A-286 Socket Head Cap Screws
ISO 4762
A-286 socket head cap screws pair an iron-base precipitation-hardened austenitic alloy with a compact, tapped assembly form for hot, space-constrained fixtures and components. The alloy retains strength through sustained heat and cycling.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Solution treated and aged
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 treated and agedSolution treatment is followed by precipitation aging, with the Grade 660 class defining the required heat-treatment route and final properties.
What we can make in A-286
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
- Solution treated and aged
- Inspection
- Thread gauges · Head and shank dimensions
Manufacturing route
CNC machining suits samples and small batches. Volume heads are formed in a workable condition with the final aging route included in process planning.
Heat treatment & final condition
Solution treatment and the specified aging condition are recorded against the production lot; final dimensions are checked after thermal processing.
Finished geometry
Head geometry, bearing face, shank and thread fit are checked after the final machining and thermal operations.
Where A-286 fits — and what matters
Gear & shaft heat-treatment fixtures
A-286 Socket Head Cap ScrewsA-286 socket screws can secure fixture blocks and locating hardware where heat-treatment tooling leaves only axial access to the fastener. Their elevated-temperature strength is useful in loaded fixtures. The actual furnace cycle matters, since a fixture repeatedly exposed to a heat-treatment temperature may change the condition of its own fasteners.
Connection requirements
- Tapped-hole size, thread form, and effective engagement depth
- Head diameter, head height, and socket depth for drive engagement
- Temperature range, cycling duty, and precipitation-hardened condition certification
Heated powertrain & battery test rigs
A-286 Socket Head Cap ScrewsTest-rig mounting plates often need strong, recessed screws near heaters and instrumentation. A-286 combines hot strength with the compact tool access of a socket head. It is useful for fixture attachments that remain assembled through repeated test cycles and must still be reached when the rig is serviced.
Connection requirements
- Tapped-hole size, thread form, and effective engagement depth
- Head diameter, head height, and counterbore clearance required
- Temperature range, cycling duty, and precipitation-hardened condition certification
Precision rotary tables & spindle mounts
A-286 Socket Head Cap ScrewsHeated spindle and rotary-table mounts can use A-286 socket screws where mounting loads and temperature justify hot-strength bolting. The internal drive fits closely spaced counterbores and keeps tooling clear of adjacent components. Grip length and the mounting materials are useful purchasing details because they define the clamped stack as it heats.
Connection requirements
- Tapped-hole size, thread form, and effective engagement depth
- Head diameter, head height, and socket depth for drive engagement
- Load, thermal-cycling duty, and precipitation-hardened condition certification
Same socket head cap screw. Different material priorities.
A-286 material dataInconel 718 Socket Head Cap Screws
Inconel 718 socket head cap screws put precipitation-hardened strength into highly loaded, counterbored connections on heated test fixtures and compact machinery mounts. The internal drive reaches the screw between adjacent components. They are especially relevant when the hole pattern limits screw diameter and the drawing calls for high strength at the actual operating temperature.
Nimonic 80A Socket Head Cap Screws
Nimonic 80A socket head cap screws secure compact burner brackets and furnace support blocks carrying significant hot loads. Precipitation-hardened strength is useful in these small fasteners. The internal drive provides access between adjacent hardware without clearance for an external wrench.
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.
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 S66286 · heat number · ordered condition
- Final-part acceptance
- Lot-linked aging record and mechanical acceptance in the final condition.
- Dimensional record
- Thread gauges · Head and shank dimensions
- Traceability
- EN 10204 3.1 material certificate · production lot · identified packing
Build your A-286 socket head cap screw enquiry
Questions about A-286 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.