Flat Head Self Tapping Screws 400 Pcs, 304 Stainless Countersunk Kit
What's in the Box
A 400 pcs phillips flat head self tapping screw set — M3 M3.5 M4 self tapping screw assortment kit in 304 stainless steel, 9 sizes, supplied as a flat head phillips screw kit with compartments (9 cells, one size per cell):
| Size | Qty | Size | Qty | Size | Qty |
|---|---|---|---|---|---|
| M3 × 16 mm | 70 pcs | M3.5 × 16 mm | 60 pcs | M4 × 20 mm | 30 pcs |
| M3 × 20 mm | 65 pcs | M3.5 × 20 mm | 55 pcs | M4 × 30 mm | 30 pcs |
| M3 × 30 mm | 35 pcs | M3.5 × 25 mm | 35 pcs | M4 × 40 mm | 20 pcs |
| Subtotal | 170 pcs | Subtotal | 150 pcs | Subtotal | 80 pcs |
Total: 170 + 150 + 80 = 400 pcs. More short screws, fewer long ones — matched to how repair jobs actually consume them.
Material & Selection Guide
Why 304 stainless steel matters here. These are 304 stainless steel self tapping screws — the grade most buyers pick when the fixing will see moisture: kitchens, bathrooms, balconies, garden furniture, anywhere rust staining would be unacceptable. 304 handles indoor, outdoor and damp environments well. When to step up to 316. For strong acids, heavy salt spray or permanent immersion, 316 stainless is the better answer — available as an OEM option on this assortment. Flat head vs pan head — the one thing to get right. A countersunk flat head sinks into the material and finishes flush, which is what you want on cabinet doors, hinges, board joints and anything you will touch. A pan head stays proud of the surface and gives a larger bearing face, but it protrudes. Every screw in this set is countersunk flat head.
Applications
Built as stainless steel screws for furniture assembly and cabinet hinges, and as self tapping screws for plastic and wood repairs:
| Application | What it does |
|---|---|
| Furniture assembly | Frames, joints and connectors in solid wood and board furniture |
| Cabinet & hinge installation | Cabinet doors, hinges, drawer runners and fittings |
| Plastic component fastening | Plastic housings, panels and trim |
| Home repair & DIY | Wall fixings, wooden boxes, general household repairs |
| Wood & plastic in general | Anywhere you would otherwise pre-drill and countersink by hand |
Ready Stock
This countersunk self tapping screw assortment is available from stock: 400 pcs across 9 sizes (M3 / M3.5 / M4), 304 stainless steel, in a 9-compartment clear case with a retail-ready size label. Standard stock ships promptly for retail, wholesale, distributor and private-label programs. Box 172 × 95 × 22 mm, net weight 455 g, 24 boxes per carton. Think of it as countersunk wood screws with storage case included — one tidy box instead of nine loose bags. Samples available on request.
Customization — OEM / ODM
Ready for retail and e-commerce — suitable for Amazon sellers, hardware distributors and tool brands. Beyond ready stock we support a full OEM self tapping screw assortment private label program:
| Service | What we do | What we need |
|---|---|---|
| Custom label | Your brand, size table and language on the case label | Logo, size table, languages |
| Custom packaging | Color box, sleeve, blister, hang tag, insert card | Format & dimensions |
| Box customization | Box type, compartment count, color, printing, hanging hole | Box requirements |
| In-box assortment | Size mix, length combinations, quantity ratios, material (304 / 316), head style (flat / pan / wafer), drive (Phillips / Pozi) | Size list & ratios |
| Barcode service | Printed barcodes and FNSKU labels | Barcode / FNSKU data |
| Carton mark | Outer carton printing and shipping marks | Marks & packing rules |
Bulk order process: ① Inquiry → ② Sample → ③ Packaging approval → ④ Production → ⑤ Shipment. The product page itself lists OEM/ODM supported · Barcode service · Wholesale pricing · Sample orders — contact us for details.
FAQ
Q1: What are flat head self tapping screws used for — and how do I pick flat vs pan head? A: Flat head self tapping screws (countersunk) sink into the material so nothing protrudes — the right choice for cabinet doors, hinges and board joints you will actually touch. Pan heads stand proud and offer a larger bearing face but leave a bump. Every screw in this set is countersunk flat head.
Q2: Do I need to pre-drill? A: It depends on material and thickness — our own packaging says so. Softwood and plastic usually take the screw directly; hardwoods, thicker boards or edge-near fixings benefit from a pilot hole about two-thirds of the screw diameter, which sharply reduces splitting and breakage.
Q3: Will 304 stainless steel self tapping screws rust? A: 304 resists corrosion well indoors, outdoors and in damp conditions. For strong acids, high salt spray or permanent immersion, upgrade to 316 — available as an OEM option.
Q4: What's included in the 400 pcs phillips flat head self tapping screw set? A: 400 screws in 9 sizes — M3×16 (70), M3×20 (65), M3×30 (35), M3.5×16 (60), M3.5×20 (55), M3.5×25 (35), M4×20 (30), M4×30 (30), M4×40 (20). More short screws, fewer long ones, matched to real usage.
Q5: Is this countersunk self tapping screw assortment in stock, and can you do private label? A: In stock. OEM/ODM covers private label, custom packaging, box type and compartment count, in-box assortment, barcode and FNSKU labeling, and carton marks. Wholesale pricing and sample orders are available.
Q6: Will the Phillips recess strip? A: The cross recess mates tightly with standard PH bits for strong anti-slip performance — match the bit size, keep the driver in line and apply light downward pressure. For high-volume power driving, a Pozi drive can be customized.
Order the 400 pcs flat head self tapping screws set today — 304 stainless steel countersunk screws, 9 metric sizes M3 / M3.5 / M4, sorted in a 9-compartment clear case, in stock and ready to ship. Need your brand on the label, or a different size mix? Ask about our OEM and barcode service. Request a sample / quotation →