Self-Tapping Screws M5.5 – Hex Washer Head – 30mm, 40mm, 50mm – Box of 560
M5.5 hex washer head self-tapping screws for metal roofing, siding, metal buildings, and general sheet metal fastening. 560 screws per box in your choice of 30mm, 40mm, or 50mm length. Ships to your door.
Product Details
Thread diameter: M5.5
Lengths: 30mm, 40mm, 50mm
Head type: Hex washer head
Drive: 5/16 in hex
Point: Self-tapping (no pre-drilling required in sheet metal)
Quantity: 560 screws per box
Box weight: Approx. 7 lbs
Condition: New
Common Uses
Metal roofing and siding panel fastening
Steel building and metal structure assembly
Sheet metal fabrication and repairs
General metal-to-metal and metal-to-wood fastening
Choosing the Right Length
30mm: Suitable for thin sheet metal-to-metal or metal-to-light substrate applications.
40mm: General-purpose length for most metal roofing and siding panel-to-purlin installations.
50mm: Better penetration for thicker substrates or where extra holding strength is needed.
Installation Notes
Use a 5/16 in hex driver.
Drive at consistent speed — avoid overtightening which can strip the thread or damage the washer.
For roofing applications, these are general-purpose fasteners. If a color-matched or EPDM-sealed screw is needed, see our #12 TEK roofing screws.
Ships to your door. Shipping calculated at checkout.
