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Eight Tool TD-4 – 4mm Hexagon Screwdriver

Eight Tool TD-4 – 4mm Hexagon Screwdriver

$11.50 AUD +GST

In stock

Excellent series 4mm hexagon screwdriver.

  • Taper head on long end of driver for effective pre-fastening and final tightening
  • Long shaft and compact handle for workability in deep or narrow places
  • High quality acetate plastic handle is resistant to both oil and chemicals, is extremely durable, and prevents slippage and damage from impact while being easy on the hands.

Sku: TD-4

Material: SNCM+V Alloy steel

Hard-chrome plated finish.

HRC: 53-60

Made in Japan.

In stock

SKU: eight-tool-TD-4Categories: , Tags: , , , , , , ,

Description

Excellent series 4mm hexagon screwdriver.

  • Taper head on long end of driver for effective pre-fastening and final tightening
  • Long shaft and compact handle for workability in deep or narrow places
  • High quality acetate plastic handle is resistant to both oil and chemicals, is extremely durable, and prevents slippage and damage from impact while being easy on the hands.

Sku: TD-4

Material: SNCM+V Alloy steel

Hard-chrome plated finish.

HRC: 53-60

Made in Japan.

Dimensions (Metric Size)
Item No. H L1 L2 φ
TD-4 4 125 102 26

Additional information

Weight 0.06 kg

Taper Head

-further improved in durability and abrasion resistance. Suitable for use even when performing final tightening
-torsional strength is greater by 10-20% compared to ball point hexagon wrenches
-especially effective when tilted at a 0-20 degrees angle

Taper Head Features
  • It is more durable and wears less as the hexagon taper head fits precisely into the bolt hole and turn the bolt as you can see in the picture.
  • The taper head finish is precise, accurate, and consistent with Eight Tool’s unique manufacturing process.
  • The contact area between a bolt and it’s socket is larger compared to a previous product, so the wrench fits precisely and does not slip when used straight or at a tilted angle.
  • In addition to the features above, special alloy steel and hardness contribute to abrasion resistance when applying high torque.

Screw Compatibility Table (Hexagon)

Metric Size
Nominal Size
Cap Bolt
Set Screw
Flat Head Screw
Button Head Bolt
Taper Plug Screw
0.71 M1.14
M1.16
M1.18
0.89 M2
1.27 M1.4 M2.5
1.5 M1.6
M2
M3
2 M2.5 M4 M3 M3
2.5 M3 M5 M4 M4
3 M4 M6 W1/4″ M5 M5
4 M5 M8 W5/16″ M6 M6
5 M6 W1/4″ M10 W3/8″ M8 M8 1/8″
6 M8 W5/16″
M12
M14
W1/2″
M10 M10 1/4″
8
M10 W3/8″
W7/16″
M16 W5/8″ M12 M12 3/8″
10 M12 W1/2″
M18
M20
W3/4″
M14
M16
M14
M16
1/2″
12 M14 M22
M24
M18
M20
M18
M20
14 M16 W5/8″
M18 W3/4″
M22
M24
M22
M24
3/4″
17 M20 W5/8″
M22 W1″
1″
19
M24
M27
W1 1/8″
21 W1 1/4″
W1 3/8″
22 M30 1 1/2″
24 M33
26 W1 1/2″
W1 3/4″
27 M36
M39
32
M42
M45
W2″
36 M48
M52

The prefix W stands for screw of Whitworth size and M for Metric size.

The figures after these prefixes show the diameter of given screw or bolt.

Inch Size
Nominal Size
Cap Bolt
Set Screw
Flat Head Screw
Button Head Bolt
Taper Plug Screw
0.028″ #0 (1.52)
0.035″ #1 (1.85)
#2 (2.18)
#0 (1.52) #0 (1.52)
0.05″ #0 (1.52) #3 (2.51)
#4 (2.84)
#1 (1.85)
#2 (2.18)
#1 (1.85)
#2 (2.18)
1/16″ #1 (1.85) #5 (3.17)
#6 (3.50)
#3 (2.51)
#4 (2.84)
#3 (2.51)
#4 (2.84)
5/64″ #2 (2.18)
#3 (2.51
#8 (4.16) #5 (3.17)
#6 (3.50)
#5 (3.17)
#6 (3.50)
3/32″ #4 (2.64)
#5 (3.17)
#10 (4.82) #8 (4.16) #8 (4.16)
7/64″ #6 (3.50)
1/8″ 1/4″ #10 (4.82) #10 (4.82)
9/64″ #8 (4.16)
5/32″ #10 (4.82) 5/16″ 1/4″ 1/4″ 1/8″
3/16″ 1/4″ 3/8″ 5/16″ 5/16″ 1/8″
7/32″ 7/16″ 3/8″ 3/8″
1/4″ 5/6″ 1/2″ 7/16″ 1/4″
5/16″ 3/8″ 5/8″ 1/2″ 1/2″ 3/8″
3/8″ 7/16″ 1/2″ 3/4″ 5/8″ 5/8″ 1/2″
7/16″ 9/16″
1/2″ 5/8″ 7/8″ 3/4″
9/16″ 1″ 1 1/8″ 3/4″
5/8″ 3/4″ 1 1/4″ 1 3/8″ 1″
3/4″ 7/8″ 1″ 1/2″ 1 1/4″
7/8″ 1 1/8″ 1 1/4″
1″ 1 3/8″ 1 1/2″ 1 3/4″ 2″ 1/2″ 2″

The figures in parentheses show metric size and the fractions show size in inches.

The inch size screws are Unify screw in ISO standards. Unify screw is specified as the screw with 60 degree thread both in UNF and UNC specification.

Conversion Table of Inch and Metric Size
  • 1/8″ = 3.18mm
  • 7/16″ = 11.11mm
  • 3/4″ = 19.05mm
  • 1/4″ = 6.35mm
  • 1/2″ = 12.70mm
  • 7/8″ = 22.23mm
  • 5/16″ = 7.94mm
  • 9/16″ = 14.29mm
  • 1″ = 25.4mm
  • 3/8″ = 9.53mm
  • 5/8″ = 15.88mm

About Torque

What is torque?

  • Torque is the measure of a force’s tendency to produce rotation or torsion.
  • The measure of Torque is now used for screw fastening using a tools like hexagon wrenches.
    • Torque is defined as “Force” × “Lever-arm distance”.

For instance, when holding and applying force to a hexagon wrench inserted in a hexagon socket head bolt at 0.2m away from the center of the bolt with force of 10N, the tightening force is; from the Formula : FXL=T (F: Force N, L: Lever-arm distance m, T: Torque N・m) 10N × 0.2m = 2.0 N・m It is also deduced from the Formula that F (force applied) necessary to obtain the tightening torque of 2.0 N・m with L:0.4m is 5N.

  • ISO and JIS stipulate a guaranteed torque value for each size of hexagon wrenches within which they will not be broken, twisted, distorted in a hexagon shape or bent to the extent that they will become unusable. They also demonstrate the test method with a torque wrench.
  • ISO and JIS specify that hexagonal wrenches shall not be broken or cause any irregularities such as twisting, deformation in the hexagon shape, or bending when used within proof torque values (ISO 2934,JIS B 41648).

-JIS specification shows proof torque values for each size as well as the test method using a torque wrench.

Maximum torque that human hands can produce

(test value of hexagon wrenches)

Type L-Type Standard Size L-Type Extra Long
Flat hexagon(mm) (N・m) L 2 (mm) (N・m) L 2 (mm)
1.5 *1.32 52 *1.32 80
2 *3.24 58 *3.24 95
2.5 5.88 60 *6.37 110
3 6.37 65 8.83 126
4 10.8 72 16.8 142
5 12.8 80 26.5 160
6 24.5 90 58.8 180
8 39.2 100 78.5 200
10 44.1 112 88.3 224

*The figures with (*) mark = The maximum torque human hands can produce exceeds the maximum value of hexagon wrench.

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