Hex Socket Cup Head Stainless Steel Self Tapping Screws UNF 5.5
Thread Fastener
High tensile strength cup head self tapping screws with
self-tapping threads to drill wooden or metal and non-metal sheet
without pre-drilling holes , sharp point with 30 degree .
Cup head self tapping screw has a hex socket and use a hex wrench
to operate it ; Coarse full threads to the under head is intended
to cut material more deep and secure well .
● No burrs
● Cost-effective
● Bright surface
● Eco-friendly
Material
Cup head self tapping screws are made of stainless steel with
property class 18-8 which with good anti-corrosion performance
Chemical elements
| C | Si | Mn | S | P | N | Cr | Ni |
| 0.07 | 0.06 | 2 | 0.025 | 0.04 | 0.1 | 19 | 10.5 |
Physical performance
| Tensile strength ( σb (MPa) | 535 |
| Yield Strength σs (MPa) | 210 |
| Elongation δ5 (%) | 50 |
| Reduction of area ψ (%) | 65 |
| Density g/cm3) | 7.93
|
Specification
| Thread diameter | d | 5 |
| Thread length | L | 50 |
| Head height | H | 5 |
| Head diameter | D | 8.5 |
| Hex socket depth | | 4 |
| Hex socket width | | 1.9 |
Note : all dimensions are millimeters
Finishing
| Finishing | Polish |
| Standard | RoHS ( 2002/95-EC ) |
| Thickness | 3 um |
| Color | Grey |
Advantages
★ Good ductility
★ Torsional resistance
★ High tensile strength
★ Corrosion resistance
★ Long service
★ Hard material
Applications
Stainless steel cup head self tapping screws are normally used to
secure wooden and thin metal or non-metal sheets , especially for
furniture ,ceiling board ,chipboard ,widows and doors .
Tips for use
1 . Drive cup head self tapping screw in hex wrench
2 . Operated by hand or electric drill
3 . A small locating point on sheet before drive screw .
4 . Do not strike stainless steel screw in hammer
Packing information for screws
| Size | 5 x 50 |
| Weigt kg / 1000 pcs | 8.5 |
| QTY / BOX | 500 |
