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Cross-Recessed Countersunk Head Machine Screw【1-13,000 Pieces Per Package】 (Part Numbers)

Cross-Recessed Countersunk Head Machine Screw

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  • Volume Discount

[Materials] Equivalent to SWCH, Equivalent to Stainless Steel SUS304, SUS316L, SUS430, Titanium Brass
[Specifications] None, non-chrome, non-chrome (zinc plating) chromate color, non-chrome (zinc plating) black, non-chrome black, trivalent chromate, non-chrome plating white, trivalent black, trivalent white, bright chromate plating, Hot dip galvanized, chromate plating, green chromate, black chromate, nickel plating, black nickel, chrome plating, black chrome, Parkerizing, Dacrotized, stainless steel coating, trivalent stainless steel coating, stainless steel plating, copper plating, German brown plating, tin cobalt, nickel with loosening-prevention agent + ALOK loosening-prevention agent, bright chromate plating + ALOK loosening-prevention agent, trivalent black + ALOK loosening prevention agent
[ Nominal designation of thread (M)] 2/2.3/2.5/2.6/3 /3.5/4/4.5/5/6/8/10/12
[Length L (mm)] 2.5 to 150
[Detailed shape] Plate
[Tip shape] Flat end
[Screw thread type] Metric coarse
[Pitch (mm )] 0.4/0.45/0.5/0.6/0.7/0.75/0.8/1/1.25/1.5/1.75
[Screw type] Full thread

(i)Caution

  • Since the film thickness of hot zinc plating is very thick, please select products with the same surface treatment on the other side.
  • There are some differences from the handling on the standard table. Please understand in advance.
  • This product image is a representative image. For details, see the product standard.
    *"Other special treatment" of surface treatment has the following specifications.
    3W-ZEC: ZEC Coat-Trivalent Base White
    3B-ZEC:ZEC Coat-Trivalent Base Black
    AEN:ZEC Coat-Substrate Zinc Plating

PDF

Japanese Only

Drawing

External Shape Drawing of Cross-Recessed Countersunk Machine Screw

Specifications Table

Nominal
thread size
PitchCross-recessed
Number
dkkCmq (Cross-Recessed penetration depth)
Reference
dimension
ToleranceReference
dimension
ToleranceApprox.ReferenceMaximumMinimum
M20.4140
-0.4
1.20
-0.2
0.22.21.010.65
M2.30.44.61.350.22.41.210.85
M2.50.4551.450.22.61.421.05
M2.60.455.21.50.22.61.421.05
M30.5260
-0.5
1.750
-0.3
0.253.61.430.91
M3.50.6720.254.11.931.40
M40.782.30.34.52.331.79
M50.8100
-0.6
2.80.35.12.932.38
M61.03120
-0.7
3.40
-0.4
0.46.73.262.70
M81.25160
-0.8
4.40.48.44.964.36
M101.54200
-1.3
5.70
-0.5
0.7105.955.15
M121.75246.70.5106.255.25
Part Number
CSPCSZ-316L-M2-3
CSPCSZ-316L-M2-4
CSPCSZ-316L-M2-5
CSPCSZ-316L-M2-6
CSPCSZ-316L-M2-8
CSPCSZ-316L-M2-10
CSPCSZ-316L-M2.6-4
CSPCSZ-316L-M2.6-5
CSPCSZ-316L-M2.6-6
CSPCSZ-316L-M2.6-8
CSPCSZ-316L-M2.6-10
CSPCSZ-316L-M2.6-12
CSPCSZ-316L-M3-5
CSPCSZ-316L-M3-6
CSPCSZ-316L-M3-8
CSPCSZ-316L-M3-10
CSPCSZ-316L-M3-12
CSPCSZ-316L-M3-14
CSPCSZ-316L-M3-16
CSPCSZ-316L-M3-20
CSPCSZ-316L-M3-25
CSPCSZ-316L-M3-30
CSPCSZ-316L-M3-40
CSPCSZ-316L-M4-6
CSPCSZ-316L-M4-8
CSPCSZ-316L-M4-10
CSPCSZ-316L-M4-12
CSPCSZ-316L-M4-14
CSPCSZ-316L-M4-15
CSPCSZ-316L-M4-16
CSPCSZ-316L-M4-18
CSPCSZ-316L-M4-20
CSPCSZ-316L-M4-25
CSPCSZ-316L-M4-30
CSPCSZ-316L-M4-45
CSPCSZ-316L-M5-8
CSPCSZ-316L-M5-10
CSPCSZ-316L-M5-12
CSPCSZ-316L-M5-14
CSPCSZ-316L-M5-15
CSPCSZ-316L-M5-16
CSPCSZ-316L-M5-18
CSPCSZ-316L-M5-20
CSPCSZ-316L-M5-25
CSPCSZ-316L-M5-30
CSPCSZ-316L-M5-35
CSPCSZ-316L-M5-40
CSPCSZ-316L-M6-8
CSPCSZ-316L-M6-10
CSPCSZ-316L-M6-12
CSPCSZ-316L-M6-14
CSPCSZ-316L-M6-15
CSPCSZ-316L-M6-16
CSPCSZ-316L-M6-20
CSPCSZ-316L-M6-25
CSPCSZ-316L-M6-30
CSPCSZ-316L-M6-35
CSPCSZ-316L-M6-40
CSPCSZ-316L-M6-45
CSPCSZ-316L-M6-50
CSPCSZ-316L-M8-12
CSPCSZ-316L-M8-15
CSPCSZ-316L-M8-16
CSPCSZ-316L-M8-20
CSPCSZ-316L-M8-25
CSPCSZ-316L-M8-30
CSPCSZ-316L-M8-35
CSPCSZ-316L-M8-40
CSPCSZ-316L-M8-45
CSPCSZ-316L-M8-50
CSPCSZ-316L-M10-16
CSPCSZ-316L-M10-20
CSPCSZ-316L-M10-25
CSPCSZ-316L-M10-30
CSPCSZ-316L-M10-35
CSPCSZ-316L-M10-40
CSPCSZ-316L-M10-45
CSPCSZ-316L-M10-50
CSPCSZ-316LD-M8-25
CSPCSZ-316LTBS-M4-45
CSPCSZ-430-M3-4
CSPCSZ-430-M3-5
CSPCSZ-430-M3-8
CSPCSZ-430-M3-12
CSPCSZ-430-M4-6
CSPCSZ-430-M4-10
CSPCSZ-430-M4-12
CSPCSZ-430-M4-20
CSPCSZ-AL-M2-4
CSPCSZ-AL-M2-5
Part NumberStandard Unit PriceNumber of pc(s). included in pkg.Minimum order quantityVolume DiscountDays to ShipRoHSNominal of Thread (M) Length L (mm)
(mm)
Surface Treatment_02 Material Pitch
(mm)
Sales Unit Additional Shape Application Strength Class (Steel) Strength Class (Stainless Steel) Surface Treatment Details

MYR 1,991.34

10,000 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -23[Not Provided] No[Stainless Steel] SUS316L0.4Box/packageStandard--A2-50-

MYR 0.48

1 Piece(s) 5 Day(s) or more 1024[Not Provided] No[Stainless Steel] SUS316L0.4Low Quantity (can be purchased from one)StandardStandard---

MYR 0.47

1 Piece(s) 2 Day(s) or more 1025[Not Provided] No[Stainless Steel] SUS316L0.4Low Quantity (can be purchased from one)StandardStandard---

MYR 0.55

1 Piece(s)Available 5 Day(s) or more 1026[Not Provided] No[Stainless Steel] SUS316L0.4Low Quantity (can be purchased from one)StandardStandard---

MYR 0.50

1 Piece(s)Available 5 Day(s) or more 1028[Not Provided] No[Stainless Steel] SUS316L0.4Low Quantity (can be purchased from one)StandardStandard---

MYR 0.55

1 Piece(s) 1 Day(s) or more 10210[Not Provided] No[Stainless Steel] SUS316L0.4Low Quantity (can be purchased from one)StandardStandard---

MYR 0.60

1 Piece(s)Available 5 Day(s) or more 102.64[Not Provided] No[Stainless Steel] SUS316L0.45Low Quantity (can be purchased from one)StandardStandard---

MYR 0.58

1 Piece(s)Available 5 Day(s) or more 102.65[Not Provided] No[Stainless Steel] SUS316L0.45Low Quantity (can be purchased from one)StandardStandard---

MYR 0.59

1 Piece(s)Available 5 Day(s) or more 102.66[Not Provided] No[Stainless Steel] SUS316L0.45Low Quantity (can be purchased from one)StandardStandard---

MYR 0.61

1 Piece(s)Available 5 Day(s) or more 102.68[Not Provided] No[Stainless Steel] SUS316L0.45Low Quantity (can be purchased from one)StandardStandard---

MYR 0.64

1 Piece(s)Available 5 Day(s) or more 102.610[Not Provided] No[Stainless Steel] SUS316L0.45Low Quantity (can be purchased from one)StandardStandard---

MYR 0.71

1 Piece(s) 5 Day(s) or more 102.612[Not Provided] No[Stainless Steel] SUS316L0.45Low Quantity (can be purchased from one)StandardStandard---

MYR 0.57

1 Piece(s) 5 Day(s) or more 1035[Not Provided] No[Stainless Steel] SUS316L0.5Low Quantity (can be purchased from one)StandardStandard---

MYR 0.57

1 Piece(s)Available 5 Day(s) or more 1036[Not Provided] No[Stainless Steel] SUS316L0.5Low Quantity (can be purchased from one)StandardStandard---

MYR 0.58

1 Piece(s)Available 5 Day(s) or more 1038[Not Provided] No[Stainless Steel] SUS316L0.5Low Quantity (can be purchased from one)StandardStandard---

MYR 0.67

1 Piece(s)Available 5 Day(s) or more 10310[Not Provided] No[Stainless Steel] SUS316L0.5Low Quantity (can be purchased from one)StandardStandard---

MYR 0.78

1 Piece(s)Available 5 Day(s) or more 10312[Not Provided] No[Stainless Steel] SUS316L0.5Low Quantity (can be purchased from one)StandardStandard---

MYR 520.36

2,000 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -314[Not Provided] No[Stainless Steel] SUS316L0.5Box/packageStandard--A2-50-

MYR 0.66

1 Piece(s)Available 5 Day(s) or more 10316[Not Provided] No[Stainless Steel] SUS316L0.5Low Quantity (can be purchased from one)StandardStandard---

MYR 0.70

1 Piece(s)Available 5 Day(s) or more 10320[Not Provided] No[Stainless Steel] SUS316L0.5Low Quantity (can be purchased from one)StandardStandard---

MYR 0.77

1 Piece(s)Available 5 Day(s) or more 10325[Not Provided] No[Stainless Steel] SUS316L0.5Low Quantity (can be purchased from one)StandardStandard---

MYR 0.84

1 Piece(s) 5 Day(s) or more 10330[Not Provided] No[Stainless Steel] SUS316L0.5Low Quantity (can be purchased from one)StandardStandard---

MYR 284.24

500 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -340[Not Provided] No[Stainless Steel] SUS316L0.5Box/packageStandard--A2-50-

MYR 0.73

1 Piece(s) 5 Day(s) or more 1046[Not Provided] No[Stainless Steel] SUS316L0.7Low Quantity (can be purchased from one)StandardStandard---

MYR 0.76

1 Piece(s) 5 Day(s) or more 1048[Not Provided] No[Stainless Steel] SUS316L0.7Low Quantity (can be purchased from one)StandardStandard---

MYR 0.79

1 Piece(s)Available 5 Day(s) or more 10410[Not Provided] No[Stainless Steel] SUS316L0.7Low Quantity (can be purchased from one)StandardStandard---

MYR 0.83

1 Piece(s)Available 5 Day(s) or more 10412[Not Provided] No[Stainless Steel] SUS316L0.7Low Quantity (can be purchased from one)StandardStandard---

MYR 419.36

1,000 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -414[Not Provided] No[Stainless Steel] SUS316L0.7Box/packageStandard--A2-50-

MYR 0.84

1 Piece(s)Available 5 Day(s) or more 10415[Not Provided] No[Stainless Steel] SUS316L0.7Low Quantity (can be purchased from one)StandardStandard---

MYR 0.87

1 Piece(s)Available 5 Day(s) or more 10416[Not Provided] No[Stainless Steel] SUS316L0.7Low Quantity (can be purchased from one)StandardStandard---

MYR 239.58

500 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -418[Not Provided] No[Stainless Steel] SUS316L0.7Box/packageStandard--A2-50-

MYR 0.97

1 Piece(s)Available 5 Day(s) or more 10420[Not Provided] No[Stainless Steel] SUS316L0.7Low Quantity (can be purchased from one)StandardStandard---

MYR 1.07

1 Piece(s)Available 5 Day(s) or more 10425[Not Provided] No[Stainless Steel] SUS316L0.7Low Quantity (can be purchased from one)StandardStandard---

MYR 1.12

1 Piece(s) 5 Day(s) or more 10430[Not Provided] No[Stainless Steel] SUS316L0.7Low Quantity (can be purchased from one)StandardStandard---

MYR 192.49

200 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -445[Not Provided] No[Stainless Steel] SUS316L0.7Box/packageStandard--A2-50-

MYR 1.04

1 Piece(s)Available 5 Day(s) or more 1058[Not Provided] No[Stainless Steel] SUS316L0.8Low Quantity (can be purchased from one)StandardStandard---

MYR 1.04

1 Piece(s)Available 5 Day(s) or more 10510[Not Provided] No[Stainless Steel] SUS316L0.8Low Quantity (can be purchased from one)StandardStandard---

MYR 1.11

1 Piece(s) 5 Day(s) or more 10512[Not Provided] No[Stainless Steel] SUS316L0.8Low Quantity (can be purchased from one)StandardStandard---

MYR 1.22

1 Piece(s) 5 Day(s) or more 10514[Not Provided] No[Stainless Steel] SUS316L0.8Low Quantity (can be purchased from one)StandardStandard---

MYR 1.22

1 Piece(s)Available 5 Day(s) or more 10515[Not Provided] No[Stainless Steel] SUS316L0.8Low Quantity (can be purchased from one)StandardStandard---

MYR 1.23

1 Piece(s)Available 5 Day(s) or more 10516[Not Provided] No[Stainless Steel] SUS316L0.8Low Quantity (can be purchased from one)StandardStandard---

MYR 1.35

1 Piece(s)Available 5 Day(s) or more 10518[Not Provided] No[Stainless Steel] SUS316L0.8Low Quantity (can be purchased from one)StandardStandard---

MYR 1.35

1 Piece(s)Available 5 Day(s) or more 10520[Not Provided] No[Stainless Steel] SUS316L0.8Low Quantity (can be purchased from one)StandardStandard---

MYR 1.57

1 Piece(s)Available 5 Day(s) or more 10525[Not Provided] No[Stainless Steel] SUS316L0.8Low Quantity (can be purchased from one)StandardStandard---

MYR 1.73

1 Piece(s)Available 5 Day(s) or more 10530[Not Provided] No[Stainless Steel] SUS316L0.8Low Quantity (can be purchased from one)StandardStandard---

MYR 5.05

1 Piece(s)Available 5 Day(s) or more 10535[Not Provided] No[Stainless Steel] SUS316L0.8Low Quantity (can be purchased from one)StandardStandard---

MYR 5.76

1 Piece(s)Available 5 Day(s) or more 10540[Not Provided] No[Stainless Steel] SUS316L0.8Low Quantity (can be purchased from one)StandardStandard---

MYR 1.57

1 Piece(s)Available 5 Day(s) or more 1068[Not Provided] No[Stainless Steel] SUS316L1Low Quantity (can be purchased from one)StandardStandard---

MYR 1.63

1 Piece(s) 5 Day(s) or more 10610[Not Provided] No[Stainless Steel] SUS316L1Low Quantity (can be purchased from one)StandardStandard---

MYR 1.73

1 Piece(s)Available 5 Day(s) or more 10612[Not Provided] No[Stainless Steel] SUS316L1Low Quantity (can be purchased from one)StandardStandard---

MYR 1.90

1 Piece(s)Available 5 Day(s) or more 10614[Not Provided] No[Stainless Steel] SUS316L1Low Quantity (can be purchased from one)StandardStandard---

MYR 1.90

1 Piece(s)Available 5 Day(s) or more 10615[Not Provided] No[Stainless Steel] SUS316L1Low Quantity (can be purchased from one)StandardStandard---

MYR 1.96

1 Piece(s)Available 5 Day(s) or more 10616[Not Provided] No[Stainless Steel] SUS316L1Low Quantity (can be purchased from one)StandardStandard---

MYR 2.18

1 Piece(s)Available 5 Day(s) or more 10620[Not Provided] No[Stainless Steel] SUS316L1Low Quantity (can be purchased from one)StandardStandard---

MYR 2.47

1 Piece(s)Available 5 Day(s) or more 10625[Not Provided] No[Stainless Steel] SUS316L1Low Quantity (can be purchased from one)StandardStandard---

MYR 2.81

1 Piece(s)Available 5 Day(s) or more 10630[Not Provided] No[Stainless Steel] SUS316L1Low Quantity (can be purchased from one)StandardStandard---

MYR 3.14

1 Piece(s)Available 5 Day(s) or more 10635[Not Provided] No[Stainless Steel] SUS316L1Low Quantity (can be purchased from one)StandardStandard---

MYR 193.72

100 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -640[Not Provided] No[Stainless Steel] SUS316L1Box/packageStandard--A2-50-

MYR 231.38

100 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -645[Not Provided] No[Stainless Steel] SUS316L1Box/packageStandard--A2-50-

MYR 4.72

1 Piece(s)Available 5 Day(s) or more 10650[Not Provided] No[Stainless Steel] SUS316L1Low Quantity (can be purchased from one)StandardStandard---

MYR 4.26

1 Piece(s)Available 5 Day(s) or more 10812[Not Provided] No[Stainless Steel] SUS316L1.25Low Quantity (can be purchased from one)StandardStandard---

MYR 4.48

1 Piece(s) 5 Day(s) or more 10815[Not Provided] No[Stainless Steel] SUS316L1.25Low Quantity (can be purchased from one)StandardStandard---

MYR 4.54

1 Piece(s)Available 5 Day(s) or more 10816[Not Provided] No[Stainless Steel] SUS316L1.25Low Quantity (can be purchased from one)StandardStandard---

MYR 4.99

1 Piece(s)Available 5 Day(s) or more 10820[Not Provided] No[Stainless Steel] SUS316L1.25Low Quantity (can be purchased from one)StandardStandard---

MYR 5.66

1 Piece(s)Available 5 Day(s) or more 10825[Not Provided] No[Stainless Steel] SUS316L1.25Low Quantity (can be purchased from one)StandardStandard---

MYR 6.12

1 Piece(s)Available 5 Day(s) or more 10830[Not Provided] No[Stainless Steel] SUS316L1.25Low Quantity (can be purchased from one)StandardStandard---

MYR 6.80

1 Piece(s)Available 5 Day(s) or more 10835[Not Provided] No[Stainless Steel] SUS316L1.25Low Quantity (can be purchased from one)StandardStandard---

MYR 10.50

1 Piece(s)Available 5 Day(s) or more 10840[Not Provided] No[Stainless Steel] SUS316L1.25Low Quantity (can be purchased from one)StandardStandard---

MYR 8.53

1 Piece(s)Available 5 Day(s) or more 10845[Not Provided] No[Stainless Steel] SUS316L1.25Low Quantity (can be purchased from one)StandardStandard---

MYR 10.05

1 Piece(s)Available 5 Day(s) or more 10850[Not Provided] No[Stainless Steel] SUS316L1.25Low Quantity (can be purchased from one)StandardStandard---

MYR 418.65

100 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -1016[Not Provided] No[Stainless Steel] SUS316L1.5Box/packageStandard--A2-50-

MYR 459.82

100 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -1020[Not Provided] No[Stainless Steel] SUS316L1.5Box/packageStandard--A2-50-

MYR 490.19

100 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -1025[Not Provided] No[Stainless Steel] SUS316L1.5Box/packageStandard--A2-50-

MYR 543.79

100 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -1030[Not Provided] No[Stainless Steel] SUS316L1.5Box/packageStandard--A2-50-

MYR 302.12

50 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -1035[Not Provided] No[Stainless Steel] SUS316L1.5Box/packageStandard--A2-50-

MYR 328.21

50 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -1040[Not Provided] No[Stainless Steel] SUS316L1.5Box/packageStandard--A2-50-

MYR 353.55

50 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -1045[Not Provided] No[Stainless Steel] SUS316L1.5Box/packageStandard--A2-50-

MYR 383.22

50 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -1050[Not Provided] No[Stainless Steel] SUS316L1.5Box/packageStandard--A2-50-

MYR 331.52

100 Pieces Per Package

1 Pack(s)Available 5 Day(s) or more -825Dacromet[Stainless Steel] SUS316L1.25Box/packageStandardStandard---

MYR 247.54

200 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -445[Black Painted] Black Paint[Stainless Steel] SUS316L0.7Box/packageStandard--A2-50-

MYR 0.45

1 Piece(s) 5 Day(s) or more 1034[Not Provided] No[Stainless Steel] SUS4300.5Low Quantity (can be purchased from one)StandardStandard---

MYR 0.27

1 Piece(s)Available 5 Day(s) or more 1035[Not Provided] No[Stainless Steel] SUS4300.5Low Quantity (can be purchased from one)StandardStandard---

MYR 0.40

1 Piece(s)Available 5 Day(s) or more 1038[Not Provided] No[Stainless Steel] SUS4300.5Low Quantity (can be purchased from one)StandardStandard---

MYR 0.39

1 Piece(s)Available 5 Day(s) or more 10312[Not Provided] No[Stainless Steel] SUS4300.5Low Quantity (can be purchased from one)StandardStandard---

MYR 0.41

1 Piece(s)Available 5 Day(s) or more 1046[Not Provided] No[Stainless Steel] SUS4300.7Low Quantity (can be purchased from one)StandardStandard---

MYR 0.44

1 Piece(s)Available 5 Day(s) or more 10410[Not Provided] No[Stainless Steel] SUS4300.7Low Quantity (can be purchased from one)StandardStandard---

MYR 0.44

1 Piece(s)Available 5 Day(s) or more 10412[Not Provided] No[Stainless Steel] SUS4300.7Low Quantity (can be purchased from one)StandardStandard---

MYR 123.33

500 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -420[Not Provided] No[Stainless Steel] SUS4300.7Box/packageStandard--A2-50-

MYR 860.33

3,000 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -24[Not Provided] No[Aluminum] Aluminum0.4Box/packageStandard----

MYR 898.66

3,000 Pieces Per Package

1 Pack(s)Available 10 Day(s) or more -25[Not Provided] No[Aluminum] Aluminum0.4Box/packageStandard----

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Basic Information

Mounting Hole Shape Phillips Detailed Shape Disc Thread Type Metric coarse
Basic Shape Standard (Round) Tip Shape Flat End Screw Type Complete thread

Frequently asked question (FAQ)

Question: What is Phillips flat head screw?
Answer: It features a low-profile and countersunk head. They are ideal for applications requiring a strong fastener with a flush mount. They are often used in projects that require moving parts to pass over a fastened area. Because of their ability to mount flush with the surface, they are less apt to snag objects moving overhead.
Question: What is ZEC Coat?
Answer: It is an environmentally friendly, chrome-free metal surface treatment agent. This coating is primarily applied to zinc and zinc alloy plating, providing high anti-corrosion and rust-prevention properties. By using it as a top coat over trivalent chromate plating, it further enhances corrosion resistance.
Question: What is Loosen prevent agent(A-LOCK)?
Answer: A-LOCK processing is a specialized technique designed to prevent screws from loosening. it achieves this by firmly bonding a special nylon resin called Nylon 11 to the thread surface of bolts, which creates a high friction force between the bolt and the nut. This friction effectively reduces loosening caused by vibration and shocks.

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