304/316 Stainless Steel Wafer/Truss head type 17 heavy duty wood screw
Stainless steel 304 and 316
StainGrip® 304 & 316 Stainless Steel Wafer/Truss Head Type 17 Heavy-Duty Wood Screws are structural timber fasteners engineered for maximum surface clamping force, high load capacity, and exceptional joint pull-down in heavy timber framing, pergolas, log construction, deck substructures, and outdoor joinery. Manufactured from premium SS304 and marine-grade SS316 stainless steel, these screws deliver ultimate protection against rust, severe outdoor weathering, and harsh chemical wood preservatives while eliminating the need for separate washers.
Key Features & Technical Benefits
Premium SS304 & SS316 Stainless Steel (Ultimate Corrosion Protection): High nickel and chromium alloy formulation (with added molybdenum in SS316) provides superior resistance against rust, outdoor weathering, coastal salt spray, and aggressive chemicals in ACQ pressure-treated lumber.
Ultra-Wide Wafer / Truss Head (Eliminates Washers & Maximum Clamping): The broad, low-profile flange head spreads high clamping loads across a large surface area, preventing head pull-through in softwoods and heavy timber without requiring extra flat washers.
Type 17 Auger Point (Fast Bite & Split Prevention): Precision-engineered notched Type 17 point cuts directly through dense timber fibers, enabling rapid thread engagement and preventing wood splitting without requiring pre-drilling under standard conditions.
Partial Thread Shank (Anti-Jacking Joint Tightness): The unthreaded upper shank allows the top timber board to slide freely and pull completely tight against the underlying structural member, eliminating board jacking and joint gaps.
Deep Torx Drive System (Optimal Torque Transfer): Precision-molded star drive recess delivers maximum driver bit engagement and high torque transmission, completely eliminating bit cam-out, driver slippage, and stripped screw heads during heavy-duty driving.
Technical Specifications
Feature | Specification |
Material Grade | SS304 / SS316 Marine Grade Stainless Steel |
Head Style | Wafer / Truss Flange Head (Integrated Washer) |
Drive System | Torx Drive (Star Drive) |
Shank Type | Partial Thread / Half Thread |
Point Type | Type 17 Auger Point |
Application | Heavy Timber Framing, Pergolas, Outdoor Structural Wood & Substructures |
Stainless Steel Grades:
o 304 / 18-8 Stainless Steel: Excellent corrosion resistance, ideal for general applications.
o 305 Stainless Steel: High nickel content, non-magnetic, ideal for cold forming and deep drawing.
o 316 Stainless Steel: Marine-grade, superior resistance to salt water and chemicals.
Applicable Standards:
o Dimensional: ASME B18.6.3 / ASME B18.2.1 / ANSI
o Material / Physical: ASTM F593 (Group 1: 304/305, Group 2: 316) / ASTM A240
Certifications: MTR (Material Test Report) / Mill Certs available upon request.
Fast Dispatch for Stocked Items: Ready-to-ship inventory available for quick order dispatch.
Factory-Direct Bulk Production: Competitive direct-from-factory lead times for wholesale and custom orders.
Flexible International Shipping: Comprehensive shipping options including FOB, CIF, and DDP (Door-to-Door with duties paid).
Tracking & Logistics: Full shipment tracking provided from factory loading to final delivery.
We offer full OEM/ODM manufacturing to meet your specific application needs.
Head Marking & Design: Custom head logo, drive type, and head shape.
Dimensions & Tolerances: Custom sizes according to ASME standards or customer drawings.
Head Painting & Coating: Head color matching, passivation, and specialty finishes.
Private Label Packaging: Custom inner/outer box design, polybags, and barcode labeling.
Samples: Custom samples and initial inspection reports available before full production.
Flexible custom packaging solutions available for both wholesale and retail markets:
Multiple Packaging Options: From small polybags and small inner boxes to industrial bulk packing.
Custom Printing & Logo: Custom box design, printed logos, and brand artwork.
Labeling & Barcodes: Private labels, UPC/EAN barcodes, part numbers, and shipping marks.
