Inconel 625 12-Point Flange Bolts
ASME B18.2.5M · component drawingASTM B446 — rod / bar
Inconel 625 12-point flange bolts for compact pressure-equipment joints where external socket access and chloride-corrosion resistance are both important.
- MOQ
- 100PCS
- Samples · typical
- ~20 days
- Production · typical
- 25–35 days
- Heat treatment
- Annealed / solution annealed
EN 10204 3.1 MTC + heat-number traceability
Inconel 625 in this connection
Molybdenum and niobium provide solid-solution strength, combined with resistance to chloride pitting and crevice corrosion.
- Connection
- Valve bodies & compact process-equipment closures
- Critical dimensions
- Wrenching size · flange diameter · under-head radius
Which standard is on your order?
Raw Material Specifications
Finished-Bolt Specifications
Threads · Metric
Threads · Inch
Dimension Reference
Heat Treatment
Annealed or solution annealedFor B446 stock, Grade 1 is annealed and Grade 2 is solution annealed; the higher-temperature solution treatment supports creep resistance rather than age hardening.
What we can make in Alloy 625
Forms & dimension guide
Fully threaded / Partially threaded
The difference is the plain shank. Fully threaded bolts have threads along the shank up to the head transition; partially threaded bolts retain an unthreaded grip section beneath the flange.
External head / Internal recess
The difference is where the tool engages. An external 12-point head is gripped around its outside by a matching socket. An internal spline recess is driven by a bit inserted into the head. These are different drive structures and should not be specified interchangeably.
- Product forms
- Metric 12-point pattern · Inch drawing pattern
- Dimensional control
- Wrenching size · flange diameter · under-head radius
- Manufacturing
- CNC-machine short runs; form production blanks by the selected heading or forging route. Finish the double-hex drive, bearing flange and threads to the equipment drawing.
- Final condition
- Annealing or solution annealing follows the ordered B446 grade and finished-fastener requirements.
- Inspection
- Heat traceability · final condition · finished-part mechanical and dimensional records
Where 625 fits — and what matters
Oil & Gas
Utility skids and instrument supportsInconel 625 12-point flange bolts fasten utility skids and instrument supports where a 12-point socket gives useful indexing around restricted equipment access. The flange supports the loaded head seat. Utility connections and pressure-boundary parts have separate acceptance requirements on the equipment drawing.
Pumps, Valves & OEM
Actuator mounts and pump baseplatesInconel 625 12-point flange bolts fasten actuator mounts and pump baseplates where a 12-point socket gives useful indexing around restricted equipment access. The flange supports the loaded head seat. Repeated maintenance makes fit, engagement and access part of the component specification.
Chemical Processing
Mixer drives and process-equipment bracketsInconel 625 12-point flange bolts fasten mixer drives and process-equipment brackets where a 12-point socket gives useful indexing around restricted equipment access. The flange supports the loaded head seat. Process liquid can remain at the contact after the exposed surface drains.
Same 12-point flange bolt. Different material priorities.
Inconel 625 material dataInconel 718
Precipitation hardening gives 718 its high strength; its specified condition is central to loaded and hot-service joints.
Inconel 718 12-Point Flange BoltsHastelloy C-276
A nickel-chromium-molybdenum-tungsten alloy for severe process corrosion, including reducing acids and wet-chlorine environments.
Hastelloy C-276 12-Point Flange BoltsSuper Duplex 2507
High chromium, molybdenum and nitrogen support resistance to chloride pitting, alongside high duplex-stainless strength.
Super Duplex 2507 12-Point Flange BoltsMonel K-500
Nickel-copper corrosion resistance is combined with precipitation-hardened strength for loaded marine and pump components.
Monel K-500 12-Point Flange 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
Valve bodies & compact process-equipment closures: Process medium · socket envelope · head-seat contact.
Material & final condition
Annealing or solution annealing follows the ordered B446 grade and finished-fastener requirements.
Connection inspection
Wrenching size · flange diameter · under-head radius. Heat traceability · final condition · finished-part mechanical and dimensional records.
Build your 625 12-point flange bolt enquiry
Upload drawing insteadQuestions about 625 12-point flange bolts
Can the same torque be used as for a 625 hex bolt?
Head form, bearing diameter, lubrication and thread engagement affect the torque-to-preload relationship. Use the assembly procedure for this joint rather than transferring a value based only on the alloy.
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.