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Medical Fasteners

Bone Screws Made to Drawing

  • Process
    Swiss turning, deep-hole drilling
  • Material
    Ti-6Al-4V ELI, CP titanium, 316LVM
  • Finish
    Anodizing, passivation, laser marking

MedCNCParts machines bone screws and other medical screws to the drawings of device OEMs and contract manufacturers. Screws are Swiss-turned from certified bar stock, finished, marked and inspected under an ISO 13485 quality system.

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Description Types Process Custom Options Tech Specs Related Products FAQs
Bone Screws Made to Drawing Desc Image

Bone Screws Made to OEM Drawings

MedCNCParts, the medical division of DEK, machines bone screws for orthopedic, trauma, spine and dental device OEMs. We machine implant components to OEM drawings as an additional capability alongside our diagnostic, instrument and equipment work. For the engineering background, see our guide to bone screw types.

Made to your drawing Icon

Made to your drawing

Every screw is made to print: there is no catalog and no stock size, only the geometry on your drawing.

Validation stays with the OEM Icon

Validation stays with the OEM

The OEM owns design validation, ISO 10993 biological evaluation, sterilization validation and regulatory clearance.

Documents on request Icon

Documents on request

Screws are inspected under an ISO 13485 quality system, with the FAI report, CoC and material certificates on request.

Bone screws from samples to repeat lots

Screws are also grouped with all medical fasteners, including device and instrument hardware. Spine programs often pair them with pedicle screws for spinal systems, and dental programs with prosthetic screws.

Bone screw types we machine

Cortical

/01
Cortical

Key features to control: a fine pitch, a full-length thread and the core diameter. Dimensional references such as ISO 5835 (hexagonal drive, spherical under-head, asymmetrical thread) apply when your drawing calls them out.

Cancellous

/02
Cancellous

Key features to control: a coarse pitch, a deep thread, and a partial thread with a smooth shank. ISO 9268 (conical under-head) applies when your drawing calls it out.

Locking

/03
Locking

Key feature to control: the threaded head, which must match the plate hole thread. Head geometry, including the locking-head thread, is checked at first article and on every lot.

Cannulated

/04
Cannulated

Key features to control: a central bore for a guide wire, with straightness and concentricity to the thread, checked at first article and on every lot. See cannulated screws.

Self-tapping

/05
Self-tapping

Key features to control: cutting flute geometry and burr-free cutting edges. Self-tapping flutes are milled, then deburred under magnification.

Headless compression

/06
Headless compression

Key features to control: two thread zones with different pitch, timed to each other. Thread profile, pitch and pitch diameter are checked at first article and on every lot.

How we manufacture bone screws

  • Materials
  • Machining
  • Finishing
  • Inspection
  • Materials

    Titanium and 316LVM

    We machine the grade on your drawing and supply its mill certificate on request. Ti-6Al-4V ELI (ASTM F136 / ISO 5832-3) is the usual alloy for metallic bone screws; CP titanium (ASTM F67) has lower strength and is used where the OEM's design specifies it; 316LVM stainless (ASTM F138 / ISO 5832-1) is passivated after machining.

    Specifications apply when the drawing calls for them; see titanium grades we machine.

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  • Machining

    Swiss-type turning

    Swiss-type turning of screw blanks supports the bar close to the cut in a guide bushing, which keeps long, slender screws straight from tip to head. Cannulation is gun drilled or deep-hole drilled with drift controlled over the bore length; see deep-hole drilling for cannulation.

    Drive recesses (hex, hexalobular or cruciform) are broached or milled on the Swiss lathe, and screws are cleaned before finishing so no machining residue is trapped in threads or bores.

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  • Finishing

    Finishing and marking

    Finishes are applied per your drawing: Type II anodizing of titanium per AMS 2488, titanium color anodizing for size or length coding with the color code set by the OEM, passivation of 316LVM per ASTM A967 or ASTM F86 as called out, and electropolishing where the drawing requires it.

    UDI laser marking applies lot, size or UDI data, for direct marking under 21 CFR 801.45 when the head offers room.

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  • Inspection

    Inspection and records

    Critical features are agreed at drawing review, then checked at first article and on every lot: thread profile, pitch and pitch diameter, major and minor diameter, drive recess dimensions and depth, cannulation, head geometry and burr-free threads and flutes. The FAI report is available on request.

    Mechanical tests such as ASTM F543 (torsion, driving torque, pull-out) belong to the OEM's design verification; we supply parts from the production process for that testing.

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Fully Custom Materials & Surface Finishes Options

MedCNCParts offers a wide range of materials and surface treatments for medical parts.

Surface Finishing
Materials
  • Electropolishing
    Electropolishing medical metals produces smooth, clean, corrosion-resistant surfaces, removing burrs and impurities to ensure biocompatibility, sterility, and reliable device performance.
  • Passivation
    MedCNCParts provides medical CNC parts with precision passivation, removing contaminants and restoring stainless steel’s oxide layer for corrosion-resistant, implant-ready components.
  • Electroplating
    Precision electroplating for medical devices strengthens surfaces, maintains biocompatibility, and ensures clinical-grade, ISO-compliant, traceable finishes for implants and surgical instrumentation.
  • Laser Marking
    MedCNCParts provides precise, compliant laser marking and UDI on medical components, ensuring traceability, regulatory adherence, and long-lasting surface quality.
  • Anodizing
    Anodizing components for medical use strengthens surface protection, cleanliness, and biocompatibility, ensuring durable, traceable, and implantable-grade finishes for precision-machined parts.
  • Titanium Coloring
    With MedCNCParts’ titanium coloring, medical devices gain validated biocompatibility, precise differentiation, and assured compliance with stringent implantable certification standards.
  • Powder Coating
    Biocompatible powder coating creates corrosion-resistant, uniform finishes on medical parts, maintaining micro-precision, cleanliness, and validation-ready surfaces for surgical devices.
  • Titanium
    MedCNCParts offers precise, fast-turnaround CNC machining titanium with implant-grade quality, ultra-clean operations, and reliable small-batch medical part production.
  • Acrylic
    MedCNCParts’ machining services deliver precision-shaped components with refined finish, durability, and consistent optical performance for healthcare use.
  • Stainless Steel
    MedCNCParts offers advanced CNC machining for medical components, producing stainless steel parts for surgical and implantable applications to exacting ISO tolerances with fast turnaround.
  • Copper
    MedCNCParts’ CNC machining Copper ensures ISO 13485-certified cleanliness, precise tolerances, and consistent quality across surgical, diagnostic, and implantable copper components.
  • Aluminum
    MedCNCParts focus on traceability, process compliance, and rapid-response production makes us a trusted partner.
  • PEEK
    MedCNCParts machines PEEK components using validated processes, micro-precision, and complete inspection for advanced medical devices.
  • Polycarbonate
    MedCNCParts ensures consistent quality and fast turnaround for complex, small-batch medical applications.

Tech Specs

Bone Screws Made to Drawing Specs Image
Part types Cortical, cancellous, locking, cannulated, self-tapping and headless compression screws
Materials Ti-6Al-4V ELI (ASTM F136), CP titanium (ASTM F67), 316LVM (ASTM F138)
Process Swiss-type turning, gun or deep-hole drilling
Finishes Type II anodizing (AMS 2488), passivation (ASTM A967, ASTM F86), electropolishing
Marking Lot, size or UDI data (21 CFR 801.45)
Inspection At first article and on every lot
Documentation FAI report, CoC, material certificates, CMM report on request
Standards ISO 5835, ISO 9268 when on your drawing

Bone Screw FAQs

FAQs

Send your bone screw drawing with the material, quantities and documents you need.

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MedCNCParts manufactures components to customer specifications; it does not design or market medical devices.

Which bone screw types can you manufacture?

Cortical, cancellous, locking, cannulated, self-tapping and headless compression screws, all to your drawing.

What materials do you use for bone screws?

Ti-6Al-4V ELI (ASTM F136) and 316LVM stainless steel (ASTM F138), with lot traceability and mill certificates on request; CP titanium and other grades on request.

Do you thread-whirl bone threads?

Thread whirling on Swiss-type lathes is the usual method for long, fine bone threads with minimal burrs, and it is how we cut them.

Can you anodize and laser-mark screws?

Yes. Titanium screws can be Type II or color anodized and laser-marked with lot or UDI data, so they ship finished and marked to your specification.

What is the minimum order for custom bone screws?

There is no fixed minimum: programs run from engineering samples to repeat production lots of 10,000+ pieces.

Do you provide test data such as torque or pull-out?

Mechanical testing per ASTM F543 is part of the OEM's design verification. On request, we supply dimensional inspection data, FAI reports and material certificates, plus parts for your testing.

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