A-286 Long-Shank Hex Bolts
ISO 4014 · ASME B18.2.1ASTM A638 — bar / forgings
A-286 long-shank hex bolts for heated machinery and deep fixture stacks, with aged strength and a controlled plain grip through the clamped components.
- 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
A-286 in this connection
An iron-based precipitation-hardening alloy for high-strength connections operating at elevated temperature.
- Connection
- Heated machine fixtures & thick clamp assemblies
- Critical dimensions
- Plain grip · thread runout · under-head length
Which standard is on your order?
Raw Material Specifications
Finished-Bolt 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
Forms & dimension guide
Plain grip section
Use across thick equipment flanges, spacers and mounting stacks where the grip requires a continuous plain shank. The grip length keeps the threaded transition beyond the intended bearing or shear section.
Threaded end
Allow enough usable thread beyond the stack for the nut, washer and tightening travel. Too little thread can leave the nut bottomed on the plain shank before the joint is clamped.
Long shank vs shoulder screw
For a pivot or locating bore, specify the actual shank diameter tolerance and surface finish. A long-shank bolt provides grip length; a shoulder-screw fit requires separate control of the locating surface.
- Product forms
- Long plain grip · Stepped grip — drawing
- Dimensional control
- Plain grip · thread runout · under-head length
- Manufacturing
- Turn sample grips from bar. Form headed blanks for production quantities, then finish the long shank, transitions and thread while controlling straightness.
- Final condition
- Solution treatment and aging are tied to the ordered class and strength, with the heat-treatment lot traceable to the fasteners.
- Inspection
- Heat-treatment class · tensile / hardness · specified stress-rupture tests
Where A-286 fits — and what matters
Industrial Machinery & Automation
Machine frames and positioning fixturesA-286 long-shank hex head bolts pass through the deeper grip of machine frames and positioning fixtures; the extended plain shank locates the joint before the nut takes up the thread. Alignment, operating cycles and replacement access define the working interface.
Furnaces & Heat Treatment
Heat-treatment fixturesA-286 long-shank hex head bolts pass through the deeper grip of heat-treatment fixtures; the extended plain shank locates the joint before the nut takes up the thread. Hot dwell, thermal expansion and repeated furnace cycles set the working load.
Power & Turbines
Boiler-duct supports and hot auxiliary bracketsA-286 long-shank hex head bolts pass through the deeper grip of boiler-duct supports and hot auxiliary brackets; the extended plain shank locates the joint before the nut takes up the thread. Hot dwell and start-stop expansion act on the supported or moving component.
Same long-shank hex head bolt. Different material priorities.
A-286 material dataInconel 718
Precipitation hardening gives 718 its high strength; its specified condition is central to loaded and hot-service joints.
Inconel 718 Long-Shank Hex BoltsInconel 625
Molybdenum and niobium provide solid-solution strength, combined with resistance to chloride pitting and crevice corrosion.
Inconel 625 Long-Shank Hex Bolts310S
High chromium and nickel support oxidation resistance in furnace atmospheres; long loaded service also depends on creep behaviour.
310S Long-Shank Hex BoltsFrom drawing to documented delivery
- 01Drawing & BOMGrade, condition and part dimensions
- 02Sample lotOptional · typically ~20 days
- 03Production & testingTypically 25–35 days
- 04Documents & dispatchHeat-linked lots and packing
Connection & acceptance
Heated machine fixtures & thick clamp assemblies: Fixture temperature · grip length · runout location · cyclic load.
Material & final condition
Solution treatment and aging are tied to the ordered class and strength, with the heat-treatment lot traceable to the fasteners.
Connection inspection
Plain grip · thread runout · under-head length. Heat-treatment class · tensile / hardness · specified stress-rupture tests.
Build your A-286 long-shank hex head bolt enquiry
Upload drawing insteadQuestions about A-286 long-shank hex head bolts
Which dimensions matter beyond overall bolt length?
Under-head length, plain-grip length, thread length and under-head radius locate the bearing and threaded interfaces. The finished aged condition and grip dimensions are recorded on the same part drawing.
Technical references & photo credits
Catalogue photography shows product form. Application examples connect alloy properties to equipment duties; they are not customer installation records. Quantities, schedules and the inspection scope are confirmed in the quotation.