Black Steel Hex Socket Head Allen Screw Fastener M5 Knurled Cup Head
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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