Self Tapping Screws Complete Classification Guide. Guide complet de Self Tapping Screws Complete Classification Guide - spécifications, applications et sélection de fournisseurs pour export B2B vers les marchés africains.
What Are Self Tapping Screws?
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304 Stainless vs Carbon Steel Self Tapping Screws
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Pan Head vs Washer Head Self Tapping Screws
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Self Tapping Screws for Exterior Wall Insulation and Color Steel Roof
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Self Locking and High Strength Self Tapping Screws
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Self Tapping Screw Selection Guide
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| Type | Drive | Head | Material | Best Application |
|---|---|---|---|---|
| Type AB (Fine-Coarse) | Phillips/Pozi | Pan/Flat/Oval | CS ZP, SS 304/316 | Sheet metal, plastics |
| Type B (Coarse) | Phillips/Pozi | Pan/Truss | CS ZP, SS 304/316 | General purpose, dry wall |
| Self Drilling #2 | Hex/Phillips | Washer Head | CS ZP, SS 410 | Roofing, cladding, steel up to 2.3mm |
| Self Drilling #3 | Hex/Phillips | Washer Head | CS ZP, SS 410 | Roofing, cladding, steel up to 4.0mm |
| Self Drilling #4 | Hex/Phillips | Washer Head | CS ZP, SS 410 | Thick steel, structural connections |
| Insulation Screw | Phillips | Large Plastic Disc | CS ZP, SS 304 | Exterior insulation boards |
Frequently Asked Questions
See frequently asked questions below.
What is the difference between self tapping and self drilling screws?
Self tapping screws require a pre-drilled pilot hole; the screw only forms threads. Self drilling screws have a built-in drill tip that creates the pilot hole AND forms threads in one step.
What EPDM washer size for color steel roofing screws?
Standard EPDM washer for roofing is 15mm ID × 4mm thick × 35mm OD for M6 screws. For larger screws or insulation applications, 50-60mm OD washers are used.
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