Ningbo Boman Mechanical & Technology Co.,Ltd
Address: Room 908, 95 International Plaza, No.586 Jiangnan Road, High-Tech Zone, Ningbo
Tel : +86-0574-87227822
Fax: +86-0574-87831922

Back up-Ring Size Table-1

STANDARD NO: MS-28774

DASH
NO.

ID

T

W

DASH
NO.

ID

T

W

DASH
NO.

ID

T

W

004

2.77

1.23
± 
0.09

1.35
± 
0.03

140

57.35

1.23
± 
0.09

2.19
± 
0.09

332

60.78

1.78
± 
0.13

4.65
± 
0.03

005

3.15

141

58.93

333

63.96

006

3.56

142

60.53

334

67.13

007

4.34

143

62.10

335

70.31

008

5.13

144

63.70

336

73.48

009

5.94

145

65.28

337

76.66

010

6.73

146

66.88

338

79.83

011

8.31

147

68.45

339

83.13

012

9.91

148

70.05

340

86.31

013

11.56

149

71.63

341

89.48

014

13.16

210

19.46

1.23
± 
0.09

3.03
± 
0.03

342

92.66

015

14.73

211

21.03

343

95.83

016

16.33

212

22.63

344

99.01

017

17.91

213

24.21

345

102.3

018

19.51

214

25.81

346

105.5

019

21.08

215

27.38

347

108.7

020

22.81

216

28.89

348

118.8

021

24.38

217

30.56

349

115

022

25.98

218

32.16

425

115.6

2.67
± 
0.12

6.01
± 
0.01

023

27.56

219

33.88

426

118.8

024

29.16

220

35.48

427

121.9

025

30.73

221

37.06

428

125.1

026

32.33

222

38.66

429

128.3

027

33.91

223

41.83

430

131.5

028

35.51

224

45.01

431

134.6

110

9.91

1.23
± 
0.09

2.19
± 
0.09

225

48.48

432

137.8

111

11.48

226

51.36

433

141

112

13.08

227

54.53

434

144.2

113

14.66

228

57.71

435

147.3

114

16.26

229

60.88

436

150.5

115

17.83

230

64.06

437

153.7

116

19.43

231

66.83

438

158.8

117

21.13

232

70.00

439

165.2

118

22.73

233

73.18

440

171.5

119

24.31

234

76.35

441

177.9

120

25.91

235

79.53

442

184.2

121

27.48

236

82.70

443

190.6

122

29.08

237

85.88

444

196.9

123

30.66

238

89.05

445

203.3

124

32.26

239

92.2

446

216

125

33.83

240

95.38

447

228.7

126

35.48

241

98.55

448

241.4

127

37.06

242

101.7

449

254.1

128

38.66

243

104.9

450

266.8

129

40.23

244

108.1

451

279.5

130

41.83

245

111.3

452

292.3

131

43.41

246

114.4

453

304.9

132

45.01

247

117.6

454

317.6

133

46.58

325

114.6

1.78
± 
0.13

4.65
± 
0.03

455

330.3

134

48.18

326

41.55

456

343

135

49.76

327

44.78

457

355.7

136

51.36

328

47.96

458

368.4

137

52.93

329

51.13

459

381.1

138

54.53

330

54.31

460

393.8

139

56.11

331