Military black stainless steel self tapping screw No.6 x 1/2" A4 316 pozi countersunk
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No. 6 x 1/2" Black A4 Stainless Screw
Premium Pozi Countersunk Marine Fastener
Upgrade your marine or outdoor hardware with these high-performance A4 (316) Grade Stainless Steel self-tapping screws. Featuring a professional black chemical finish, these screws are perfect for applications where both aesthetic appeal and extreme corrosion resistance are required.
Key Features
- ✔ A4 (316) Stainless: Ultimate rust protection
- ✔ Black Finish: Sleek, non-reflective matte look
- ✔ Pozi Drive: Reduced "cam-out" vs Phillips
- ✔ Countersunk Head: Sits flush with surface
Technical Specs
| Gauge: | No. 6 (3.5mm) |
| Length: | 1/2" (13mm) |
| Material: | A4-316 Stainless Steel |
| Drive Type: | Pozi #2 |
| Standard: | DIN 7982 / ISO 7050 |
Compatibility / Fitment Guide
| Application | Use Case | Notes |
|---|---|---|
| Marine Electronics | Mounting black-faced gauges/speakers | Matches black trim perfectly |
| Deck Hardware | Fixing trim, vents, or light housings | Salt-water corrosion resistant |
| Automotive/Van | Exterior plastic trim or interior panels | A4 grade superior to standard A2 |
Standard References
| Standard Spec | DIN 7982 / ISO 7050 |
| Metric Equivalent | 3.5mm Diameter x 13mm Length |
| Thread Type | Type AB (Self-Tapping) |
Questions & Answers
Will the black finish wear off or rust?
The base material is solid A4 (316) Stainless Steel, which is rust-proof even if the black coating is scratched. The finish is a durable chemical blacking designed to withstand external exposure.
How do I know if it is compatible?
If you are replacing an existing No. 6 gauge screw (approx 3.5mm thick) with a 1/2 inch reach, this is the correct direct replacement. We recommend a pilot hole for hard materials.
What is the difference between A2 and A4 stainless?
A4 (316) grade contains molybdenum, providing significantly higher corrosion resistance than A2 (304), especially in coastal and marine environments where salt spray is present.
Note: Please verify your required gauge and length before ordering. For bulk requirements, visit 4boats.co.uk.
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