CP22 5-Lobe Pin TX Button Head Captive Screws
Button head 5-lobe pin TX captive security screws, M3–M8 as tabulated: head diameters 5.6–13.8 mm, head heights 1.5–4.3 mm, reduced shank d1 2.2–6.2 mm, L1 6.0–16.0 mm. Material-coded availability matrix from 12 mm to 100 mm; A2/304 and A4-70 stainless steel standard; d1 and L1 to customer specification.
Last updated: 2026-11
Specifications
CP22 merges the two security ideas this family has been building: a 5-lobe pin drive that ordinary bits cannot turn, and a captive reduced shank that the screw cannot leave. Below the button head the shank steps down to d1 (2.2–6.2 mm across the range) for the length L1 (6.0–16.0 mm); installed with threaded captive washers, the screw self-retains in its panel so it travels with the door or lid instead of dropping into machinery — the loss-prevention half of the specification, and the reason captive screws are standard on equipment doors that get opened daily. The collected tabulation runs M3 to M8 with head diameters 5.6–13.8 mm and head heights 1.5–4.3 mm, matching the TX09 button-head dimensions, and states manufacture from A2/304 and A4-70 stainless steel as standard, with d1 and L1 available to customer specification. The availability matrix is material-coded cell by cell from 12 mm to 100 mm: the marked spine climbs diagonally — M3 only at 12 mm, M4 at 16–50 mm, M5 at 20–50 mm, M6 at 25–50 mm, M8 from 40 to 100 mm with the 60–100 mm tail marked A4-70 only. The drive is a reusable two-way fixing for higher-torque, regularly serviced panels.
| Designation | CP22 — button head captive security screw, 5-lobe pin TX drive; reduced shank below the head self-retains with threaded captive washers so the screw cannot be separated from its panel |
|---|---|
| Thread range (tabulated) | M3, M4, M5, M6, M8 |
| Head diameter dk per thread (mm) | M3 5.6 · M4 7.4 · M5 9.3 · M6 10.3 · M8 13.8 |
| Head height k per thread (mm) | M3 1.5 · M4 2.8 · M5 2.6 · M6 3.2 · M8 4.3 |
| Reduced shank d1 per thread (mm) | M3 2.2 · M4 3.0 · M5 3.8 · M6 4.5 · M8 6.2 |
| Shank length L1 per thread (mm) | M3 6.0 · M4 8.0 · M5 10.0 · M6 12.0 · M8 16.0 — d1 and L1 to customer specification per the collected page |
| Tool size (collected) | No.1 (M3, M4) · No.2 (M5, M6) · No.2.5 (M8) |
| Length availability (as marked) | M3 12 · M4 16–50 · M5 20–50 · M6 25–50 · M8 40–100, 60–100 mm A4-70 marker only; unmarked pairs confirmed at quotation — Availability matrix legend (as collected): stainless-triangle marker = A2 stainless steel; black-triangle marker = A4-70 stainless steel |
| Security principle | Reusable two-way fixing; captive retention prevents fastener loss; 5-lobe pin drive resists ordinary tools; higher-torque capable per the collected page |
Materials
- A2 / 304 stainless steel
- A4-70 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 (CP22 5-Lobe Pin TX Button Head Captive 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
What does the captive feature actually do in service?
It keeps the screw with its panel. The reduced shank — the unthreaded d1 portion below the head — passes through a clearance hole while the threaded section engages a captive washer or boss, so once installed the screw stays on the door or lid even fully unwound. On equipment serviced daily, that ends both the dropped-screw-into-the-machinery problem and the missing-screw-on-reassembly problem. The collected page pairs it with threaded captive washers and confirms d1 and L1 can be made to customer specification if your panel build-up needs a different engagement length.
Captive plus 5-lobe pin — when is the combination worth specifying?
Wherever two risks overlap: panels that must come off regularly (so a permanent one-way fixing is wrong) and panels that must not lose their fixings or be opened by the public (so an ordinary screw is wrong too). The collected positioning — medical equipment, plant guards, serviced enclosures — is exactly that overlap. Specify the drive explicitly on the RFQ: this is the button-head captive; the countersunk captive CP22's sibling CP23 covers flush panels on the same drive.
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; unmarked matrix pairs, zinc-plated steel on request, and specials made to order 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 and head style, the drive (5-lobe pin TX or 7-lobe pin — matched restricted insert bits required), thread or tapping size and length, the material marker you expect (A2 or A4-70 stainless; zinc-plated steel on request), the substrate or mating part, required certificates, and quantity per size — plus destination country. If you are matching existing fixings, name the drive generation explicitly: 5-lobe, 6-lobe and 7-lobe pin bits are not interchangeable.
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