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Hex Socket Head Cap Screws Carbon Steel Black Zinc M8 DIN 912 Bolt
Carbon steel socket cap screws with partial or full threads flat point , socket cap screw is also named as cup head screw , normally , the thread length is 2/3 of shaft length , and sometimes to be made in full threads for special applications .
Specifications
Specifications for hex socket cap screws involve M2 to M36
| d | D | K | S | b | L |
| 2 | 3.8 | 2 | 1.5 | 16 | 2-600 |
| 2.5 | 4.5 | 2.5 | 2 | 17 | |
| 3 | 5.5 | 3 | 2.5 | 18 | |
| 4 | 7 | 4 | 3 | 20 | |
| 5 | 8.5 | 5 | 4 | 22 | |
| 6 | 10 | 6 | 5 | 24 | |
| 8 | 13 | 8 | 6 | 28 | |
| 10 | 16 | 10 | 8 | 32 | |
| 12 | 18 | 12 | 10 | 36 | |
| 14 | 21 | 14 | 12 | 40 | |
| 16 | 24 | 16 | 14 | 44 | |
| 18 | 27 | 18 | 14 | 48 | |
| 20 | 30 | 20 | 17 | 52 | |
| 22 | 33 | 22 | 17 | 56 | |
| 24 | 36 | 24 | 19 | 60 | |
| 30 | 45 | 30 | 22 | 72 | |
| 33 | 50 | 33 | 24 | 78 | |
| 36 | 54 | 36 | 27 | 84 |
Note : all dimensions are millimeters
Material
Hex socket cap screws property class from 4.8 to 12.9 that includes material low carbon steel and medium carbon steel and stainless steel
Stainless steel
SUS 201 , SUS303 , SUS 304 ,SUS 316 , SUS 416 ,SUS 430 and SUS 420
Carbon steel
1008 , 1010 , 1018 , 1022 , 1035 , 1045 , SCM 435 and 40CRO
Finishing for hex cap screws covers zinc , nickel , tin . chrome . brass , dacromet , polish and passive
| Finishing | Colors | Thickness | Charicteristic |
| Zinc | Blue ,White ,Black ,Yellow | 5-107μm | Bright and smooth surface ,corrosion resistance |
| Nickel | Silver | 1～3μm | Wear resistance ,bright appearance , anti-corrosion |
| Polishing | Silver | 0.01mm ( reference ) | Improving brightness of surface |
| Tin | Silver | 0.13～1.27μm | Good ductility ,corrosion resistance ,lower melting point ,eco-friendly ,brightness |
| Brass | Copper | 5gm～8gm | Good dispersibility ,Bright appearance |
| Dacromet | Grey | 4-8μm | High corrosion resistance , No hydrogen embrittlement ,Heat resistance ,Easy to plated more ,eco-friendly |
| Chrome | Silver white | 0．25～0．5μm | Harden surface ,Bright surface ,Heat resistance ,Wear resistance Corrosion resistance and eco-friendly |
Advantages
★ Good ductility
★ Torsional resistance
★ Resistant slip
★ Corrosion resistance
★ Long service
★ High tensile strength
Tips for use
1 . Drive hex socket head cap screw in hex wrench or by hand
2 . Threaded hole drilled as length as screw’s before installed
3 . Do not strike screw into material in hammer
4 . Fasten hex cap head screws in wrench .
DIN 912 hex socket cap screws