Product Classification & Terminology
| Term | Definition |
|---|---|
| Self-Tapping Screw | A fastener that forms or cuts its own mating threads as it is driven into a pre-drilled or unpiloted substrate. No pre-tapped hole required. |
| Deck Screw | A self-tapping screw specifically engineered for exterior decking applications. Features corrosion-resistant stainless steel construction, deep threads for wood/composite grip, and often a bugle head for flush seating. |
| Extended-Length Wood Screw | A self-tapping screw with overall length exceeding 75 mm (3 inches), designed for through-fastening of thick timbers, laminated beams, multi-layer decking, or structural wood assemblies. |
Key Functional Characteristics
| Feature | Benefit |
|---|---|
| Self-Tapping Thread Geometry | Sharp, deep threads with optimized flank angles enable rapid engagement in wood, composite, and soft metals without pre-drilling (in many applications). |
| Stainless Steel Construction | A2 (304) provides general corrosion resistance for most exterior applications; A4 (316) delivers enhanced protection for marine, coastal, and chemically treated environments. |
| Extended Length Availability | Lengths from 75 mm to 300 mm (3″ to 12″) accommodate thick material stacks, structural connections, and deep embedment requirements. |
| Corrosion Resistance | Passivated surface finish creates a passive chromium oxide layer; no plating degradation or rust bleed on exposed surfaces. |
| Custom Head & Drive Options | Tailored geometry for specific installation tools, aesthetic requirements, and seating flushness. |
Custom Head Styles
| Head Type | Description | Typical Application |
|---|---|---|
| Bugle Head | Countersunk with curved profile; seats flush without countersinking | Decking, flooring, exterior sheathing |
| Flat Head (82° or 100°) | Fully countersunk; sits flush or below surface | Trim work, finished surfaces |
| Pan Head | Rounded top with flat bearing surface | Metal-to-wood, sheet metal attachment |
| Truss Head | Low-profile, wide bearing surface | Soft materials, plastic, composite |
| Hex Flange Head | Hex drive with integral washer flange | High-torque applications, structural connections |
| Modified Truss | Extra-wide bearing surface | Composite decking, thin-gauge materials |
Custom Drive Types
| Drive Type | Advantages | Tool Compatibility |
|---|---|---|
| Phillips | Common availability; suitable for general applications | Standard Phillips #1, #2, #3 |
| Square (Robertson) | Reduced cam-out; positive engagement | Square drive bits |
| Torx (Star) | Superior torque transmission; minimal cam-out | T10 – T40 bits |
| Hex Socket (Allen) | High torque capacity; tamper-resistant option | Hex keys, power tool bits |
| Slotted | Simple; field-serviceable with common tools | Standard flat blade |
Thread Types
| Thread Type | Description | Substrate Suitability |
|---|---|---|
| Coarse Thread | Wide thread spacing; deep thread depth | Wood, soft composites, plastic |
| Fine Thread | Closer thread spacing; shallow depth | Metal, hardwoods, high-density composites |
| Dual-Lead Thread | Two thread starts; faster installation | High-volume production, automated driving |
| Type 17 Point | Notched tip with cutting flute | Wood; reduces splitting; eliminates pre-drilling in many applications |
Extended Length Range
| Length Segment | Typical Applications |
|---|---|
| 75 – 100 mm (3″ – 4″) | Standard decking, single-layer wood attachment |
| 100 – 150 mm (4″ – 6″) | Multi-layer decking, railing attachment, ledger boards |
| 150 – 200 mm (6″ – 8″) | Structural connections, timber framing, beam attachment |
| 200 – 300 mm (8″ – 12″) | Heavy timber construction, laminated beams, through-fastening |
| Parameter | #8 x 3″ (75 mm) | #10 x 4″ (100 mm) | #10 x 6″ (150 mm) | #12 x 8″ (200 mm) |
|---|---|---|---|---|
| Nominal Diameter | 4.2 mm (#8) | 4.8 mm (#10) | 4.8 mm (#10) | 5.5 mm (#12) |
| Overall Length | 75 mm (3″) | 100 mm (4″) | 150 mm (6″) | 200 mm (8″) |
| Thread Length | Full-thread or partial | Full-thread or partial | Partial (50–75 mm) | Partial (60–80 mm) |
| Head Type Options | Bugle, flat, pan, truss, hex flange | Bugle, flat, pan, truss, hex flange | Bugle, flat, truss, hex flange | Flat, truss, hex flange |
| Drive Type Options | Phillips, square, Torx, hex | Phillips, square, Torx, hex | Square, Torx, hex | Square, Torx, hex |
| Point Type | Type 17 (notched) or sharp point | Type 17 or sharp point | Type 17 or sharp point | Type 17 |
| Tensile Strength (A2) | 500–700 MPa | 500–700 MPa | 500–700 MPa | 500–700 MPa |
| Hardness (A2) | 80–95 HRB | 80–95 HRB | 80–95 HRB | 80–95 HRB |
| Corrosion Resistance | 500+ hrs salt spray | 500+ hrs salt spray | 500+ hrs salt spray | 500+ hrs salt spray |
| Parameter | A2 Stainless (304) | A4 Stainless (316) |
|---|---|---|
| Material Composition | 18% Cr, 8% Ni | 16% Cr, 10% Ni, 2% Mo |
| Tensile Strength (MPa) | 500 – 700 | 500 – 700 |
| Proof Stress (MPa) | 210 – 450 | 210 – 450 |
| Hardness (HRB) | 80 – 95 | 80 – 95 |
| Salt Spray Resistance (ASTM B117) | 500 – 1,000 hours | 1,000 – 2,000 hours |
| Chloride Resistance | Moderate | Excellent |
| Staining Potential | Low; may show minor surface rust in severe coastal | Minimal; preferred for marine environments |
| Operating Temperature | -40°C to +300°C | -40°C to +400°C |
| Magnetic Properties | Non-magnetic (slightly magnetic after cold working) | Non-magnetic |
| Typical Applications | Decking, fencing, outdoor furniture | Marine decking, dock construction, coastal structures, chemical exposure |
| Industry | Application | Material & Length Considerations |
|---|---|---|
| Residential & Commercial Decking | Wood and composite deck boards to joists; railing systems; stair stringers | A2 (304) standard; bugle head; Torx/square drive; Type 17 point; lengths 75–150 mm |
| Marine & Coastal Construction | Dock decking; boat lifts; seawalls; pier structures | A4 (316) required; hex flange or bugle head; extended lengths 100–200 mm |
| Timber Framing & Heavy Construction | Glulam beams; laminated timber; structural connections | A2 or A4; hex flange head; extended lengths 150–300 mm; partial thread for clamp load |
| Fencing & Outdoor Structures | Wood fencing; pergolas; gazebos; playground equipment | A2 (304); pan or bugle head; lengths 50–150 mm |
| Composite & PVC Materials | Composite decking; PVC trim; cellular PVC profiles | A2 (304) or A4 (316); modified truss head; coarse thread; Type 17 point |
| Parameter | Options |
|---|---|
| Length | 25 mm – 300 mm (1″ – 12″); custom increments |
| Diameter | #6, #7, #8, #10, #12, 1/4″, M3 – M8 |
| Head Style | Bugle, flat (82°/100°), pan, truss, modified truss, hex flange, oval, round |
| Drive Type | Phillips, Pozidriv, square (Robertson), Torx (star), hex socket, slotted, combination |
| Thread Type | Coarse, fine, dual-lead, high-low (for plastic), thread-forming (for metal) |
| Point Type | Sharp point, Type 17 (notched), drill point (self-drilling), blunt |
| Material | A2 (304) stainless, A4 (316) stainless, carbon steel (with plating) |
| Finish | Passivated (standard), electro-polished, black oxide, coated (PTFE, Xylan) |
| Thread Length | Full-thread, partial-thread, custom thread length |
| Coating / Lubrication | Dry film lubricant for consistent torque; PTFE coating for reduced friction |
| Inspection Point | Method |
|---|---|
| Dimensional | Optical comparator; digital calipers; go/no-go gauges |
| Thread Profile | Thread gauges; optical inspection |
| Hardness | Rockwell hardness testing per batch |
| Tensile Strength | Destructive tensile testing per ISO 3506 / ASTM F738 |
| Corrosion | Salt spray testing (ASTM B117) per specification |
| Drive Compatibility | Bit engagement test; torque-to-drive validation |
| Surface Finish | Visual inspection; XRF coating thickness (if applicable) |
Documentation Available:
Material Test Reports (EN 10204 3.1)
Dimensional Inspection Reports
Hardness & Tensile Certifications
Salt Spray Test Reports
Lot Traceability
PPAP Level 3 (automotive applications)
| Parameter | Detail |
|---|---|
| Minimum Order Quantity | 200,000 pieces (per size/configuration) |
| Retail Availability | None; wholesale / OEM / industrial supply only |
| Custom Tooling | Customer-owned tooling for head styles, drive types, or special thread forms |
| Sample Policy | Pre-production samples available for qualification; tooling fees apply for custom specifications |
| Lead Time | 6–10 weeks depending on complexity, material availability, and quantity |
| Packaging | Bulk cartons (5,000–20,000 pieces per carton); custom kitting per assembly BOM; anti-corrosion packaging available |
| Labeling | Custom labeling with lot traceability, barcoding, and customer part numbers |
| Shipping | Global export; FOB manufacturing facility or delivered pricing available |
| Step | Description |
|---|---|
| 1. Specification | Customer provides diameter, length, head style, drive type, thread type, material, finish, and any special requirements |
| 2. Engineering Review | Design feasibility assessment; CAD drawing creation; tooling requirements identified |
| 3. Tooling Development | Customer approves tooling costs; heading dies, thread rolls, and forming tools manufactured (4–6 weeks) |
| 4. Sample Qualification | 500–2,000 sample pieces produced; customer validates fit, drive performance, corrosion resistance, and installation characteristics |
| 5. Production Release | Sample approval received; batch manufacturing initiated |
| 6. Supply Agreement | Long-term supply agreement established; scheduled deliveries aligned with production requirements |
