JiangYin XiangGu Hardware Products Co.,Ltd
JiangYin XiangGu Hardware Products Co.,Ltd Focus on supplying high quality fasteners.
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Product Description:
Metric class 12.9 hex caps screws and hex bolts have the highest tensile strength that compares to grade 9.These fasteners are utilized in heavily stressed machinery and large equipment.
Choose these Class 12.9 steel screws for heavy duty stamping applications as well as earth-moving machinery such as bulldozers and excavators. With a tensile strength of 170,000 psi, they are 10% stronger than our other metric steel screws. Dimensions meet ISO 4017 (formerly DIN 933) specifications. Length is measured from under the head.
Zinc yellow-chromate plated steel screws resist corrosion in wet environments.
Product Features:
Bolts are headed,externally threaded fasteners used to keep two objects,often metal or wood,in a fixed position relative to one another.
Unlike screws,which cut their own threads,bolts pair with the internal threads of nuts to stay in place and ensure the desired level of tension in the bolted joint.
The use of nuts aids in disassembly and reassembly.In addition,bolts generally have a greater load bearing capacity than screws but lack a tapered shaft.The head style of the bolt determines the tool required for tightening and loosening.
Bolts are responsible for holding together everything from furniture to machinery to bridges.
Mechanical and physical properties:
| Property Class | Class 12.9 |
| Tensile Strength | 1200Mpa min. |
| Stress at 0.2% permanent strain | 1080Mpa min. |
| Percentage elongation after fracture for machined test pieces, A, % | 8 min. |
| Percentage reduction of area after fracture for machined test pieces, Z, % | 44 min. |
| Rockwell hardness, HRC | 39-44 |
Product Drawing:
| Hexagon head bolts-Full thread--Product grades A and B | ||||||||
| ISO4017 & GB/T5783 | ||||||||
 | ||||||||
| d | P(mm) | k(mm) | s(mm) | |||||
| A | B | min | max | |||||
| min | max | min | max | A | B | |||
| M1.6 | 0.35 | 0.975 | 1.225 | 0.9 | 1.3 | 3.02 | 2.9 | 3.2 |
| M2 | 0.4 | 1.275 | 1.525 | 1.2 | 1.6 | 3.82 | 3.7 | 4 |
| M2.5 | 0.45 | 1.575 | 1.825 | 1.5 | 1.9 | 4.82 | 4.7 | 5 |
| M3 | 0.5 | 1.875 | 2.125 | 1.8 | 2.2 | 5.32 | 5.2 | 5.5 |
| M3.5 | 0.6 | 2.275 | 2.525 | 2.2 | 2.6 | 5.82 | 5.7 | 6 |
| M4 | 0.7 | 2.675 | 2.925 | 2.6 | 3 | 6.78 | 6.64 | 7 |
| M5 | 0.8 | 3.35 | 3.65 | 3.26 | 3.74 | 7.78 | 7.64 | 8 |
| M6 | 1 | 3.85 | 4.15 | 3.76 | 4.24 | 9.78 | 9.64 | 10 |
| M8 | 1.25 | 5.15 | 5.45 | 5.06 | 5.54 | 12.73 | 12.57 | 13 |
| M10 | 1.5 | 6.22 | 6.58 | 6.11 | 6.69 | 15.73 | 15.57 | 16 |
| M12 | 1.75 | 7.32 | 7.68 | 7.21 | 7.79 | 17.73 | 17.57 | 18 |
| M14 | 2 | 8.62 | 8.98 | 8.51 | 9.09 | 20.67 | 20.16 | 21 |
| M16 | 2 | 9.82 | 10.18 | 9.71 | 10.29 | 23.67 | 23.16 | 24 |
| M18 | 2.5 | 11.29 | 11.72 | 11.15 | 11.85 | 26.67 | 26.16 | 27 |
| M20 | 2.5 | 12.29 | 12.72 | 12.15 | 12.85 | 29.67 | 29.16 | 30 |
| M22 | 2.5 | 13.79 | 14.22 | 13.65 | 14.35 | 33.38 | 33 | 34 |
| M24 | 3 | 14.79 | 15.22 | 14.65 | 15.35 | 35.38 | 35 | 36 |
| M27 | 3 | / | / | 16.65 | 17.35 | / | 40 | 41 |
| M30 | 3.5 | / | / | 18.28 | 19.12 | / | 45 | 46 |
| M33 | 3.5 | / | / | 20.58 | 21.42 | / | 49 | 50 |
| M36 | 4 | / | / | 22.08 | 22.92 | / | 53.8 | 55 |
| M39 | 4 | / | / | 24.58 | 25.42 | / | 58.8 | 60 |
| M42 | 4.5 | / | / | 25.58 | 26.42 | / | 63.1 | 65 |
| M45 | 4.5 | / | / | 27.58 | 28.42 | / | 68.1 | 70 |
| M48 | 5 | / | / | 29.58 | 30.42 | / | 73.1 | 75 |
| M52 | 5 | / | / | 32.5 | 33.5 | / | 78.1 | 80 |
| M56 | 5.5 | / | / | 34.5 | 35.5 | / | 82.8 | 85 |
| M60 | 5.5 | / | / | 37.5 | 38.5 | / | 87.8 | 90 |
| M64 | 6 | / | / | 39.5 | 40.5 | / | 92.8 | 95 |
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