7
2. Descriptions of Different Types of Screws
Shapes of Different Types of Screws
Screw Fastening Torque
M3
M4
Fastening Torque
[cN·m]
50
1. 30
* If the torque is specified in the steps for replacement, follow the specification.
[Notes]
- The photos merely represent examples of the shapes, the actual diameter, length, surface finish
and others vary depending on individual screws.
Notation: [Qty.] - [Form] [Diameter or Nominal Diameter] x [Length] e.g. 4 - M3 x 10, SW4
- If any locked screw becomes unfastened, remove the screw lock and apply the screw lock again
at the time of reassembly. (The Threebond 1401B is recommended.)
- Prior to unfastening any position-adjusted screw, record its original position to ensure that it is at
refastened at the original position in the reassembly process.
Small Pan Head
Screw (M)
Flat Washer
(medium) (W)
Washer-Equipped
Screw (small) (NC)
Wing Bolt (WB)
Hexagonal Nut
(N)
Spring Washer
(SW)
Small Flat Washer
(LW)
(W)
Washer-Equipped Screw
(medium) (NB)
Set Screw (SS)
Inner Hexagonal Hole
Screw (HS)
Truss Head
Screw (TR)
Small Flat Head
Screw (F)
Small Slotted Flat
Head Screw (SF)
Small Countersunk
Head Screw (S)
E-Shaped Ring (E)