Hex Head Self-Drilling Screws with PVC Washer

hex-head-self-drilling-screw-pvc-washer-metal-roofing.jpg

ASME IFI and Metric standard Size

Diameter	Length
#6-20(ST3.5)	1/2''-2''inch (13-50mm)
#8-18(ST4.2)	1/2''-2''inch (13-50mm)
#10-16(ST4.8)	1/2''-4''inch(13-100mm)
#12-14(ST5.5)	1/2''-6''inch(13-150mm)
#14-14(ST6.3)	1/2''-6''inch(13-150mm)

Hex head self drilling screws with PVC washer are designed for secure fastening and reliable waterproof performance in metal roofing and steel-to-steel applications.
The integrated PVC washer creates a tight sealing effect, preventing water penetration while maintaining long-term durability under harsh weather conditions.

Compared with ordinary self drilling screws, this type combines drilling, tapping, and fastening in one operation, significantly improving installation efficiency and reducing labor cost.
It is widely used in roofing systems, steel structures, sandwich panels, and industrial construction projects.

Technical Options

Material: Carbon steel / Stainless steel

Head type: Hex head

Washer type: PVC bonded washer

Drill point: TEK #1–#5

Surface finish: Zinc plated, Ruspert, Dacromet, painted

Sizes: Customized available

Applications

Metal roofing sheets

Steel structure connections

Sandwich panel installation

Industrial buildings

Prefabricated construction

Solar mounting systems

Features

Hex head design for high torque installation

Self drilling point for fast penetration

PVC washer for waterproof sealing

High-strength carbon steel or stainless steel

Multiple surface coatings for corrosion resistance

Suitable for outdoor and heavy-duty applications

PVC Washer vs. EPDM Washer – Which is Better?

When choosing roofing screws, the type of washer plays a key role in cost, sealing performance, and durability. Here's a quick comparison:

Feature	PVC Washer Screws	EPDM Washer Screws
Price	Cheaper&more budget friendly	Bit more expensive
Durability	Good for standard application	Superior water tight seal
Flexibility	Rigid,Less flexible	Flexible,absorbs movement &vibration
Waterproofing	Provide basic sealing	Superior water tight seal
Best For	Cost-sensitive projects,general roofing,light construction	Premium roofing,outdoor projects,long term weather exposure

Conclusion

PVC Washer Screws are the best choice for customers looking for a cheaper alternative without compromising fastening strength.
EPDM Washer Screws are recommended for projects that demand long-lasting waterproof performance in harsh outdoor environments.

Material	Carbon C1022 Steel, Case Harden&Stainless Steel
Head Type	hex washer head
Thread Type	full thread, BSD
Surface Finish	Black/grey phosphate, White/yellow zinc plated, Nickel, Ruspert.
Diameter	#8 (4.2mm), #10 (4.8mm), #12 (5.5mm), #14 (6.3mm)
Point	Drilling Tail
Non-standard	OEM is available if you provide drawings or samples.
Packing	box, bulk in carton or bags ,polybag or Customer request