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Discontinued Products

Scheduled Maintenance Notice: This site will be unavailable due to scheduled maintenance from 9:00 9/3 to 0:00 (SGT) 10/3/2025. We apologize for the inconvenience.
Notice of End of Sales for Economy Series Pneumatic Equipment Category. More information.

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HEIWA HATSUJYO Washers（Unit of Purchase：Sold Individually (No Min. Purchase)）

10 items

: 30; 45; 60

Days to Ship	All Same day 3 Day(s) or Less 4 Day(s) or Less 5 Day(s) or Less 6 Day(s) or Less 7 Day(s) or Less 8 Day(s) or Less 9 Day(s) or Less 10 Day(s) or Less 11 Day(s) or Less

Disk Spring Lock Washer, JIS B 1251, Class 2 (for Caps, for Heavy Loads)

HEIWA HATSUJYO

Screw has a spring counter-force when compared to the tightening axial force of bolts. The spring prevents thread loosening caused by vibration and shock. It is possible to obtain a stable tightening axial force without causing fatigue to the tightening material as a result of the low pressure applied to the bearing surface.

Standard Price:	SGD 0.14-
Days to Ship:	4 Day(s) or more

JIS Disc Spring Washer Type 1

HEIWA HATSUJYO

[Type (Application)] Spring Washer
[Type] Spring Washer
[Surface Treatment] (Detail) Tempering Color
[Type]Spring Washer, Conical Spring Washer, Load
[Type]No. 1 (for Light Loads), JIS Standard Type 1
[Materials] Stainless Steel
[Surface Treatment] Trivalent Chromate, Chromate, Nickel Plating, Tempering Color
[Nominal Thread (M)] 3 4 5 6 8 10 12 14 16 18 20 22 24 27 30
[Sales Unit] Individual (Available for Purchase as 1pc) Box and Packaging.
[Materials]Steel S50C to S65C
[Materials]Stainless Steel SUS304-CSP
[Outer Diameter D (mm)] 7 9 10 12.5 17 21

Standard Price:	SGD 0.09-
Days to Ship:	4 Day(s) or more

Spring Washer for Cap

HEIWA HATSUJYO

[Materials] Stainless Steel
[Surface Treatment] Anti-Rust Oil Only, Trivalent Chromate, Chromate, Nickel Plating, Tempering Color
[Inner diameter d (mm)] 2.1 2.4 2.7 3.1 4.1 5.1 6.1 6.5 8.2 10.2 11.4 12.2 13 14.2 16.2 18.2 20.2 22.5 24.5
[Nominal Thread (M)] 2 2.3 2.6 3 4 5 6 8 10 12 14 16 18 20 22 24
[Thread (inch)] 1/4 7/16 1/2
[Thickness t (mm)] 0.5 0.6 0.7 1 1.3 1.5

Standard Price:	SGD 0.11
Days to Ship:	4 Day(s) or more

JIS Toothed Lock Washer

HEIWA HATSUJYO

[Applications]
·Internal Teeth Profile: It is used in inconvenient places such as set screws where teeth appear.
·Outside Tooth Profile: It is used in places where more loosening prevention than the internal tooth profile is required.

Standard Price:	SGD 0.03-
Days to Ship:	4 Day(s) or more

Disk Spring Lock Washer for Hex Socket Head Bolt (for Light Loads)

HEIWA HATSUJYO

[Features]
·Heiwa Spring original product
·Disc spring washer specially designed for hexagon socket head cap bolts (cap bolts)
·Due to the large spring action, the axial force of the screw is sufficiently maintained.
·Since the axial force of the bolt is evenly supported around the bearing surface, no bending moment acts on the bolt.
·The method of use is the same as the JIS disk spring washer (2 types), but the CDW has serrations on the front and back, which further enhances the locking effect.
·There are no burrs on the inner and outer circumferences, so the burden of local stress can be reduced.

Standard Price:	SGD 0.16-
Days to Ship:	4 Day(s) or more

JIS Spring Lock Washer

HEIWA HATSUJYO

[Type (application)] Spring Washer
[Type] Spring Washer
[Type]Spring Washer, standard load
[Type]No. 2 (for medium load)
[Materials] Steel, Stainless steel
[Surface treatment] Anti-rust Oil Only, Trivalent Chromate, Chromate, Nickel Plating, Temper Color
[Inner diameter d (mm)] 2.1 2.4 2.7 3.1 4.1 5.1 6.1 6.5 8.2 10.2 11.4 12.2 13 14.2 16.2 18.2 20.2 22.5 24.5
[Nominal Thread (M)] 2 2.3 2.6 3 4 5 6 8 10 12 14 16 18 20 22 24
[Nominal Thread (inch)] 1/4 7/16 1/2
[Thickness t (mm)] 0.5 0.6 0.7 1 1.3 1.5

Days to Ship: 4 Day(s) or more

Days to Ship:	4 Day(s) or more

Disc Spring Lock Washer, JIS B 1251, Class 1 (for Screws, for Heavy Loads)

HEIWA HATSUJYO

This part has spring counter-force comparable to tightening axial force of bolts and prevents thread loosening caused by vibration and shock. It is possible to obtain a stable tightening axial force without causing fatigue to the tightening material due to the low pressure applied to the bearing surface.

Standard Price:	SGD 0.17-
Days to Ship:	4 Day(s) or more

JIS Disc Spring Washer Type 2

HEIWA HATSUJYO

[Type (application)] Spring Washer
[Type] Spring Washer
[Sales unit] Minimum Quantity (Available for Purchase from 1 pc)
[Type] Spring Washer, Conical Spring Washer, Load
[Type]No. 1 (for light load), JIS standard Type 2
[Materials] Steel, Stainless steel
[Surface treatment] None, trivalent chromate, nickel plating, temper color
[Nominal Thread (M)] 4 5 6 8 10 12 14 16 18 20 22 24 27 30
[Thickness t (mm)] 0.45 0.55 0.6 0.9 1.1 1.2 1.4 1.6 1.8 2 2.2 2.5 2.8 3
[Materials]Steel S50C to S65C
[Materials] Stainless steel SUS304
[Surface treatment](Detail) Untreated, Temper color

Standard Price:	SGD 0.11-
Days to Ship:	4 Day(s) or more

Disk Spring Lock Washer for Hex Socket Head Bolt (for Heavy Loads)

HEIWA HATSUJYO

Standard Price:	SGD 0.20-
Days to Ship:	4 Day(s) or more

Flat Spring Washer for Screw

HEIWA HATSUJYO

[Materials] Steel, Stainless steel
[Surface treatment] None, trivalent chromate, nickel plating, temper color
[Inner diameter d (mm)] 4.3 5.3 6.4 8.4 10.5 13 15 17 19 21 23 25 28 31
[Nominal Thread (M)] 4 5 6 8 10 12 14 16 18 20 22 24 27 30
[Thickness t (mm)] 0.45 0.55 0.6 0.9 1.1 1.2 1.4 1.6 1.8 2 2.2 2.5 2.8 3
[Materials]Steel S50C to S65C
[Materials]Stainless steel SUS304
[Surface treatment](Detail) Untreated, Temper color
[Outer diameter D (mm)] 7.5 9 10.5 13.5 16.5 19

Standard Price:	SGD 0.09-
Days to Ship:	4 Day(s) or more


Brand
Product Series
Days to Ship
Environmentally Friendly
Material
Properties / applications
Surface Treatment
Inner Dia. d(mm)
I.D. d(inch)
Nominal of Thread (M)
Outer Diameter D(inch)
Type
Type (Application)
Unit of Purchase
Thickness t (Metric)(mm)
Thickness t (Imperial)(inch)
Type Spring Washers
Material: Stainless Steel
Surface Treatment (Detailed)
Nominal of Thread (inch)
Material Steel
Type Toothed Washer
Cleaning Method


Brand	HEIWA HATSUJYO	HEIWA HATSUJYO	HEIWA HATSUJYO	HEIWA HATSUJYO	HEIWA HATSUJYO	HEIWA HATSUJYO	HEIWA HATSUJYO	HEIWA HATSUJYO	HEIWA HATSUJYO	HEIWA HATSUJYO
Product Series	Disk Spring Lock Washer, JIS B 1251, Class 2 (for Caps, for Heavy Loads)	JIS Disc Spring Washer Type 1	Spring Washer for Cap	JIS Toothed Lock Washer	Disk Spring Lock Washer for Hex Socket Head Bolt (for Light Loads)	JIS Spring Lock Washer	Disc Spring Lock Washer, JIS B 1251, Class 1 (for Screws, for Heavy Loads)	JIS Disc Spring Washer Type 2	Disk Spring Lock Washer for Hex Socket Head Bolt (for Heavy Loads)	Flat Spring Washer for Screw
Days to Ship	4 Day(s) or more	4 Day(s) or more	4 Day(s) or more	4 Day(s) or more	4 Day(s) or more	4 Day(s) or more	4 Day(s) or more	4 Day(s) or more	4 Day(s) or more	4 Day(s) or more
Environmentally Friendly	-	-	-	-	-	-	-	-	-	-
Material	Steel / Stainless Steel	Steel / Stainless Steel	Steel	Steel / Phosphor Bronze	Steel	Steel	Steel	Steel / Stainless Steel	Steel	Steel
Properties / applications	-	-	-	-	-	-	-	-	-	-
Surface Treatment	Not Provided / Trivalent Chromate / Nickel Plating	Trivalent Chromate / Nickel Plating / Temper Color	Temper Color	Trivalent Chromate / Nickel Plating / Temper Color	Trivalent Chromate / Nickel Plating	Nickel Plating	Not Provided / Trivalent Chromate / Chromate Plating / Nickel Plating	Trivalent Chromate / Nickel Plating / Temper Color	Trivalent Chromate / Nickel Plating	Trivalent Chromate / Nickel Plating / Temper Color
Inner Dia. d(mm)	4.3 ～ 28	3.2 ～ 31	10.2	2.8 ～ 31	3.2 ～ 40.5	3.1	6.4 ～ 23	4.3 ～ 31	6.4 ～ 31.2	3.15 ～ 37.5
I.D. d(inch)	-	-	-	-	-	-	-	-	-	-
Nominal of Thread (M)	4 ～ 27	3 ～ 30	10	2.6 ～ 30	3 ～ 39	3	6 ～ 22	4 ～ 30	6 ～ 30	3 ～ 36
Outer Diameter D(inch)	-	-	-	-	-	-	-	-	-	-
Type	Spring Washer	Spring Washer	Spring Washer	Toothed Washer (Toothed Lock Washer)	Spring Washer	Spring Washer	Spring Washer	Spring Washer	Spring Washer	Spring Washer
Type (Application)	Spring Washer	Spring Washer	Spring Washer	Washer with Threadlocker Adhesive	Spring Washer	Spring Washer	Spring Washer	Spring Washer	Spring Washer	Spring Washer
Unit of Purchase	Sold Individually (No Min. Purchase)	Sold Individually (No Min. Purchase)	Sold Individually (No Min. Purchase)	Sold Individually (No Min. Purchase)	Sold Individually (No Min. Purchase)	Sold Individually (No Min. Purchase)	Sold Individually (No Min. Purchase)	Sold Individually (No Min. Purchase)	Sold Individually (No Min. Purchase)	Sold Individually (No Min. Purchase)
Thickness t (Metric)(mm)	0.8 ～ 5	0.5 ～ 5	2.5	0.3 ～ 1.6	0.45 ～ 3.8	0.7	1.2 ～ 5	0.45 ～ 3	1 ～ 4.2	0.4 ～ 5
Thickness t (Imperial)(inch)	-	-	-	-	-	-	-	-	-	-
Type Spring Washers	Disc Spring	Disc Spring	Standard	-	Serrated Conical Disc Spring	Standard	Disc Spring	Disc Spring	Serrated Conical Disc Spring	Disc Spring
Material: Stainless Steel	SUS304	SUS304	-	-	-	-	-	SUS304	-	-
Surface Treatment (Detailed)	Not Provided / Trivalent Chromate / Nickel Plating	Temper Color	Temper Color	Temper Color / Not Provided / Trivalent Chromate	Not Provided / Trivalent Chromate / Nickel Plating	Not Provided	Not Provided / Trivalent Chromate / Chromate Plating / Nickel Plating	Temper Color / Not Provided	Not Provided / Trivalent Chromate / Nickel Plating	Temper Color / Not Provided / Trivalent Chromate / Nickel Plating
Nominal of Thread (inch)	-	-	-	1/2 ～ 3/8	-	-	-	-	-	1 ～ 1/2
Material Steel	S50C	S50C	SWRH	S50C	S50C	SWRH	S50C	S50C	S50C	S50C
Type Toothed Washer	-	-	-	Internal Teeth Type / External Teeth Type	-	-	-	-	-	-
Cleaning Method	-	-	-	-	-	-	-	-	-	-

Configure

Specification/Dimensions

Environmentally Friendly
- RoHS compliant (10 substances)
Clear

Material
- Steel
- Stainless Steel
- Titanium Class 2
- Aluminum
- Brass
- Phosphor Bronze
- Titanium Class 1
- Nickel Base Alloy
Clear

Properties / applications
- Not Applicable
Details

Clear

Surface Treatment
- Not Provided
- Black Oxide
- Electroless Nickel Plating
- Trivalent Chromate
- Bright Chrome Plating
- Zinc Plating
- Chromate Plating
- Nickel Plating
- Chrome Plating
- Parkerizing
- Anodize
- Dacrotizing
- Polishing
- Painting, Coating
- Silver/Copper/Tin Plating
- Temper Color
- Passivated
Clear

Inner Dia. d(mm)
0.114

0.125

0.141

0.156

0.167

0.172

0.193

0.203

0.252

0.281

0.314

0.344

0.377

0.391

1.05

1.1

1.3

1.5

1.7

1.75

1.8

2.1

2.2

2.25

2.3

2.35

2.4

2.5

2.6

2.7

2.8

2.9

3

3.1

3.15

3.2

3.3

3.4

3.5

3.55

3.6

3.7

3.8

3.9

4

4.1

4.2

4.25

4.3

4.4

4.5

4.7

4.8

5

5.1

5.2

5.25

5.3

5.36

5.4

5.45

5.5

5.8

6

6.1

6.2

6.3

6.4

6.5

6.6

6.8

7

7.1

7.2

7.4

7.5

7.8

8

8.1

8.2

8.3

8.4

8.5

8.6

8.7

8.8

9

9.1

9.3

9.4

9.6

9.8

10

10.2

10.3

10.5

10.6

10.7

10.8

11

11.2

11.4

11.6

11.8

12

12.2

12.5

12.6

12.7

13

13.2

13.3

13.5

13.8

14

14.2

14.3

14.5

14.6

15

15.2

15.5

15.8

15.9

16

16.2

16.5

16.7

16.9

17

17.5

17.7

17.8

18

18.2

18.3

18.7

18.8

18.9

19

19.5

19.7

19.8

20

20.2

20.7

20.9

21

21.4

21.5

21.7

21.75

22

22.1

22.5

22.9

23

23.2

23.4

23.5

23.75

24

24.5

24.75

25

25.2

25.3

25.4

25.5

26

26.1

26.4

26.6

26.75

27

27.5

27.75

27.9

28

28.2

28.4

28.5

29

29.3

29.75

29.8

30

30.1

30.4

30.5

31

31.2

31.4

31.5

31.9

32

32.5

33

33.5

33.7

33.9

34

34.3

34.4

34.5

35

35.75

35.8

36

36.5

37

37.4

37.5

37.75

38

38.5

39

39.5

39.8

40

40.4

40.5

40.6

41

41.7

42

42.5

43

43.2

44

45

45.8

46

47

47.2

47.3

47.5

48

49

49.6

50

51

51.4

51.5

51.8

52

53

53.6

54

54.3

55

56

57

57.3

58

59.1

61.3

61.9

62

63.1

64.2

65

66

67.1

69

69.5

70

71.1

74

75

75.1

78

79.1

79.3

79.7

83.1

87.5

88.9

95.8

99

108.3

112.4
Drawing

Clear

I.D. d(inch)
0.109

0.141

0.148

0.227

0.291

0.355

0.400

0.416

0.450

0.512

0.573

0.827

0.894

0.952

1.077

1.202

1.327

1.640
Drawing

Clear

Nominal of Thread (M)
0.5

1

1.2

1.4

1.6

1.7

2

2.3

2.5

2.6

3

3.5

4

4.5

5

5.1

6

7

8

8.5

9

10

11

12

13

13.5

14

14.5

15

16

17

18

19

20

21

22

23

24

25

26

27

28

30

31

33

34

36

37

38

39

41

42

43

44

45

45.1

45.2

45.3

46

47

48

50

51

52

54

55

55.1

55.2

55.3

56

60

63

64

65.1

65.2

65.3

65.5

65.6

66

68

70

70.2

72

76

80

80.3

85

85.1

85.2

85.3

85.6

90

93.2

95

98.3

105

105.1

105.2

105.3

110

110.3

110.4

110.5

110.6

115

120

125

125.1

125.2

125.4

125.5

130

130.2

135.2

135.3

135.4

135.5

135.6

140.3

140.4

140.5

145.4

145.5

150.2

150.3

150.6

170.2

170.3

170.4

170.5

170.6

180.4

180.5

180.6

210.3

210.4

210.5

210.6

220.5

230.5

235.5

240.5

240.6

250.3

255.6

260.4

260.5

260.6

285.4

330.6
Clear

Outer Diameter D(inch)
0.25

0.270

0.377

0.645

0.698

0.760

0.776

0.869

0.885

1.260

1.459

1.770

2.020

2.250

2.520

2.770

3.270
Drawing

Clear

Type
- Flat Washer
- Spring Washer
- Toothed Washer (Toothed Lock Washer)
- Rosette Washer
- Tab Washer - One-Tabbed / Two-Tabbed
- Nord-Lock Washer
- Tapered Washer
- Spherical Washer
- Decorative Screw Washer
- Hooked Washer for Jig
- Split Washer for Jig
- Square Washer
- Flat Washer with Cover
- Seal Washer
- Pawl Washer
- Washer for Corrugated Sheet
- Retaining / Thread-Locking Spring
Images

Clear

Type (Application)
- Flat Washer
- Spring Washer
- Special Shaped Washer
- Washer with Threadlocker Adhesive
- Washer for Fluid
Clear

Unit of Purchase
Box, Pkg.

Sold Individually (No Min. Purchase)
Clear

Thickness t (Metric)(mm)
0.031

0.05

0.059

0.1

0.15

0.2

0.25

0.29

0.3

0.4

0.45

0.5

0.55

0.6

0.7

0.8

0.9

1

1.1

1.2

1.25

1.3

1.4

1.5

1.6

1.75

1.8

1.9

2

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.85

3

3.2

3.3

3.4

3.45

3.5

3.55

3.6

3.7

3.8

3.9

4

4.1

4.2

4.3

4.5

4.6

4.7

4.8

5

5.1

5.2

5.3

5.4

5.5

5.6

5.8

5.9

6

6.2

6.3

6.4

6.6

6.8

7

7.1

7.2

7.5

7.9

8

8.2

8.3

8.7

9

9.1

9.3

9.5

10

11

11.1

11.2

12

14

15

16

17

18

21

22

23

27

30

32

45
Drawing

Clear

Thickness t (Imperial)(inch)
0.031

0.042

0.044

0.045

0.055

0.056

0.067

0.073

0.088

0.109

0.115

0.125

0.135

0.219
Drawing

Clear

Type Spring Washers
- Standard
- Disc Spring
- Wave
- Serrated Conical Disc Spring
- Bent
Details

Clear

Material: Stainless Steel
254SMO

SUS302

SUS303

SUS304

SUS310S

SUS316

SUS316L

SUS329J4L

Stainless Steel
Clear

Surface Treatment (Detailed)
- Not Provided
- Black Oxide
- Electroless Nickel Plating
- Trivalent Chromate
- Bright Chrome Plating
- Hot Dip Galvanizing
- Chromate Plating
- Nickel Plating
- Black Nickel Plating
- Chrome Plating
- Parkerizing
- Black Anodize
- Dacrotizing
- Barrel, Passivated
- Special Chemical Grinding
- GeoMet Coating
- Baked Paint
- Anti-Seize Coating
- Copper Plating
- Tin Plating
- Lafre
- Black Paint
- Temper Color
- Passivated
Clear

Nominal of Thread (inch)
1

1 1/2

1 1/4

1 1/8

1/2

1 3/8

1/4

2

No. 2

3/4

3/8

No. 4

5/8

5/16

No. 6

7/8

7/16

No. 8

9/16

No. 10

No. 12
Clear

Material Steel
SUM22L

S25C

S45C

S50C

S55C

S60C

S65C

SS400

Carbon Steel

SCM Steel

SPCC

SPHC

SWRH

Spring Steel
Clear

Type Toothed Washer
- Internal Teeth Type
- External Teeth Type
- Star
- Internal External Teeth Type
Images

Clear

Cleaning Method
- Degreasing
- Precision Cleaning
- Electrolytic polishing + precision cleaning
- No cleaning
Clear

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HEIWA HATSUJYO Washers（Unit of Purchase：Sold Individually (No Min. Purchase)）

Configure

Specification/Dimensions

Environmentally Friendly

Material

Properties / applications

Surface Treatment

Inner Dia. d(mm)

I.D. d(inch)

Nominal of Thread (M)

Outer Diameter D(inch)

Type

Type (Application)

Unit of Purchase

Thickness t (Metric)(mm)

Thickness t (Imperial)(inch)

Type Spring Washers

Material: Stainless Steel

Surface Treatment (Detailed)

Nominal of Thread (inch)

Material Steel

Type Toothed Washer

Cleaning Method

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