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Stainless Steel Pan Head Self Tapping Screws 3.9 X 20 DIN7981 HRC 62

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Stainless Steel Pan Head Self Tapping Screws 3.9 X 20 DIN7981 HRC 62

Brand Name : VDL
Model Number : SPS3920
Certification : ISO 9001
Place of Origin : China
MOQ : Negotiation
Price : Negotiation
Payment Terms : L/C, T/T, Western Union , Paypal
Supply Ability : 1000 , 000 pcs per month
Delivery Time : 30 days
Packaging Details : 10000 pcs each carton in bulk with dimension 20 X 20 X 22 cm, 500 cartons to a 20 ft container
Material : Stainless Steel 18-8
Hardness : HRC 62
Finish : Polishing
Diameter : 3.9
Length : 20
Standard : DIN
Drive : PH
Head : Pan
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Stainless Steel Pan Head Self Tapping Screws 3.9 X 20 DIN7981 HRC 62


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


d3.9
Hmax2.8
min2.55
D7.5
m ( PH )4.4

Unit : mm


Physical Performance


MaterialProperty class / Value
Stainless steel18-8
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


CSiMnSPNCrNi
0.070.0620.0250.04
0.11910.5

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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