Inconel 718 Socket Head Cap Screws
ISO 4762ASTM B637
Inconel 718 socket head cap screws pair a precipitation-hardened nickel-chromium alloy with a compact, tapped assembly form for high-load, space-constrained joints. The alloy retains strength and resists relaxation under sustained heat and vibration.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Solution treated / 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; aged when specifiedSolution treatment prepares 718 for forming or machining, and subsequent aging develops the strength required by the ordered condition.
What we can make in Alloy 718
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 · 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 718 fits — and what matters
Precision rotary tables & spindle mounts
Inconel 718 Socket Head Cap ScrewsA highly loaded spindle or rotary-table mount can call for Inconel 718 socket screws when the drawing demands high strength within a small bolt circle. The cylindrical heads sit in counterbores, leaving the mounting face clear of projecting hex heads. This is a strength-led choice for a constrained joint, especially on heated fixtures or test equipment.
Connection requirements
- Tapped-hole size, thread form, and effective engagement depth
- Head diameter, head height, and counterbore clearance required
- Load, vibration duty, and age-hardened condition certification
Heated powertrain & battery test rigs
Inconel 718 Socket Head Cap ScrewsHeated test fixtures expose their mounting screws to both fixture loads and repeated heating cycles. Inconel 718 provides precipitation-hardened strength for these compact joints. The socket head lets technicians reach recessed mounting positions without removing surrounding test hardware, which is often the practical reason to choose this screw form.
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 age-hardened condition certification
High-speed robotic arms & linear gantries
Inconel 718 Socket Head Cap ScrewsInconel 718 socket screws are an option for heavily loaded robot-tool or gantry interfaces whose fastener diameter is constrained by the mounting pattern. Their aged strength puts load capacity into a small screw, while the internal drive gives access between adjacent components. The case for 718 is strongest at interfaces with a defined high-strength or elevated-temperature requirement.
Connection requirements
- Tapped-hole size, thread form, and effective engagement depth
- Head diameter, head height, and counterbore clearance required
- Vibration and reversing-load duty, and age-hardened condition certification
Same socket head cap screw. Different material priorities.
Inconel 718 material dataA-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.
Inconel X-750 Socket Head Cap Screws
Inconel X-750 socket head cap screws combine hot-strength properties with axial access for compact exhaust brackets and burner mounts. Their precipitation-treated condition is selected for the operating duty. The internal drive suits loaded attachments with little wrench clearance around the head.
Inconel 625 Socket Head Cap Screws
Inconel 625 socket head cap screws fit compact seawater housings and wet-process covers where liquid can remain beneath the head or inside the drive. Chloride pitting and crevice-corrosion resistance supports these exposed fastening points. Axial access suits recessed mounts between adjacent fittings.
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 N07718 · 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 718 socket head cap screw enquiry
Questions about 718 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.