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Finding the right small-diameter machine screw in a corrosion-resistant material is a common challenge for electronics assemblers, instrument makers, hobbyists, and light fabrication shops. Generic zinc-plated screws corrode in humid environments, and sourcing the exact size in stainless steel often means ordering from multiple suppliers. These M1.6 to M10 slotted cheese head machine screws are manufactured to DIN 84 in A2 (304) stainless steel, covering the full range of common metric sizes in a single product listing.
Each screw features a cylindrical cheese head profile with a flat top and straight sides, providing a clean, compact appearance and a solid bearing surface without requiring a countersink. The slotted (flat-blade) drive is universally compatible with standard and precision flat-blade screwdrivers. Thread sizes span M1.6, M2, M2.5, M3, M4, M5, M6, M8, and M10 (ISO metric coarse thread, DIN 84), with shank lengths ranging from 3mm (≈1/8") to 60mm (≈2-3/8"). Packs are available in 5 or 20 pieces per order.
Typical applications include precision instrument assembly and electronics enclosures requiring small-diameter stainless machine screws, light machinery and appliance panels where a compact cylindrical head is preferred over a hex bolt, and general fabrication, prototyping, and repair work where A2 stainless steel corrosion resistance is needed without the cost premium of marine-grade 316.
| Material | A2 Stainless Steel (304 Grade) |
|---|---|
| Standard | DIN 84 (ISO metric coarse thread) |
| Available Thread Sizes | M1.6, M2, M2.5, M3, M4, M5, M6, M8, M10 |
| Thread Pitch | M1.6: 0.35mm | M2: 0.4mm | M2.5: 0.45mm | M3: 0.5mm | M4: 0.7mm | M5: 0.8mm | M6: 1.0mm | M8: 1.25mm | M10: 1.5mm |
| Screw Length Range | 3mm (≈1/8") – 60mm (≈2-3/8") |
| Head Type | Cheese Head (cylindrical, flat top) — DIN 84 |
| Drive Type | Slotted (flat-blade) |
| Property Class | Typically A2-70 — Contact us to confirm |
| Tensile Strength | Typically ≥700 MPa (A2-70) — Contact us to confirm |
| Pack Quantities | 5 or 20 pieces |
| Corrosion Resistance | Good — suitable for indoor and light outdoor use |
For DIN 84 cheese head screws, the listed length is the full length of the shank including the head. A general rule is to engage at least 1.5× the screw diameter into the receiving material. For example, an M4 screw should typically thread at least 6mm into the tapped hole or nut. Available lengths range from 3mm (≈1/8") to 60mm (≈2-3/8") — select based on your material stack-up and required thread engagement.
A2 stainless steel machine screws are generally rated to property class A2-70, with a minimum tensile strength of approximately 700 MPa. For safety-critical or structural applications, please contact us to confirm the exact property class before ordering.
A2 (304) stainless steel offers good general corrosion resistance and is suitable for indoor, light outdoor, and mildly humid environments. For marine, coastal, or chloride-heavy environments, A4 (316) stainless steel is generally recommended. These screws are well-suited for electronics enclosures, appliances, light machinery, and general fabrication where moderate corrosion resistance is required.
These screws follow the ISO metric coarse thread standard per DIN 84. Thread pitches are: M1.6 — 0.35mm, M2 — 0.4mm, M2.5 — 0.45mm, M3 — 0.5mm, M4 — 0.7mm, M5 — 0.8mm, M6 — 1.0mm, M8 — 1.25mm, M10 — 1.5mm. They are compatible with standard ISO metric hex nuts, nylon lock nuts, threaded inserts, and tapped holes. Always verify thread pitch and size compatibility before assembly.
A cheese head (DIN 84) is a cylindrical head with a flat top and straight sides. It provides a larger bearing surface than a countersunk head without requiring a countersink in the material, and has a more compact profile than a pan head. It is commonly used in precision instruments, electronics, light machinery, and applications where a clean, low-profile appearance is preferred and a flush fit is not required.
These screws use a slotted (flat-blade) drive. Select a screwdriver blade width that closely matches the slot width of the screw head to avoid slipping and head damage. For small sizes like M1.6–M2.5, a precision or watchmaker’s flat-blade screwdriver is typically appropriate. For M3 and larger, a standard flat-blade screwdriver works well. Apply steady axial pressure during installation to minimize cam-out risk.
A2 stainless (304 grade) is suitable for general indoor and mild outdoor use and is the most widely used stainless steel grade for fasteners. A4 stainless (316 grade) adds molybdenum, providing significantly better resistance to chlorides, salt spray, and acidic environments. For marine, coastal, or chemical exposure applications, A4 is generally recommended. For most indoor and general-purpose applications, A2 is sufficient and more cost-effective.
Packs are available in 5 or 20 pieces. For a single repair, prototype, or low-volume project, a 5-piece pack is typically sufficient. For ongoing production, maintenance, or workshop stock, the 20-piece pack offers better per-unit value. Contact us if you need quantities larger than 20 pieces.
