Slotted Head, Serrated Hex Washer Head Self Drilling Screws

Strong Johnny offers different features to fit your application, all of our self-drilling screws will be examined with the penetration test.

With our current capacity, the longest length can be up to 400mm and we also make the #5 tek point.

-different color head paints (refer to RAL code)

-EPDM bonded washer

-customized head marks

-per DIN 7504 K standard

The head painted hex washer head screw is commonly used on roofing and cladding, they are also called " farmer screw".

And sometimes they come with a sharp point(stitching screw), to be used on the metal sheet.

We have this selection made of C1022 carbon steel and stainless steel material, SS 410 is also available.


Cladding Screw (SJ-30037)	Sandwich Panel Screw (SJ-30038)


Hex Washer Head (SJ-30039)	Stainless Steel 410 Screw (SJ-30040)


Hex Washer Head Stitching Screw (SJ-30041)	Colored Anodized Hex Washer Screw (SJ-30042)

Material	Carbon steel/Stainless steel/bi-metal
Head Type	Hex Washer Head, Pan Head, Flat Head, Truss Head, Pan framing Head or as customers’ requirements
Standard	DIN 7504 K/P/N ANSI, JIS, IFI, NON-STANDARD
Drive	Torx, Phillips, Slotted, Pozi or as per the customer’s requirement
Size	M3~M10
Variety	Roofing screw/farmer screw/sandwich panel screw/solar screw/cladding screw
Surface Treatment	Steel：Zinc (White, Blue, Yellow, Black), Ruspert Stainless steel：Passivated

Hex Washer Head Self Drilling Screws

Hex Washer Head Self Drilling Screws (SJ-3002)