Hastelloy C-22 Phillips pan head screws
ISO 7045ASTM B574
Hastelloy C-22 pan-head screws bring corrosion resistance across oxidising and reducing process exposures to panel and cover fixings. The cross recess transfers installation torque while the head footprint spreads load into the panel.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Solution annealed
EN 10204 3.1 MTC + heat-number traceability
Which standard is on your order?
Raw Material Specifications
Threads · Metric
Threads · Inch
Dimension Reference
Heat Treatment
Solution annealedSolution annealing dissolves detrimental precipitates, followed by rapid cooling to preserve corrosion resistance.
What we can make in Hastelloy C-22
Pan head
Use for panels and covers that can accept a projecting head, avoiding a countersink in thin sheet. The flat underside needs sufficient seat area around the clearance hole.
Phillips drive
Use a matching Phillips type H driver for service and assembly tools. A Pozidriv type Z bit is not the same fit; mismatched recess engagement increases cam-out and head damage.
Machine screw
Use with a tapped boss, nut or threaded insert in equipment panels. Match screw length to the available engagement so a blind hole does not stop the screw before the cover is clamped.
- Drive
- Type H cross recess
- Head
- Pan head
- Length basis
- Under head
- Thread
- Machine screw thread
- Final condition
- Solution annealed
- Inspection
- Head diameter · Recess · Under-head length · Threads
Manufacturing route
CNC machining suits samples and small lots. Cold heading or hot forging is selected for volume production according to alloy formability, head section and size.
Heat treatment & final condition
The final annealed or specified strengthened condition is linked to the lot; an aging treatment is not assumed for a solid-solution alloy.
Finished geometry
The cross recess is checked for tool engagement and concentricity, followed by thread gauging and under-head length inspection.
Where C-22 fits — and what matters
Chemical Processing
Process-equipment covers and shieldsHastelloy C-22 phillips pan head screws attach process-equipment covers and shields through a broad pan-head bearing face where a projecting head is acceptable and a cross-recess tool can reach the screw. Process liquid can remain at the contact after the exposed surface drains.
Pumps, Valves & OEM
Actuator housings and removable equipment coversHastelloy C-22 phillips pan head screws attach actuator housings and removable equipment covers through a broad pan-head bearing face where a projecting head is acceptable and a cross-recess tool can reach the screw. Repeated maintenance makes fit, engagement and access part of the component specification.
Mining & Mineral Processing
Chemical-recovery equipment shieldsHastelloy C-22 phillips pan head screws attach chemical-recovery equipment shields through a broad pan-head bearing face where a projecting head is acceptable and a cross-recess tool can reach the screw. Leach solution and deposits act on the installed part; corrosion duty is separate from abrasive wear.
Same phillips pan head screw. Different material priorities.
Hastelloy C-22 material dataHastelloy C-276
Resistance to chemically aggressive, mixed process streams.
- Connection priority
- Panel clamping and torque transfer through the cross recess
- Process liquid and shutdown chemistry
- C-276 is selected for its nickel–chromium–molybdenum–tungsten chemistry. Residual product, cleaning liquid and oxidising contamination can expose a sheltered connection differently from the main flow. Include liquid retained at the cross recess and the underside of the pan head in the exposure description.
Inconel 625
Solid-solution strength and resistance to aggressive process liquids.
- Connection priority
- Panel clamping and torque transfer through the cross recess
- Annealed or solution-annealed 625
- The delivery condition affects strength and high-temperature response. Keep the specified condition with the component’s mechanical acceptance; 718-style aging is not the strengthening route for 625. Include liquid retained at the cross recess and the underside of the pan head in the exposure description.
Titanium Grade 2
Low mass, corrosion resistance and commercially pure titanium formability.
- Connection priority
- Panel clamping and torque transfer through the cross recess
- Commercially pure titanium
- Grade 2 favours corrosion resistance and forming characteristics over the higher strength of Grade 5. Mating-metal contact, surface condition and assembly friction remain part of the connection design. Include liquid retained at the cross recess and the underside of the pan head in the exposure description.
From drawing to documented delivery
- 01Drawing & BOMForm, dimensions and quantity
- 02Material & formingGrade, heat and manufacturing route
- 03Final inspectionGeometry, threads and ordered tests
- 04Documents & dispatchLot records and identified packing
Order documents
- Material identity
- UNS N06022 · heat number · ordered condition
- Final-part acceptance
- Grade chemistry, supplied condition and ordered mechanical requirements.
- Dimensional record
- Head diameter · Recess · Under-head length · Threads
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Build your C-22 phillips pan head screw enquiry
Questions about C-22 phillips pan head screws
What controls installation on a thin panel?
The panel’s bearing strength and the engaged thread can govern before the screw’s tensile strength. Match the head footprint and driver recess to the tightening method and the actual panel or insert.