Incoloy 800HT Phillips pan head screws
ISO 7045ASTM B408
Incoloy 800HT pan-head screws bring tightly controlled carbon and Al + Ti for creep duty 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 (≥1149°C / 2100°F)
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 annealedThe specified solution treatment develops the controlled grain structure needed for sustained high-temperature creep duty.
What we can make in Alloy 800HT
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 (≥1149°C / 2100°F)
- 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
Solution annealing at a minimum of 1149°C (2100°F) establishes the coarse-grain condition used for creep resistance. The heat-treatment record and grain-size result identify this delivery state.
Finished geometry
The cross recess is checked for tool engagement and concentricity, followed by thread gauging and under-head length inspection.
Where 800HT fits — and what matters
Furnaces & Heat Treatment
Furnace shields and casing panelsIncoloy 800HT phillips pan head screws attach furnace shields and casing panels through a broad pan-head bearing face where a projecting head is acceptable and a cross-recess tool can reach the screw. Hot dwell, thermal expansion and repeated furnace cycles set the working load.
Power & Turbines
Hot-duct shields and thermal bafflesIncoloy 800HT phillips pan head screws attach hot-duct shields and thermal baffles through a broad pan-head bearing face where a projecting head is acceptable and a cross-recess tool can reach the screw. Hot dwell and start-stop expansion act on the supported or moving component.
Chemical Processing
Process-heater shields and bafflesIncoloy 800HT phillips pan head screws attach process-heater shields and baffles through a broad pan-head bearing face where a projecting head is acceptable and a cross-recess tool can reach the screw. These parts work in the heated equipment zone, where sustained loading and thermal expansion govern their section and clearance.
Same phillips pan head screw. Different material priorities.
Incoloy 800HT material dataIncoloy 800
UNS N08800- 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 · Current grade- 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 N08811 · heat number · ordered condition
- Final-part acceptance
- UNS grade, carbon and alloy chemistry, solution-treatment record and ordered grain-size evidence.
- Dimensional record
- Head diameter · Recess · Under-head length · Threads
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Build your 800HT phillips pan head screw enquiry
Questions about 800HT 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.