14 9 ULTRAHIGH TENSILE STRENGTH Hex Socket Head

14. 9 “ULTRA-HIGH TENSILE STRENGTH” Hex Socket Head Cap Screws Yura Sansho Co. , Ltd

Ultra High Tensile Strength 14. 9 Hex Socket Head Cap Screws We have developed 14. 9 ultra-high strength socket head cap screws with KYOKUTO MFG. CO. , LTD. who has advanced technology and good fame in Japan. It is made of the special low alloy steel which have been developed for high tensile strength and for high delayed fracture resistance, called KNDS 4, using MJ thread to improve fatigue strength and realize minimum tensile strength 1, 400 N/mm 2 with elongation 9%. Ultra high tensile strength ■Comparison　of mechanical property Grade Tensile strength （N/mm²）　 0. 2％Yield strength Proof Load Elongation （N/mm²） （％） 8. 8 800 640 580 12 10. 9 1, 000 900 830 9 12. 9 1, 200 1, 080 970 8 14. 9 1, 400 1, 260 1, 120 9 ◆Loosening prevention by the improvement of clamp force and thread accuracy(MJ 4 g 6 g). 　 ◆Realization of compact design by size down according to the improvement of clamp force. ◆Improvement of anti-seizing-tendency by higher tensile strength. ◆Reducing seizing-tendency of the thread and bearing surface by improvement of surface hardness. ◆To cope with leaking oil and other leaking by high axial strength Due to high axial strength, it makes close adhesion with mating bearing surface. Then it can cope with leaking problem. ◆Superior reusability 　In result of increasing surface hardness, superior reusability is realized by preventing deterioration on the thread when tightened. 1

Ultra High Tensile Strength 14. 9 Hex Socket Head Cap Screws Fatigue resistance ・Extension in service life by the improvement of fatigue resistance adopt aerospace specification 「MJ Thread」 adopt the root design and imperfect thread design of stress concentration area for improving fatigue resistance. ■MJ Thread ■The radius of Incomplete thread run out MJ Thread is aerospace specification per ISO 5855. Compared with normal standard, the thread root of MJ thread is shallower and the root radius become larger to　 improve　fatigue resistance by the relaxation of notch effect. . It is to reduce the load of stress concentration area by making the root of incomplete thread round. MJ Thread ●By radius chamfering dice ●By common chamfering dice Regular Thread ■Thread tolerance system　: 　　example M 8 x 1. 25 P (in mm) Pitch diameter tolerance for internal thread (TD 2) ES Basic line Yura 14. 9 ISO-5855 Pitch diameter tolerance for external thread (Td 2) es ei Hex Socket Cap Screws JIS B 1176 (ISO 4762) Hex Cap Screws JIS B 1180 (ISO 4014/4017) High delayed fracture resistance ◆Improvement for the risk against delayed fracture ◆The material is developed for high strength steel bolts with high delayed fracture resistance named KNDS 4 made by Kobe Steel, Ltd. （Please refer the details of KNDS 4 at page 5 -6. ） Diffusible hydrogen Stress Crack occurs at the stress concentration zone Stress ①Reduction of hydrogen intrusion ■ What is the design concept of KNDS 4 whose aim is to improve the delayed fracture resistance? ②Increase of hydrogen trap site ③Improvement of limited diffusible hydrogen amount 2

Specification・Dimension・Stock Range Hex Socket Head Cap Screws KNDS 4 (steel for high strength bolts) made by Kobe Steel, Ltd. 14. 9 1, 400 N/mm² min. 1, 260 N/mm² min. 1, 120 N/mm² min. 9％ min HRC 44～ 50 JIS B 1176/ISO 4746 Property Class Tensile Strength Yield Strength Proof Load Elongation Hardness Specification Min. 120℃ Material Max. 2 P ISO 5855 -1 MJ Thread （Aerospace specification） 4ｇ6ｇ Black oxide Thread Class Surface Finish ■Dimensions　 　 (ｍｍ) Pitch Nominal diameter （ｄ）　 dk da P Max Min M 3 0. 5 5. 68 5. 32 3. 6 M 4 0. 7 7. 22 6. 78 M 5 0. 8 8. 72 M 6 1. 0 M 8 ds Max e k Min Max 3. 00 2. 86 2. 873 3. 00 4. 7 4. 00 3. 82 3. 443 8. 28 5. 7 5. 00 4. 82 10. 22 9. 78 6. 00 1. 25 13. 27 12. 73 9. 2 M 10 1. 5 16. 27 15. 73 M 12 1. 75 18. 27 M 16 2. 0 24. 33 s Min t Nominal Max Min 4. 00 2. 56 2. 52 1. 3 2. 86 3. 82 3 3. 08 3. 02 2. 0 4. 583 5. 00 4. 82 4 4. 095 4. 020 2. 5 5. 82 5. 723 6. 00 5. 70 5 5. 095 5. 020 3. 0 8. 00 7. 78 6. 863 8. 00 7. 64 6 6. 095 6. 020 4. 0 11. 2 10. 00 9. 78 9. 149 10. 00 9. 64 8 8. 115 8. 025 5. 0 17. 73 14. 2 12. 00 11. 73 11. 429 12. 00 11. 57 10 10. 115 10. 025 6. 0 23. 67 18. 2 16. 00 15. 73 15. 996 16. 00 15. 57 14 14. 142 14. 032 8. 0 ■Stock Range 　 5 6 8 10 12 15 16 18 20 22 25 30 M 3 ● ● ● ● ● ○ ○ M 4 ● ● ● ○ ○ M 5 ● ● ● ● ● ○ ○ ○ ○ ○ ● ● ● ● ● ● ● ○ ○ ○ ○ ○ ○ ● ● ● ● ○ ○ M 6 M 8 　 M 10 M 12 　 M 16 　 35 40 45 50 55 60 65 70 75 80 90 100 110 120 130 140 150 　 ○ 　 　 　 ○ ○ ○ ※●Full threaded、○Half threaded 3

Specification・Dimension・Stock Range Hex Socket Head Cap Screws ■Tolerance Class of MJ-4 g 6 g （conform to ISO 5855 -1） 　 Pitch Nominal pitch P (ｍｍ) Major diameter 6 g Pitch diameter 4 g Minor diameter MJ 4 g Root radius MJ 4 g Max Min M 3 0. 5 2. 980 2. 874 2. 655 2. 607 2. 403 2. 324 0. 090 0. 075 M 4 0. 7 3. 978 3. 838 3. 523 3. 467 3. 170 3. 071 0. 126 0. 105 M 5 0. 8 4. 976 4. 826 4. 456 4. 396 4. 052 3. 944 0. 120 M 6 1. 0 5. 974 5. 794 5. 324 5. 253 4. 819 4. 687 0. 180 0. 150 M 8 1. 25 7. 972 7. 760 7. 160 7. 085 6. 529 6. 378 0. 226 0. 188 M 10 1. 5 9. 968 9. 732 8. 994 8. 909 8. 236 8. 060 0. 271 0. 225 M 12 1. 75 11. 966 11. 701 10. 829 10. 734 9. 945 9. 744 0. 316 0. 263 M 16 2. 0 15. 962 15. 682 14. 663 14. 563 13. 653 13. 431 0. 361 0. 300 ※When the tolerance of internal thread is strict, it is recommended to confirm the tolerance 　for fitting or make fitting test in advance because the root radius of MJ specification is　　 　larger compared with normal standard. Because its tolerance class is 4 g 6 g. (It is OK in case it is the standard internal thread of JIS/ISO. ) ■Comparison of tensile load, proof load, tightening strength and torque（for reference) Stress area Min. Tensile load(k. N) Proof load(k. N) Clamping force(k. N)※ Tightening torque(N･m)※ 　 (mm²) 10. 9 12. 9 14. 9 M 3 5. 03 5. 2 6. 1 7. 0 4. 2 4. 9 5. 6 3. 3 3. 9 4. 4 1. 7 2. 0 2. 2 M 4 8. 78 9. 1 10. 7 12. 3 7. 3 8. 6 9. 8 5. 8 6. 8 7. 7 3. 9 4. 6 5. 2 M 5 14. 2 14. 8 17. 3 19. 9 11. 8 13. 9 15. 9 9. 3 10. 9 12. 5 7. 9 9. 3 10. 6 M 6 20. 1 20. 9 24. 5 28. 1 16. 7 19. 5 22. 5 13. 2 15. 5 17. 7 13. 5 15. 8 18. 1 M 8 36. 6 38. 1 44. 6 51. 2 30. 4 35. 5 41. 0 24. 1 28. 2 32. 3 32. 8 38. 4 43. 9 M 10 58. 0 60. 3 70. 8 81. 2 48. 1 56. 3 65. 0 38. 2 44. 7 51. 2 64. 9 76. 0 87. 0 M 12 84. 3 87. 7 103. 0 118. 0 70. 0 81. 8 94. 4 55. 5 64. 9 74. 4 113. 2 132. 4 151. 8 M 16 157. 0 163. 0 192. 0 220. 0 130. 0 152. 0 176. 0 103. 3 120. 9 138. 5 281. 0 328. 8 376. 7 Note: please make sure of the clamp force/torque before tightening. 　※Please conform to JIS B 1083 etc. for detail when used. Because the figures above are 　　for reference. 　※Tightening torque(T)=Kd. F　K=Torque coefficient(0. 17)、d=Nominal diameter、　 　　F=70%Yield load　 4

14. 9 Hex Socket Head Cap Screws With Zinc flake Coating Material KNDS４(steel for high strength bolts and for delayed fracture resistance)　 Tensile Strength 1, 400 N/mm² Yield Strength Hardness Thread 1, 260 N/mm² HRC 44～ 50 ISO 5855－1　MJ Thread （Aerospace specification） Thread Class 4 g 6 g （Before coating） ※Maximum thread tolerance 4 h after coating Surface Treatment Micro-layer anti-corrosion coating with zinc flake Chromium-Free Surface Treatment ※Dimension is the same with standard products at Page 3. ☞Realization of Fastener with ultra-high tension and anti-corrosion!! ■Stock Range 　 10 12 15 16 20 25 30 M 6 ● ● ● ● M 8 　 ● ● ● ● ● M 10 M 12 　 35 40 45 50 ● ● ○ ○ ○ ● ● ● ※●Full threaded、○Half threaded High corrosion resistance ・Without the risk of hydrogen embrittlement fracture 　 Because no hydrogen occurs in process of coating. ・Thin and uniform coating with high anti-corrosion characteristic Clean hexagon socket Clear more than 1000 hours of salt spray test 4 H Go-ring gauge test after anti-corrosion coating by sampling. 5

Reference ■Chemical composition of KNDS 4 （％） Material C Si Mn P S Ni Cr Mo Ti V KNDS 4 0. 42 0. 06 0. 53 0. 007 0. 004 0. 54 1. 00 0. 97 0. 050 0. 070 SCM 440 0. 41 0. 20 0. 72 0. 013 0. 010 - 1. 01 0. 18 - - Tensile strength （N/㎟） 1, 300～ 　 1, 400 1, 000～ 1, 200 It is to improve delayed fracture resistance and make high tensile strength characteristic possible by reducing「Si・Mn・P・S」and increasing「Ni・Mo・Ti・V」. ■Application temperature 14. 9 hex socket head cap screws keep a superior mechanical property as the following table even under high temperature environment. 0. 2%Yield strength under high temperature Temperature 300℃ 400℃ （500℃） 14. 9 90% 83% 64% 12. 9 75% - - 10. 9 75% - - ※The figure in the table is the percentage of 0. 2 yield strength at room temperature. ※The data is for reference and it is not recommended to be used at 500℃. When a high temperature state continues, the relaxation that shall be considered as important may occur. For example, it is considered that when bolts are held to 100 hours at 300℃ high temperature, the initial clamp force will decrease more than 25% due to the decline of yield strength. So it is essential to confirm the operating environment before using. ■Fatigue test report 　・Test Sample 　 　14. 9 Hex Socket Head Cap Screws　 　 　M 10 x 50 L x 32 S S/N Curve（14. 9 Socket Head Cap Screws M 10 x 50 x 32） add alternate load to direction of axial until breakage and count the number of cycle, then make S/N curve. fix 70% of yield strength for mean tress and change stress amplitude. Maximum number of cycle is by 5ｘ 106（5, 000）. Stress amplitude　σa　(N/mm 2) 　・Method of the test 　　Conform to JIS B 1081 Labo: Kishiwada Stainnless Co. Ltd. Tester : made by Shikadzu corpration Turbo pulsa Model EHF-EV 200 K 1 -040 -0 A Cycles to Failure　N 6 ※ All rights reserved. ※ Contents will be changed without notice.

Yura Sansho Co. , Ltd. [HEAD OFFICE] 4 -8 -17, Itachibori, Nishi-Ku, Osaka, 550 -0012 TEL +81 -6 -6532 -1331 FAX +81 -6 -6532 -1369 ISO 14001: 2001/ISO 9001: 2004 Certified Distributor Home page : http: //www. yura-sansyo. co. jp/tokuhan/ E-mail address : tokuhan@yura-sansyo. co. jp All rights reserved. © 2012 YURA SANSHO CO. , LTD ※ Contents will be changed without notice. 2016. 4. 14