Cross recessed countersunk head tapping screws

  • Brand:

    T,TGR,XDM,OEM as requirement
  • Brief:

    Phillip CSK roofing screw
  • Surface:

    Polishing; Anodize; Nickel, Zinc, Black,Tin, chrome,Silver plating ,Heat treatment: Point hardening,quenching hardening
  • Material:

    Stainless steel 304,316,316L,410,Duplex2205,2507,Carbon steel 4.8/8.8/10.9/12.9grade
  • Size:

    ST2.9-ST6.3
  • MOQ:

    Feel free to contact us for further inquiry.
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product details

GB/T 846,DIN7982,ISO7050-1983,ANSI/ASEM B 18.6.3,available for ISO ROHS,SGS
Self-tapping screws drill their own holes when they’re screwed into materials such as wood, plastic and metal. By using a screwdriver to attach a self-tapping screw, you can create precisely fitted threads. They're ideal for combining two different types of materials or for screwing in areas where access is only one-sided. It’s helpful to use self-tapping screws for products that need to be maintained regularly, such as air-conditioning units or canopies, where you need to dissemble and reassemble the item along the same threads.

Screw Thread d ST2.2 ST2.9 ST3.5 (ST3.9) ST4.2 ST4.8 ST5.5 ST6.3
P Pitch 0.8 1.1 1.3 1.3 1.4 1.6 1.8 1.8
a 0.8 1.1 1.3 1.3 1.4 1.6 1.8 1.8
dk max=nominal size 4.3 5.5 6.8 7.5 8.1 9.5 10.8 12.4
min 4 5.2 6.44 7.14 7.74 9.14 10.37 11.97
k 1.3 1.7 2.1 2.3 2.5 3 3.4 3.8
y max Type C 2 2.6 3.2 3.5 3.7 4.3 5 6
Type F 1.6 2.1 2.5 2.7 2.8 3.2 3.6 3.6
Socket No. 1 1 2 2 2 2 3 3
M1 2.5 3 4.2 4.6 4.7 5.1 6.8 7.1
M2 2.4 2.8 4 4.2 4.4 5 6.3 7