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1. The characteristics of the Cup Head Square Neck Bolts are that the head is made into a semi-round ball, a square neck is made under the head, and a square hole is also made correspondingly on the connected parts connected with such bolts. When the bolt is inserted into the connecting piece and then screwed on the nut, the bolt will not rotate due to the square neck. Its head is relatively smooth, and it is not easy to hook other objects.
2. Cup Head Square Neck Bolts is mainly used for connecting parts due to structural limitations are not suitable for hex bolts or bolts are required to have a smooth exposed part of the occasion. Such as the feet of agricultural machinery, wall panels and other places. The bolt is divided into two kinds according to the head size: ordinary and large half round head. The head of the large Cup Head Square Neck Bolts is straight and the diameter is large, but its thickness is slightly thin. This kind of bolt is mostly used in trucks, barges, iron and wood looms, and other wooden structural parts, because the head support surface is large, it is not easy to fall into the wooden connector.
| Product Name | Cup Head Square Neck Bolts |
| Material | Carbon steel, Stainless steel |
| Surface Finish | Yellow zinc, Blackened, Blue and white zinc, Bleached |
| Colour | Yellow, Black, Blue White, White |
| Standard Number | DIN 603 |
| Grade | 4.8 6.8 8.8 10.9 A2-70 |
| Diameter | M5 M6 M8 M10 M12 M16 M20 |
| Thread form | Coarse thread, Fine thread |
| Place of origin | Hebei, China |
| Brand | Muyi |
| Pack | Box+cardboard carton+pallet |
| The product can be customized | |
| 1. The characteristics of the Cup Head Square Neck Bolts are that the head is made into a semi-round ball, a square neck is made under the head, and a square hole is also made correspondingly on the connected parts connected with such bolts. When the bolt is inserted into the connecting piece and then screwed on the nut, the bolt will not rotate due to the square neck. Its head is relatively smooth, and it is not easy to hook other objects. 2. Cup Head Square Neck Bolts is mainly used for connecting parts due to structural limitations are not suitable for hex bolts or bolts are required to have a smooth exposed part of the occasion. Such as the feet of agricultural machinery, wall panels and other places. The bolt is divided into two kinds according to the head size: ordinary and large half round head. The head of the large Cup Head Square Neck Bolts is straight and the diameter is large, but its thickness is slightly thin. This kind of bolt is mostly used in trucks, barges, iron and wood looms, and other wooden structural parts, because the head support surface is large, it is not easy to fall into the wooden connector. |
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| Thread Spec D |
M5 | M6 | M8 | M10 | M12 | M16 | M20 | |
| P | thread pitch | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2.5 |
| b | L≤125 | 16 | 18 | 22 | 26 | 30 | 38 | 46 |
| 125＜L≤200 | 22 | 24 | 28 | 32 | 36 | 44 | 52 | |
| L＞200 | / | / | 41 | 45 | 49 | 57 | 65 | |
| dk | MAX | 13.55 | 16.55 | 20.65 | 24.65 | 30.65 | 38.8 | 46.8 |
| MIN | 12.45 | 15.45 | 19.35 | 23.35 | 29.35 | 37.2 | 45.2 | |
| ds | MAX | 5 | 6 | 8 | 10 | 12 | 16 | 20 |
| MIN | 4.52 | 5.52 | 7.42 | 9.42 | 11.3 | 15.3 | 19.16 | |
| k1 | MAX | 4.1 | 4.6 | 5.6 | 6.6 | 8.75 | 12.9 | 15.9 |
| MIN | 2.9 | 3.4 | 4.4 | 5.4 | 7.25 | 11.1 | 14.1 | |
| k | MAX | 3.3 | 3.88 | 4.88 | 5.38 | 6.95 | 8.95 | 11.05 |
| MIN | 2.7 | 3.12 | 4.12 | 4.62 | 6.05 | 8.05 | 9.95 | |
| r1 | ≈ | 10.7 | 12.6 | 16 | 19.2 | 24.1 | 29.3 | 33.9 |
| r2 | MAX | 0.5 | 0.5 | 0.5 | 0.5 | 1 | 1 | 1 |
| r3 | MAX | 0.75 | 0.9 | 1.2 | 1.5 | 1.8 | 2.4 | 3 |
| s | MAX | 5.48 | 6.48 | 8.58 | 10.58 | 12.7 | 16.7 | 20.84 |
| MIN | 4.52 | 5.52 | 7.42 | 9.42 | 11.3 | 15.3 | 19.16 | |
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