Stainless Steel Self Tapping Screws Pan Head DIN7981 A2-70 Fastener
Stainless Steel Self Tapping Screws Pan Head DIN7981 A2-70 Fastener
Pan head with phillips drive stainless steel screws , sharp point with full tapping threads for secure metal or wooden or plastic objects . stainless steel self tapping screws with self tapping threads that can cut material when screws are being installed .
Stainless steel self tapping screw is made of austenitic stainless steel grade ANSI 18-8 with perfect features
● Good ductility
● High tensile strength
● No magnet
● Corrosion resistant
● Fine roughness
● Resistant high temperature
Specification
| d | 3.9 | |
| H | max | 2.8 |
| min | 2.55 | |
| D | 7.5 | |
| m ( PH ) | 4.4 | |
Unit : mm
Physical Performance
| Material | Property class / Value |
| Stainless steel | 18-8 |
| Density g/cm3) | 7.98 |
| Fusing point(℃) | 1398~1454 |
| Specific heat capacity(0~100℃,KJ·kg-1K-1) | 0.5 |
| Heat conductivity(W·m-1·K-1) | (100℃)16.3, 500℃)21.5 |
| Resistivity(20℃,10-6Ω·m) | 0.73 |
Mechanical Properties
Core hardness : HV 250
Case hardness : HV720
Min torque : 2.3 N.m ( property class 20 H )
Tensile strength σb (MPa) : 650
Yield Strength σs (MPa) : 320
Elongation δ5 (%) : 35
Reduction of area ψ (%) : 45
Chemical Elements
| C | Si | Mn | S | P | N | Cr | Ni |
| 0.07 | 0.06 | 2 | 0.025 | 0.04 |
0.1 | 19 | 10.5 |
Finish
Stainless steel self tapping screws are passived with grey color for improving anti-corrosion effect
Resistant Corrosion
Stainless steel self tapping screws with 18-8 grade , different “ carbon ” contents that resist corrosion time under temperature 550 degree to 925 degree .
Note : Refer to Standard GB /T 3098.21
Applications
Normally , There are much applications in every fields for Stainless steel self tapping screws as its versatility .
★ Aerospace
★ Cars
★ Vessel
★ Trains
★ Household applicanes
★ Machines
★ Buliding
★ Decoration
★ Toys
★ Electric items
★ Official items
★ Furniture
★ Communication
★ Food industry
★ Medical apparatus
★ Dinnerware
Characteristics
▲ Wide versatility
▲ Top material
▲ Quick installation
▲ Convenient operation
▲ Simple deign
▲ Recylable
▲ Eco-friendly
▲ Standard Sizes
Tips for installations
Stainless steel self tapping screws are polished and surface is bright , please don’t strike screws into material during installation for keep nice appearance , especially for decorative applications .
Please take right and suitable screwdriver bits to drive stainless steel self tapping screws for more quick installation .
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