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M6 Stainless Steel SEMS Screws Hex Socket Allen Head Metal Screws Assembled Washers
Stainless steel SEMS screws are combined with a Flat washer and a flat washer and both washers are put on the shaft of SEMS screw , under shaft is threaded length that diameter is more bigger than the shaft diameter for prevent both washers from slipping out and play a secure role on objects .
Cup head SEMS screw with inside hex socket , you can take a hex wrench to drive screws by hand , when SEMS screws are installed on material , flat washer or spring washer increase more frictions on material and screws are not easy to be loosen and backed out .
Specification
Stainless steel SEMS screws with size M4 X 20 mm with attached standard flat washer and spring washer .
| Head diameter | D | 10.8 |
| Thread length | L1 | 8 |
| Shaft diameter | d | M6 |
| Flat washer size | Standard | 1.5 X 12 |
| Spring washer size | Standard | 1.5 X 10.5 |
| Full length | L | 15 |
| Head height | H | 6 |
| Socket depth | t | 4 |
| Socket width | S | 5.5 |
Perfect features
● Good ductility
● High tensile strength
● No magnet
● Corrosion resistant
● Fine roughness
Mechanical Performance
| Material | Property class / Value |
| Stainless steel | 18-8 |
| Tensile strength σb (MPa) | 650 |
| Yield Strength σs (MPa) | 320 |
| Elongation δ5 (%) | 35 |
| Reduction of area ψ (%) | 45 |
| Density g/cm3) | 7.98 |
Finish
Stainless steel cup head SEMS screws are polished surface with good brightness
| Finish | Polishing |
| Roughness | R6.3 |
| Surface request | No burrs and bright |
How to install SEMS screws
1 , Drill a threaded hole on work piece , the hole sizes are same as the SEMS screw’s .
2 , Put SEMS screw into hole and rotate screw to the surface of work piece .
3 , Further secure screws and tighten screws in work piece .
Applications
SEMS Screws have a wide applications in industry and make a important roles on secure and joint .
★ Aerospace
★ Cars
★ Vessel
★ Trains
★ Household applicanes
★ Machines
★ Buliding
★ Decoration
★ Electric items
★ Official items
★ Communication
Characteristics
▲ Wide versatility
▲ Top material
▲ Quick installation
▲ Convenient operation
▲ Simple deign
▲ Recylable
▲ Eco-friendly
▲ Standard Sizes
Tips for installations
1 , Stainless steel SEMS screws are polished and surface is bright , please don’t strike screws into material during installation for keep nice appearance , especially for decorative applications .
2 , Please take right and suitable screwdriver bits to drive stainless steel self tapping screws for more quick installation .
