Torque Specifications

Background of Fasteners

Various types of joints and fasteners are used to assemble components together throughout Freefly products. Depending on the types of materials used, joint design, and fastener used, this document serves as a standard to be referenced where applicable.
Definitions:
    1.
    SHCS: Socket head cap screw
    2.
    BHCS: Button head cap screw
    3.
    FHCS: Flat head cap screw
    4.
    CHCS: Combo head cap screw. Freefly Systems proprietary combination type fastener
Four major types of joints are to be considered, as shown below. These are largely simplified as there are numerous combinations of clamped material vs. threaded material. Materials listed below signify the “clamped” materials and does NOT indicate the threaded material.

Thread-Locking Fluid.

Thread-locking fluid should be used on metal-metal or composite-metal joints that do not require constant adjustment. In general, Loctite type 222 shall be used unless otherwise stated.
    1.
    WARNING: Thread locking fluid (eg Loctite 222) should not be used with plastic joints, or when fastening polycarbonate plastic.

Joint Torque Specifications

Standard Fasteners

    Fastener installation set torque for standard bolts into metallic threads
      Clamped Material (Assumes threaded material is metallic)
All torques are listed as Nm
Aluminium
Aluminium
Plastic
Plastic
Carbon
Carbon
PCBA
PCBA
Steel
Steel
Fastener type/ size
FHCS/ BHCS
SHCS/
CHCS
FHCS/ BHCS
SHCS/
CHCS
FHCS/ BHCS
SHCS/
CHCS
FHCS/ BHCS
SHCS/
CHCS
FHCS/ BHC
SHCS/
CHCS
M1.6
0.2
M1.9
M2
0.3
0.3
0.3
0.2
0.2
M2.5
0.4
0.2
M3
1.1
1.5
.8
.8
1.0
1.0
0.7
0.7
M4
1.5
2.0
M5
3.0
M6
3.0
M7
M8
#0
#1
#2
#3
#4
#5
#6
#8
#10
#12
¼”
⅜”

Plastite Thread Forming Fasteners

    Clamped Material (Assumes threaded material is PA6 nylo, 30% glass filled, 1000rpm installation speed
All torques are listed as Nm
Aluminium
Plastic
Carbon
PCBA
Steel
Fastener type/ size
BHCS Thread Forming/ Plastite
BHCS Thread Forming/ Plastite
BHCS Thread Forming/ Plastite
BHCS Thread Forming/ Plastite
BHCS Thread Forming/ Plastite
M1.6
M1.9
0.25 (.4)
.4
0.1
M2
.25
0.2
M2.5
0.6
M3
1.1
M4
48-2
.35
Last modified 1yr ago