Hastelloy C-276 Set screws
ISO 4026 / ISO 4027ASTM B574
Hastelloy C-276 set screws put resistance to chemically aggressive, mixed process streams at a small, highly loaded shaft contact. Point style and the final hardness determine whether that contact locates, clamps or indents the mating part.
- 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-276
Flat point
Use for repeated adjustment against a flat or pad where deep penetration is unwanted. A prepared flat on the shaft gives more stable seating than contact on a round surface.
Cone point
Use for positive location in a prepared dimple on a shaft or collar. The concentrated tip contact can mark the component, making it less suitable for frequent repositioning on a finished shaft.
Dog point
Use the cylindrical tip in a hole or guide slot to locate a collar or restrict travel. Control tip diameter and projection to avoid binding or bottoming in the mating feature.
Cup point
Use on shaft collars and hubs where the cup edge can bite into the shaft to resist slip. Expect a contact mark; use a prepared seat when repeated removal and repositioning matter.
- Drive
- Internal hex socket
- Point forms
- Flat · Cone · Dog · Cup
- Length basis
- Overall length
- Threads
- Metric · Inch
- Final condition
- Solution annealed
- Inspection
- Point geometry · Overall length · Socket · Threads
Manufacturing route
CNC machining suits small lots and special points. The socket and flat, cup, cone or dog point are produced as functional features on the same axis.
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 point is checked for geometry and surface damage; a corrosion-resistant alloy does not automatically provide a hardened biting edge.
Where C-276 fits — and what matters
Chemical Processing
Pump shafts and mixer-drive partsHastelloy C-276 set screws lock collars or hubs to pump shafts and mixer-drive parts. Cup, cone, flat and dog points transfer load through different shaft contacts or locating features. Process liquid can remain at the contact after the exposed surface drains.
Pumps, Valves & OEM
Valve stems and pump-drive collarsHastelloy C-276 set screws lock collars or hubs to valve stems and pump-drive collars. Cup, cone, flat and dog points transfer load through different shaft contacts or locating features. Repeated maintenance makes fit, engagement and access part of the component specification.
Mining & Mineral Processing
Dosing-pump shafts and agitator-drive partsHastelloy C-276 set screws lock collars or hubs to dosing-pump shafts and agitator-drive parts. Cup, cone, flat and dog points transfer load through different shaft contacts or locating features. Leach solution and deposits act on the installed part; corrosion duty is separate from abrasive wear.
Same set screw. Different material priorities.
Hastelloy C-276 material dataInconel 625
Solid-solution strength and resistance to aggressive process liquids.
- Connection priority
- Local contact pressure at the point
- 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 point against the shaft and the blind drive recess in the exposure description.
Hastelloy C-22
Corrosion resistance across oxidising and reducing process exposures.
- Connection priority
- Local contact pressure at the point
- Production and cleaning cycles
- C-22’s chromium-bearing chemistry is relevant when chemical exposure changes between operating and cleaning cycles. Include both liquids when comparing it with C-276 or a B-type nickel alloy. Include liquid retained at the point against the shaft and the blind drive recess in the exposure description.
Titanium Grade 2
Low mass, corrosion resistance and commercially pure titanium formability.
- Connection priority
- Local contact pressure at the point
- 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 point against the shaft and the blind drive recess 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 N10276 · heat number · ordered condition
- Final-part acceptance
- Grade chemistry, supplied condition and ordered mechanical requirements.
- Dimensional record
- Point geometry · Overall length · Socket · Threads
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Build your C-276 set screw enquiry
Questions about C-276 set screws
Should point hardness always be maximised?
A very hard point can damage a softer shaft, while a soft point can flatten on a hard surface. The point geometry, shaft hardness and required holding or locating function determine the useful combination.