410 Stainless Steel Hex Washer Head Self Drilling Screw
Specification
410 Stainless Steel Hex Washer Head Self Drilling Screws
Combine drilling and fastening in one installation sequence. PO JUN offers 410 stainless steel hex washer head self drilling screws in #8, #10, and #12 sizes, with lengths from 1/2" to 6" depending on diameter.
The drill point forms the initial hole in compatible material, followed by the threads that engage the receiving component. Within the screw’s confirmed drilling range, this can remove a separate pre-drilling step from panel and hardware assembly.
An external hex drive provides socket access, while the integral washer head offers a broader bearing surface than a head without a flange. Additional washers are available across the listed sizes to suit different joint requirements.
Built Around Panel and Hardware Assembly
Drill and Fasten with the Same Screw
The fluted drill point distinguishes this product from a sharp-point tapping screw. It is intended to drill through suitable material before the threads engage, helping simplify repetitive fastening work when the point and substrate are correctly matched.
Hex Drive for Powered Installation
The external hex head accepts a matching nut driver or socket. It suits fastening positions where there is clearance above the head for powered tooling, such as equipment panels, brackets, and sheet-metal assemblies.
Integral Washer Head and Optional Washers
The built-in flange provides a bearing surface against the component. Where the assembly needs an additional washer, include its dimensions and intended function with the order inquiry.
For weather-exposed joints, a sealing washer must be selected and tested as part of the complete connection. A metal washer or washer-shaped head alone does not make the fastening point waterproof.
410 Stainless Steel Hex Washer Head Self Drilling Screw Specifications
Available Sizes
All dimensions below are in inches.
| Thread Diameter | Available Lengths |
|---|---|
| #8 | 1/2", 5/8", 3/4", 1" |
| #10 | 1/2", 5/8", 3/4", 1", 1-1/4", 1-1/2" |
| #12 | 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 3-1/2", 4", 5", 6" |
Washer option: Additional washers can be requested for all listed sizes. Confirm the washer type, material, and dimensions when ordering.
Screw length and drilling capacity are different specifications. Select the length around the complete assembly, then confirm that the drill point is suitable for the material it must penetrate.
Match the Screw to the Material
These screws can be evaluated for equipment covers, ventilation components, mounting brackets, and metal panel-to-support connections. The receiving material, thickness, and joint design determine the appropriate size and drill point.
For a panel attached to a metal support, provide the thickness of both components and identify any gap between them. For multi-layer assemblies, a cross-section or simple sketch helps clarify which layers the screw must drill and where the threads need to engage.
A longer screw is not automatically suitable for thicker steel. Drill-point geometry, finished screw hardness, substrate hardness, and installation conditions all influence drilling performance.
410 Stainless Steel for Drilling Fasteners
410 is a hardenable stainless steel used in fasteners where hardness is important to drilling and thread engagement. The finished screw’s performance depends on its material condition and manufacturing process—not the grade name alone.
If the assembly will be exposed to salt, persistent moisture, or cleaning chemicals, include those conditions in the inquiry. Material and surface requirements should be reviewed alongside drilling performance, particularly for outdoor equipment and exposed fastening points.
Request a Quote from PO JUN
Send your screw size, quantity, panel and support materials, and their thicknesses. Let PO JUN know whether you need an additional washer, and attach a drawing or existing sample reference if available.
For production purchasing, include your destination country and requested delivery date. Packaging, labeling, and inspection-document requirements can be reviewed with the same inquiry.
Share your size list and assembly details to discuss the screw and washer configuration for your next order.
Frequently Asked Questions
Can these screws drill into stainless steel sheet?
Do not assume compatibility because the screw itself is stainless steel. Stainless sheet grade, hardness, thickness, and the screw’s drill-point design must be reviewed, with suitability confirmed through application testing.
Is a separate washer included as standard?
The integral washer head is part of the screw. An additional washer is an option and should be specified in the quotation and order.
How should installation speed and torque be selected?
Use settings appropriate to the selected screw and receiving material. Excessive speed can affect drilling performance, while excessive tightening can strip the formed thread or damage a washer. Confirm settings through the product guidance and an assembly trial.
Can I replace a sharp-point tapping screw with a self-drilling screw?
Not solely by matching diameter and length. Compare the thread form, drill-point length, available clearance behind the joint, and the original hole arrangement before making the change.