Hex Socket Head Cap Screws 1 4 . 9 “ULTRA-HIGH TENSILE STRENGTH” Hex Socket Head Cap Screws Yura Sansho Co., Ltd

Ultra high tensile strength 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 KNDS4, using MJ thread to improve fatigue strength and realize minimum tensile strength 1,400N/mm2 with elongation 9%. Ultra high tensile strength ■Comparison　of mechanical property Grade Tensile strength （N/mm²）　 0.2％Yield strength （N/mm²） Proof Load Elongation （％） 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 ◆Loosening prevention by the improvement of clamp force and thread accuracy(MJ4g6g). ◆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

High delayed fracture resistance 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 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. MJ Thread Regular Thread ■The radius of Incomplete thread run out It is to reduce the load of stress concentration area by making the root of incomplete thread round. ●By radius chamfering dice ●By common chamfering dice ■Thread tolerance system　:　　example M8 x 1.25P (in mm) Pitch diameter tolerance for internal thread (TD2) Pitch diameter tolerance for external thread (Td2) Basic line ES es ei Yura 14.9 ISO-5855 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 KNDS4 made by Kobe Steel, Ltd. （Please refer the details of KNDS4 at page5-6.） Stress concentration zone Diffusible hydrogen Crack occurs at the stress concentration zone ①Reduction of hydrogen intrusion ②Increase of hydrogen trap site ③Improvement of limited diffusible hydrogen amount ■ What is the design concept of KNDS4 whose aim is to improve the delayed fracture resistance? 2

Specification・Dimension・Stock Range Hex Socket Head Cap Screws Material KNDS4 (steel for high strength bolts) made by Kobe Steel, Ltd. Property Class 14.9 Tensile Strength 1,400N/mm² min. Yield Strength 1,260N/mm² min. Proof Load 1,120N/mm² min. Elongation 9％ min Hardness HRC 44～50 Specification JIS B 1176/ISO 4746 Thread ISO5855-1 MJ Thread （Aerospace specification） Thread Class 4ｇ6ｇ Surface Finish Black oxide Min.120℃ Max. 2P ■Dimensions　 (ｍｍ) Nominal diameter （ｄ）　 Pitch dk da ds e k s t P Max Min M3 0.5 5.68 5.32 3.6 3.00 2.86 2.873 4.00 2.5 2.56 2.52 1.3 M4 0.7 7.22 6.78 4.7 3.82 3.443 3 3.08 3.02 2.0 M5 0.8 8.72 8.28 5.7 5.00 4.82 4.583 4 4.095 4.020 M6 1.0 10.22 9.78 6.8 6.00 5.82 5.723 5.70 5 5.095 5.020 3.0 M8 1.25 13.27 12.73 9.2 8.00 7.78 6.863 7.64 6 6.095 6.020 4.0 M10 1.5 16.27 15.73 11.2 10.00 9.149 9.64 8 8.115 8.025 5.0 M12 1.75 18.27 17.73 14.2 12.00 11.73 11.429 11.57 10 10.115 10.025 6.0 M16 24.33 23.67 18.2 16.00 15.996 15.57 14 14.142 14.032 8.0 ■Stock Range 5 6 8 10 12 15 16 18 20 22 25 30 35 40 45 50 55 60 65 70 75 80 90 100 110 120 130 140 150 M3 ● ○ M4 M5 M6 M8 M10 M12 ○　 M16 ※●Full threaded、○Half threaded 3

Tightening torque(N･m)※ Specification・Dimension・Stock Range Hex Socket Head Cap Screws ■Tolerance Class of MJ-4g6g （conform to ISO 5855-1） (ｍｍ) Nominal pitch Pitch Major diameter 6g Pitch diameter 4g Minor diameter MJ4g Root radius MJ4g P Max Min M3 0.5 2.980 2.874 2.655 2.607 2.403 2.324 0.090 0.075 M4 0.7 3.978 3.838 3.523 3.467 3.170 3.071 0.126 0.105 M5 0.8 4.976 4.826 4.456 4.396 4.052 3.944 0.144 0.120 M6 1.0 5.974 5.794 5.324 5.253 4.819 4.687 0.180 0.150 M8 1.25 7.972 7.760 7.160 7.085 6.529 6.378 0.226 0.188 M10 1.5 9.968 9.732 8.994 8.909 8.236 8.060 0.271 0.225 M12 1.75 11.966 11.701 10.829 10.734 9.945 9.744 0.316 0.263 M16 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 4g6g. (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(kN) Proof load(kN) Clamping force(kN)※ Tightening torque(N･m)※ (mm²) 10.9 12.9 14.9 M3 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 M4 8.78 9.1 10.7 12.3 7.3 8.6 9.8 5.8 6.8 7.7 4.6 M5 14.2 14.8 17.3 19.9 11.8 13.9 15.9 9.3 12.5 7.9 10.6 M6 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 M8 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 M10 58.0 60.3 70.8 81.2 48.1 56.3 65.0 38.2 44.7 64.9 76.0 87.0 M12 84.3 87.7 103.0 118.0 70.0 81.8 94.4 55.5 74.4 113.2 132.4 151.8 M16 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)=KdF　K=Torque coefficient(0.17)、d=Nominal diameter、　 　　F=70%Yield load　 4

High corrosion resistance 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 1,260 N/mm² Hardness HRC 44～50 Thread ISO 5855－1　MJ Thread （Aerospace specification） Thread Class 4g6g （Before coating） ※Maximum thread tolerance 4h 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!! 10 12 15 16 20 25 30 35 40 45 50 M6 ● M8 ○ M10 M12 ※●Full threaded、○Half threaded ■Stock Range 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 than1000 hours of salt spray test 4H Go-ring gauge test after anti-corrosion coating by sampling. 5

0.2%Yield strength under high temperature Reference ■Chemical composition of KNDS4 Material （％） Tensile strength （N/㎟） C Si Mn P S Ni Cr Mo Ti V KNDS4 0.42 0.06 0.53 0.007 0.004 0.54 1.00 0.97 0.050 0.070 1,300～ 　 1,400 SCM440 0.41 0.20 0.72 0.013 0.010 - 1.01 0.18 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 ※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 to100 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　 　 　M10 x 50L x 32S 　・Method of the test 　　Conform to JIS B 1081 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 5ｘ106（5,000,000）. S/N Curve（14.9 Socket Head Cap Screws M10 x 50 x 32） Stress amplitude　σa　(N/mm2) Labo: Kishiwada Stainnless Co. Ltd. Tester : made by Shikadzu corpration Turbo pulsa Model EHF-EV200K1-040-0A Cycles to Failure　N ※ All rights reserved. ※ Contents will be changed without notice. 6

4-8-17, Itachibori, Nishi-Ku, Osaka, 550-0012 TEL +81-6-6532-1331 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 ※ Contents will be changed without notice. All rights reserved . ©2012 YURA SANSHO CO.,LTD 2016.4.14