2H05 Two Hole Countersunk Self Tapping Security Screws
Countersunk head two-hole self-tapping security screws, No.4–No.14 as tabulated (2.9–6.3 mm nominal): head diameters 5.5–12.3 mm, head heights 1.7–3.9 mm. Stainless steel standard; marked lengths run from 1/4″ to 2 1/2″ per the collected matrix, cell by cell with gaps.
Last updated: 2026-11
Specifications
The countersunk self-tapping member of the two-hole line combines the flush seat with the thread-cutting point: the conical head disappears into a prepared countersink, the thread forms as it drives, and the twin-hole drive leaves nothing but two discreet holes on the finished surface. The collected tabulation runs gauges No.4 to No.14 (nominal 2.9 to 6.3 mm) with head diameters 5.5–12.3 mm and head heights 1.7–3.9 mm, states supply as standard in stainless steel in lengths from 1/4″ to 2 1/2″, and records the snake-eye/pig-nose alias family in full. The application framing the collected page gives is the telling one: areas where the aesthetic appearance matters more than the security level — trains, public lifts — because a flush security fixing reads as ordinary hardware to the eye while still requiring the special insert bit. The length matrix marks cells individually; the No.4 gauge is marked from 1/4″ to 1 1/2″, No.6 from 3/8″ to 2″, No.8 from 3/8″ to 2 1/2″, No.10 from 1/2″ to 2 1/2″, No.12 and No.14 from 1/2″ to 2″, and any pair outside those marked runs is a quotation line. Drive behaviour is family-standard: reusable two-way, low to medium torque, cam-out earlier than a pin-hex, bits wearing with use.
| Designation | 2H05 — countersunk head self-tapping security screw, two-hole drive; seats flush in a prepared countersink, thread-cutting point, two-pin insert bit |
|---|---|
| Gauge range (tabulated) | No.4, No.6, No.8, No.10, No.12, No.14 (nominal 2.9–6.3 mm) |
| Head diameter dk per gauge (mm) | No.4 5.5 · No.6 6.6 · No.8 7.8 · No.10 8.9 · No.12 10.1 · No.14 12.3 |
| Head height k per gauge (mm) | No.4 1.7 · No.6 2.1 · No.8 2.5 · No.10 3.0 · No.12 3.4 · No.14 3.9 |
| Tool size (collected) | No.4 · No.6 · No.8 · No.10 · No.12 · No.14 two-pin insert bits by gauge |
| Length availability (as marked) | No.4 1/4″–1 1/2″ · No.6 3/8″–2″ · No.8 3/8″–2 1/2″ · No.10 1/2″–2 1/2″ · No.12 1/2″–2″ · No.14 1/2″–2″ (as marked in the collected matrix; pairs outside confirmed at quotation) |
| Security principle | Reusable two-way fixing, low/medium security resistance with an aesthetics-first finish; low to medium torque |
| Materials (collected) | Stainless steel as standard; non-standard sizes and materials to order |
Materials
- Stainless steel
Ordering & documentation
Documents
Shipments are backed by Mill Test Certificate (MTC), Dimensional Report, Salt Spray Test Report on request, with full batch traceability from raw material to finished product. Quality management follows the owner-confirmed compliance list: ISO 9001:2015, RoHS, REACH. Exact document sets are confirmed on the order.
Quotation
- The fastener family (2H05 Two Hole Countersunk Self Tapping Security Screws) plus the standard designation from your drawing — DIN / ISO / JIS / ASTM / ANSI, or a drawing for custom parts.
- Size (diameter and length), thread type (metric or inch), property class or grade, and coating or finish.
- Quantity per size and your target delivery date.
- Destination country, and any required documents (for example a mill test certificate) so the quote includes them.
Sample & supply
Minimum order quantity is 10,000 pieces. Stock items run 3–7 days. Quantities or variants outside the standard range are confirmed at quotation.
Storage & shipping
Parts are packed for export and shipped factory-direct to buyers in Europe, Asia, the Americas and the Middle East. Store fasteners dry and protected until installation, and keep coated parts in their packaging until use; specific packing and preservation requirements can be stated on the order and confirmed at quotation.
Frequently asked questions
Countersunk or pan head on a self-tapping snake-eye screw?
Decide by the surface. The countersunk 2H05 seats flush — the choice on train interiors, lift cars and any public face where a proud head snags clothing or looks like hardware. The pan head 2H04 carries more bearing on thin sheet that cannot take a countersink. Both share the same gauge span, the same twin-hole drive and the same reusable two-way behaviour, so the head and the substrate finish make the decision, not the security level.
Does the countersink have to be prepared before fitting?
For the flush finish this screw is chosen for, yes: the 90° conical head needs a mating seat, and without one it sits proud or digs unevenly into thin sheet. The collected matrix marks its length cells by gauge — respect those marked pairs when planning the run, and quote the exact gauge/length combination on the RFQ so the supply matches the seats you have cut.
What is the MOQ and lead time for these security screws?
Minimum order quantity is 10,000 pieces per item. Stocked sizes ship in 3–7 days; sizes quoted as available to order, and non-standard sizes or materials, are quoted with a confirmed schedule. Confirm the exact schedule against quantity and size mix at quotation.
What should an RFQ for these security screws state?
State the designation code (2H01 through 2H14) and head style, the drive (two-hole pig nose / snake eye — fitted with a matching two-pin insert bit), thread or tapping size and length, the hole centre distance your existing bits expect (the source notes it varies between makers), material and finish, the substrate or mating part, required certificates, and quantity per size — plus destination country.
Related knowledge
- Thread-Forming vs Thread-Cutting vs Thread-Rolling Self-Tapping Screws: What the Evidence Settles on Base Material
- Screw Family Selection by Base Material: Wood, Machine and Self-Tapping Threads, Engagement and Coating
- Hex Bolts vs Socket Head Cap Screws: What the Evidence Settles on Strength, Clearance and Cost
Request a Quote
Get factory-direct pricing from the manufacturer.
What to include in your inquiry
- ✓ Standard and property class (e.g. DIN 912, ISO 4762, class 8.8) — or a drawing for custom parts.
- ✓ Sizes, lengths and thread type (metric or inch).
- ✓ Quantity per size and your target delivery date.
- ✓ Destination country, plus any coating or finish requirement.
- ✓ Any documents you need with the shipment (e.g. mill test certificate) so the quote includes them.
- ✓ Your inquiry goes straight to the factory team by email and gets a reply within 24 hours.
- ✓ Factory-direct pricing
- ✓ Standard and custom specifications
- ✓ Factory-direct export to buyers in Europe, Asia, the Americas and the Middle East
- ✓ Full fastener family support