw, M3 Locknut	0.6 N-m (0.4425 ft-lb)	N/A	x2 per Aircraft