Incoloy 800 Socket Head Cap Screws
ISO 4762ASTM B408
Incoloy 800 socket head cap screws pair an iron-nickel-chromium alloy with compact tapped assemblies for radiant-tube, shield, and retort fixtures in furnace service. Its oxidation and carburization resistance suits fasteners exposed to hot furnace gases, while the socket drive provides access from above the head.
- 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
Partial thread
Use where a plain grip must span the clamped components. Match the under-head length and thread length so the screw tightens the stack before its thread runout reaches the tapped hole.
Full thread
Use for shorter component stacks and varied tapped-hole depths. The longer usable thread offers adjustment, while the screw end must clear the bottom of a blind hole.
- Drive
- Internal hex socket
- Length basis
- Under head
- Thread systems
- Metric · UNC · UNF · UNJ
- Assembly
- Tapped holes · Nuts
- Final condition
- Annealed
- Inspection
- Thread gauges · Head and shank dimensions
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 ordered annealed or solution-treated state is retained in the lot record; forming and machining do not replace the specified thermal condition.
Finished geometry
Head geometry, bearing face, shank and thread fit are checked after the final machining and thermal operations.
Where 800 fits — and what matters
Radiant tubes & circulation fans
Incoloy 800 Socket Head Cap ScrewsIncoloy 800 socket screws fasten compact radiant-tube brackets and fan-housing accessories exposed to hot atmospheres. Oxidation resistance is useful at these moderately loaded attachments. An internal drive lets the tool reach recessed mounting holes where there is little clearance around the head.
Connection requirements
- Tapped-hole size, thread form, and effective engagement depth
- Head diameter, head height, and counterbore clearance required
- Oxidising/carburizing duty, cycling history, and heat-number certification
Heat shields & furnace linings
Incoloy 800 Socket Head Cap Screws800 socket screws suit moderately loaded shield-retainer blocks recessed among furnace hardware. Oxidation and carburization resistance are useful at these exposed fastening points. The compact drive allows removal of the block while neighbouring supports stay installed.
Connection requirements
- Tapped-hole size, thread form, and effective engagement depth
- Head diameter, head height, and socket depth for drive engagement
- Oxidising/carburizing duty, cycling history, and heat-number certification
Retort & muffle covers
Incoloy 800 Socket Head Cap ScrewsOn retort accessory covers, Incoloy 800 socket screws provide compact fastenings that can be approached along the screw axis. The heat-resistant alloy suits hot-atmosphere exposure around the cover. This is useful where adjacent hardware makes an external hex head difficult to engage during maintenance.
Connection requirements
- Tapped-hole size, thread form, and effective engagement depth
- Head diameter, head height, and socket depth for drive engagement
- Oxidising/carburizing duty, cycling history, and heat-number certification
Same socket head cap screw. Different material priorities.
Incoloy 800 material dataIncoloy 800H Socket Head Cap Screws
Recessed support blocks on hot piping or furnace equipment can keep a small screw under load throughout the operating run. Incoloy 800H socket screws combine a creep-focused material condition with axial tool access. They serve drawing-specific hot supports where long-duration load capacity matters more than a general heat-resistant alloy designation.
Inconel 601 Socket Head Cap Screws
Inconel 601 socket head cap screws secure compact burner mounts, retort accessories and shield retainers. Oxidation resistance is useful near hot furnace atmospheres. An internal drive reaches recessed holes where surrounding hardware prevents practical access to an external hex.
A-286 Socket Head Cap Screws
Heated fixtures and compact mounting plates often leave access only along the screw axis. A-286 socket head cap screws fit those recessed positions and provide precipitation-hardened strength at elevated temperature. The combination is useful where a small mounting screw must carry a meaningful load through repeated heating.
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
- Thread gauges · Head and shank dimensions
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Build your 800 socket head cap screw enquiry
Questions about 800 socket head cap screws
What changes when the screw is stronger than the housing?
The housing thread can strip before the screw reaches its tensile capacity. The engagement depth and housing material therefore belong in the joint assessment alongside the screw’s final strength condition.