Black Steel Hex Socket Head Allen Screw Fastener M5 Knurled Cup Head
Black Zinc plated cup head screws with hex socket drive , full fine threads and flat point with metric size M5 thread diameter based on DIN 912 standard .
Cup head screw with knurling on surface of head for operated easily by hand ; metric threaded shaft is also available for nuts to be installed together to secure objects .
| Thread diameter | 5 |
| Thread length | 20 |
| Head height | 5 |
| Head diameter | 8.5 |
| Hex socket depth | 4 |
| Hex socket width | 3 |
Note : all dimensions are millimeters
Other Specifications for Cup Head Screws
| d | k | L | D | b | s |
| 1.4 | 1.4 | 2～12 | 2.6 | Standard / Customized | 1.3 |
| 1.6 | 1.6 | 3～12 | 3 | Standard / Customized | 1.5 |
| 2 | 2 | 5～16 | 3.8 | Standard / Customized | 1.5 |
| 2.5 | 2.5 | 5～20 | 4.5 | Standard / Customized | 2 |
| 3 | 3 | 5～25 | 5.5 | Standard / Customized | 2.5 |
| 4 | 4 | 8～35 | 7 | Standard / Customized | 3 |
| 5 | 5 | 8～40 | 8.5 | Standard / Customized | 4 |
| 6 | 6 | 10～50 | 10 | Standard / Customized | 5 |
| 8 | 8 | 15～80 | 13 | Standard / Customized | 6 |
Knurled cup head screws are manufactured in carbon steel with tensile grade 4.8 .
| Material code | 1010 |
| Tensile strengh | 420 |
| Hardness | HV160 |
| Density | 7.85 |
| Yiled strength | 365 |
| Ductility | 69 |
Finishing for knurled cup head screws are black oxide , no oil on the surface with corrosion resistance .
| Finishing | Blac oxide |
| Standard | RoHS ( 2002/95-EC ) |
| Thickness | 3 um |
| Color | Black |
Knurled cup head screws with property class 4.8 , are suitable for securing parts with light load like desk ,table ,cabinet ,bed ,window ,small industrial parts .
Advantages
★ Good ductility
★ Torsional resistance
★ Resistant slip
★ Corrosion resistance
★ Long service
Tips for use
1 . Drive cup head screw in hex wrench
2 . Operated by hand or electric drill
3 . Threaded hole drilled as length as screw before installed.
4 . Do not strike screw into material in hammer
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