Which screwdriver bit do I need for slotted pan head screws?

You need a flat-blade (slotted) screwdriver. The correct blade width depends on the screw size — typically 0.4mm blade for M1.6, up to 1.6mm for M8–M10. Using an undersized blade risks cam-out and head damage.

Slotted Pan Head Machine Screws A2 Stainless Steel DIN 85 — M1.6 to M10

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Slotted Pan Head Machine Screws A2 Stainless Steel DIN 85 — M1.6 to M10

Name: Slotted Pan Head Machine Screws A2 Stainless Steel DIN 85 — M1.6 to M10
Brand: HomeDIYer
Price: 5.64 USD
Availability: InStock

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By HomeDIYer®

Thread Size: M1.6

Bolt Length: 3mm

Amount(pcs): 20

Price:

$5.64 USD

Stock:

In stock (500 units), ready to be shipped

Quantity:

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Slotted Pan Head Machine Screws — A2 Stainless Steel, DIN 85, M1.6 to M10

When a project calls for a clean, low-profile fastener that won't corrode or leave rust streaks, most builders quickly discover how hard it is to find slotted pan head machine screws in the exact size they need. Electronics assemblers, model makers, appliance repair technicians, and general fabricators all share the same frustration: mismatched grades, wrong lengths, or packs too large to justify for a small run.

Each set in this listing is machined from A2 stainless steel (equivalent to 304 SS) and manufactured to the DIN 85 standard. The pan head profile features a flat bearing surface with a rounded top and a wide, shallow slot. Thread sizes span M1.6 through M10, with bolt lengths ranging from 3mm (≈1/8") to 60mm (≈2-3/8"), available in quantities from 1 piece up to 200 pieces per order — so you can stock exactly what you need without overpaying for bulk.

Typical use cases include securing PCB standoffs and enclosure panels in electronics assemblies, fastening thin sheet metal in HVAC and appliance repair, assembling optical and laboratory equipment where a low magnetic signature matters, and general-purpose metric fastening in furniture, fixtures, and DIY projects where a flat-head screw would sit proud of the surface.

🔩 Compatibility: ISO metric coarse thread (M profile) per DIN 85. Fits standard metric nuts, hex standoffs, and tapped holes of the corresponding size. Not compatible with UNC/UNF inch threads.

⚠️ Heads up: Slotted drives are more prone to cam-out than Phillips or hex drives. Use a correctly sized flat-blade screwdriver and apply firm axial pressure, especially on smaller sizes (M1.6–M2.5). Confirm thread engagement depth before final torque.

✅ Key Features of These Slotted Pan Head Machine Screws

🦠A2 Stainless Steel Construction — Manufactured from 304-equivalent stainless steel, these slotted pan head screws resist oxidation and surface rust in indoor and light outdoor environments without any additional coating.
📐DIN 85 Pan Head Profile — The wide, flat underside distributes clamping load evenly, reducing the risk of pull-through in thin sheet metal, plastic panels, and soft substrates compared to countersunk or cheese-head styles.
🔢Wide Size Range — M1.6 to M10 — Covering nine thread sizes and lengths from 3mm to 60mm, this range handles everything from miniature electronics fastening (M1.6–M2.5) to medium-duty structural assembly (M8–M10).
📦Flexible Pack Quantities — Order as few as 1 piece or as many as 200 pieces per variant, making these metric machine screws practical for both one-off repairs and small-batch production runs.
🧲Low Magnetic Permeability — A2 stainless steel is non-magnetic in its annealed state, making these screws suitable for sensitive electronic enclosures, MRI-adjacent equipment, and applications where ferrous fasteners would cause interference.
📏Metric Coarse Thread Compatibility — Full ISO metric coarse thread form ensures interchangeability with standard metric nuts, inserts, and tapped holes — a critical requirement for DIN 85 slotted pan head bolts used in precision assemblies.

📐 Technical Specifications — Slotted Pan Head Machine Screws DIN 85

Standard	DIN 85
Head Style	Pan head (slotted drive)
Drive Type	Slotted (flat blade)
Material	A2 Stainless Steel (304 equivalent)
Thread Type	ISO Metric Coarse (M profile)
Thread Size Range	M1.6, M2, M2.5, M3, M4, M5, M6, M8, M10
Bolt Length Range	3mm (≈1/8") – 60mm (≈2-3/8")
Pack Quantity Options	1, 2, 5, 10, 20, 50, 100, 200 pcs (varies by size)
Finish	Natural stainless (no coating)
Tensile Strength (typical)	≥700 MPa (ISO 3506 property class 70)
Corrosion Resistance	Good — indoor and light outdoor use; not rated for marine/salt spray
Magnetic Properties	Generally non-magnetic (annealed A2)
Country of Origin	See variant options
RoHS Status	Contact us to confirm

❓ Frequently Asked Questions

How do I choose the right bolt length for my application?

A general rule is to select a bolt length equal to the thickness of the material being fastened plus 1–1.5× the thread diameter for engagement. For example, fastening a 5mm panel with an M3 screw typically calls for an 8–10mm bolt length (5mm material + ~4mm engagement). Always confirm clearance on the back side before ordering. If you need help converting: 10mm ≈ 3/8", 25mm ≈ 1", 50mm ≈ 2".

What is the tensile strength of A2 stainless steel screws?

A2 stainless steel per ISO 3506 property class 70 generally has a minimum tensile strength of 700 MPa and a proof load stress of approximately 450 MPa. For high-load structural applications where greater strength is needed, A4-80 grade (316 SS, 800 MPa) is typically recommended instead.

Can these screws be used outdoors or in wet environments?

A2 stainless steel offers good corrosion resistance for most indoor and light outdoor use — rain exposure, humidity, and mild chemical contact are generally handled well. For marine environments, salt spray, or prolonged immersion, A4 (316) stainless is typically the better choice. Avoid contact with dissimilar metals in wet conditions to prevent galvanic corrosion.

What thread standard do these screws follow, and will they fit my nuts?

These screws follow the ISO metric coarse thread standard (M profile) as specified in DIN 85. They are compatible with standard metric hex nuts, nylon-insert lock nuts, hex standoffs, and tapped holes of the corresponding size. They are not compatible with UNC or UNF inch-standard threads.

Which screwdriver do I need for slotted pan head screws?

You need a flat-blade (slotted) screwdriver. The correct blade width depends on the screw size — typically a 0.4–0.6mm blade for M1.6–M2, up to a 1.2–1.6mm blade for M6–M10. Using an undersized blade risks cam-out and head damage. Apply firm axial pressure while turning to maintain engagement, especially on smaller sizes.

Are these screws RoHS compliant?

A2 stainless steel is generally considered RoHS-compliant as it does not contain restricted substances such as lead, cadmium, hexavalent chromium, or mercury. If you need formal documentation for your compliance program, please contact us to confirm before ordering.

Can I use these in aluminum or plastic assemblies?

Yes. The pan head profile distributes clamping load over a wider bearing area than a countersunk head, making it well-suited for softer materials like aluminum sheet, ABS, acrylic, and polycarbonate. Pre-drilling a clearance hole is recommended to avoid cracking thin plastics. For aluminum, consider using a thread-locking compound if vibration is a concern.

🛒 Select your thread size, bolt length, and quantity above, then add to cart — ships from our US warehouse.