Hex Washer Head Self Drilling Screws
410 Stainless Steel Hex Washer Head Self Drilling Screws with Optional PVC Washers
Hex Washer Head Self Drilling Screws combine an external hex drive, integrated washer-style head, tapping thread and self-drilling point for one-step fastening of suitable metal assemblies. VALTOR primarily supplies hardened 410 stainless steel, with 304 and 316 stainless options for compatible corrosion-resistant applications. PVC washers can be supplied for cushioning, isolation or surface protection.
Product Overview
The integrated drill point creates the initial hole in suitable metal. After the point passes through the material stack, the tapping thread enters the opening and develops engagement before the head seats. This DRILL → THREAD → CLAMP sequence can reduce separate pre-drilling operations where the substrate and screw configuration are compatible.
410 stainless steel is VALTOR’s primary material because it can be hardened for drill-point and thread-forming performance while retaining stainless characteristics. 304 and 316 offer higher corrosion resistance, but their drilling performance must be selected for the screw design, point, substrate grade, hardness, thickness and manufacturing method; they are not automatically equivalent to hardened 410.
Optional PVC washers add a cushioning, isolation or surface-protection layer beneath the head. Procurement should define diameter, length, drill-point geometry, total drilling thickness, base material, stainless grade, PVC washer requirement, finish and quantity. A PVC washer does not automatically provide waterproof or roofing-grade sealing.
Technical Specifications
Drill Point, Drilling Capacity & Material Stack Selection
Stainless Steel & PVC Washer Options
Size, Drill Point & OEM Manufacturing
Common ST2.9–ST6.3 diameters and 9.5–50 mm commercial lengths; extended supply to approximately 100 mm depends on diameter, point, thread length, stainless grade and washer configuration. Not every diameter is available in every length.
Point length, flute, cutting edge, point diameter and thread length are matched to the material stack and required engagement. No universal drilling-thickness value applies.
Feasible customization includes diameter, length, point geometry, thread length, head dimensions, PVC washer diameter and thickness, stainless grade, finish, marking and packaging.
Provide standard or drawing, diameter, length, substrate grade and hardness, layer thicknesses, total drilling thickness, material, washer requirement, corrosion environment, quantity and packaging.
Inner bags, boxes, export cartons, pallets, customer labels, part numbers and authorized private-label packaging may be supported.
Functional Testing, Quality & Documentation
Inspection can cover material grade, thread diameter, pitch and profile, point length, cutting edges and flute formation, hex width, head height, flange diameter, concentricity, PVC washer material and dimensions. Drilling, thread-forming and seating tests may be performed on defined test material when specified. ISO 10666 may be referenced for applicable mechanical and functional evaluation, but compliance is claimed only for products actually produced and tested to the stated requirement. Available documentation may include MTC, raw-material, dimensional, inspection and performed test reports.
Applications
One-step drilling, thread formation and clamping for compatible industrial metal assemblies.
Direct fastening of compatible overlapping metal sheets.
Bracket and profile connections matched to drilling thickness.
Equipment covers and fabricated panels requiring external-hex installation.
Compatible ducts, housings and supporting sheet-metal components.
Drawing-based industrial assemblies with selected point, material and PVC washer.
Frequently Asked Questions
Why is 410 stainless steel used for self drilling screws?
410 can be hardened to support drill-point hardness, thread-forming performance and wear resistance, making it VALTOR’s primary material for this product family.
Can 304 or 316 stainless self drilling screws drill steel?
They may be suitable in selected designs, but capability must be confirmed for the actual point, substrate grade, hardness and total thickness. They are not automatically equivalent to hardened 410.
What is the relationship between DIN 7504 K and ISO 15480?
DIN 7504 K is a widely recognized legacy purchasing designation, while ISO 15480 is the relevant current ISO standard for applicable hexagon washer head drilling screws. Confirm dimensions and edition for exact procurement.
What is a PVC washer used for?
It can add cushioning, isolation, reduced metal-to-metal contact or surface protection. It does not automatically guarantee waterproof performance.
What information is required for quotation?
Provide standard or drawing, ST size, length, drill point, substrate and hardness, layer and total thickness, 410/304/316 grade, PVC washer requirement, finish, quantity and packaging.
Related Products
Share the standard or drawing, ST size, length, drill point, material stack, stainless grade, PVC washer requirement, finish, quantity and packaging with VALTOR.