Incoloy 800 Set screws
ISO 4026 / ISO 4027ASTM B408
Incoloy 800 set screws put heat and oxidation resistance for thermal equipment 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
- 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
AnnealedAnnealing reduces work hardening and restores ductility for the specified supplied condition.
What we can make in Alloy 800
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
- 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 ordered annealed or solution-treated state is retained in the lot record; forming and machining do not replace the specified thermal condition.
Finished geometry
The point is checked for geometry and surface damage; a corrosion-resistant alloy does not automatically provide a hardened biting edge.
Where 800 fits — and what matters
Furnaces & Heat Treatment
Fixture pivots and conveyor shaftsIncoloy 800 set screws lock collars or hubs to fixture pivots and conveyor shafts. Cup, cone, flat and dog points transfer load through different shaft contacts or locating features. Hot dwell, thermal expansion and repeated furnace cycles set the working load.
Power & Turbines
Hot-duct linkage pins and damper spindlesIncoloy 800 set screws lock collars or hubs to hot-duct linkage pins and damper spindles. Cup, cone, flat and dog points transfer load through different shaft contacts or locating features. Hot dwell and start-stop expansion act on the supported or moving component.
Chemical Processing
Reformer support pins and heater-fixture rodsIncoloy 800 set screws lock collars or hubs to reformer support pins and heater-fixture rods. Cup, cone, flat and dog points transfer load through different shaft contacts or locating features. These parts work in the heated equipment zone, where sustained loading and thermal expansion govern their section and clearance.
Same set screw. Different material priorities.
Incoloy 800 material dataIncoloy 800
UNS N08800 · Current grade- Carbon
- ≤0.10%
- What changes
- General heat and oxidation resistance; no grain-size requirement in the family comparison.
Incoloy 800H
UNS N08810- Carbon
- 0.05–0.10%
- What changes
- Controlled carbon and coarse-grain condition for creep and stress-rupture duty.
Incoloy 800HT
UNS N08811- Carbon
- 0.06–0.10%
- What changes
- Tighter carbon and Al + Ti control (0.85–1.20%), with solution treatment and coarse grain for creep duty.
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 N08800 · 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 800 set screw enquiry
Questions about 800 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.