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Click Specification

(Non-preferred) dimensions in parentheses.

Unit:mm

Raised Countersunk Head Screws with Cross Recess

GB /T 820 - 2015

Display drawing:

国标GB /T820 - 2015 GB820 820GB Raised Countersunk Head Screws with Cross Recess
Download CAD Model
国标GB /T820 - 2015 GB820 820GB Raised Countersunk Head Screws with Cross Recess
Download CAD Model
Calculate weight and price. Weight 1000 pcs : kg x $ per kg = $ 1000 pcs
Default density g/cm3
×

Choose materials based on density.(g/cm3)

  • Carbon Steel 7.85
  • Stainless Steel 8.1
  • Stainless Steel 7.95
  • Stainless Steel 7.7
  • Titanium Alloy 4.5
  • Aluminum Alloy 2.8
  • Copper 8.89


Select here or enter material density on the calculation page.
Nominal Length L Tips:seclect Nominal Length L and get Weight Thread length.
Screw Thread
d
M1.6 M2 M2.5 M3 (M3.5) M4 M5 M6 M8 M10
P Pitch
a max
dk theor. max
Actual max=nominal size
min
f ≈
k max=nominal size
r max
R ≈
x max
Socket No.
M1 Ref.
M2 Ref.
Penetration depth type H max
min
type Z max
min
0.35 0.4 0.45 0.5 0.6 0.7 0.8 1 1.25 1.5
0.7 0.8 0.9 1 1.2 1.4 1.6 2 2.5 3
3.6 4.4 5.5 6.3 8.2 9.4 10.4 12.6 17.3 20
3 3.8 4.7 5.5 7.3 8.4 9.3 11.3 15.8 18.3
2.7 3.5 4.4 5.2 6.94 8.04 8.94 10.87 15.37 17.78
0.4 0.5 0.6 0.7 0.8 1 1.2 1.4 2 2.3
1 1.2 1.5 1.65 2.35 2.7 2.7 3.3 4.65 5
0.4 0.5 0.6 0.8 0.9 1 1.3 1.5 2 2.5
3 4 5 6 8.5 9.5 9.5 12 16.5 19.5
0.9 1 1.1 1.25 1.5 1.75 2 2.5 3.2 3.8
0 0 1 1 2 2 2 3 4 4
1.9 2 3 3.4 4.8 5.2 5.4 7.3 9.6 10.4
1.9 2.2 2.8 3.1 4.6 5 5.3 7.1 9.5 10.3
1.2 1.5 1.85 2.2 2.75 3.2 3.4 4 5.25 6
0.9 1.2 1.5 1.8 2.25 2.7 2.9 3.5 4.75 5.5
1.2 1.4 1.75 2.08 2.7 3.1 3.35 3.85 5.2 6.05
0.95 1.15 1.5 1.83 2.25 2.65 2.9 3.4 4.75 5.6
Weight of per 1000 steel products(≈kg)
- - - - - - - - - -
Length of Thread b min
- - - - - - - - - -
①,The thread diameter of the unthreaded portion is approximately equal to the pitch diameter or allowed to equal the major thread diameter

Alternative history

GB /T 820 - 1985 GB /T 820 - 2000 GB /T 820 - 2015

Suppliers

Best price if from GlobalFastener.com.
Jiangsu BofanKe Precision Metal Technology Co., Ltd.

  • Director Tang

  • +86-15298892886/15262400870

  • +86-516-86839568

  • Material: stainless steel, carbon steel; Nominal diameter: M1-M14; Nominal length: 5-400mm
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