Typical MOQ
10pieces
Subject to product and material review.
Conditions
MOQ is typically 10 pieces, subject to product, material and manufacturing-route review.
Inconel 625 Hex Bolts — ASTM F468 / F468M
MaterialInconel 625Change · 45 grades
Inconel 625 hex head bolts in UNS N06625. Send a drawing or define diameter, under-head length, thread and quantity. Add the annealed or solution-treated condition and the corrosion exposure for your enquiry.
- Material
- Inconel 625 · UNS N06625
- Material focus
- Corrosion resistance · corrosion-fatigue strength · oxidation resistance
- Common applications
- Seawater equipment · chemical-process valves & heat exchangers
- Main elementsComposition limits · wt.%
- Ni ≥58%
- Cr 20–23%
- Mo 8–10%
- Nb + Ta 3.15–4.15%
Standards & threads
Finished boltASTM F468 — inch / ASTM F468M — metricInconel 625 · N06625 · select the unit-specific specification
Confirm final mechanical acceptance and the required melt route. The reviewed F468M sample requires ESR or VAR for 625; verify that requirement against the ordered edition. F468M scope is M6–M36; this is a standard boundary, not a stock range.
Do not assume B446 bar alone qualifies a bolt to F468/F468M. Inch and metric editions must be checked independently, including processing requirements.
Raw material specificationASTM B446UNS N06625
N06625 · rod and bar
Specify the B446 material grade and annealed or solution-treated condition. Keep starting-stock requirements separate from the finished part.
Dimensions · metricISO 4014 / ISO 4017Coarse pitch · partial-thread bolts / full-thread hex screws
Dimensions · inchASME B18.2.1Inch hex bolts / hex cap screws
Select the bolt or cap-screw pattern, head dimensions and thread length. Hex and heavy hex are different choices.
Threads · metricISO 261 / ISO 965-1Metric M · pitch plan and tolerance system
Threads · UNC / UNFASME B1.1Unified inch · coarse / fine series
State diameter, TPI, series and external class: e.g. 1/2-13 UNC-2A or 1/2-20 UNF-2A. Select 2A / 3A with the mating-thread fit; UNC and UNF do not mate.
Heat treatment / conditionSolution treated
Reference specimen: Rod, bar & plate · Up to 101.6 mm
Reference condition from material data. The ordered condition is agreed in your quotation.
Sources & editions Reviewed 2026-10-19
Historical samples support the stated grade coverage. The ordered edition controls the full requirements.
Preview your dimensions
Example dimensions, not a stock size.
Simplified right-hand thread appearance. No tolerance, fit or standard compliance is simulated.
Head dimensions · optional
Head proportions are illustrative: s = 1.5d, k = 0.625d. They are not standard-table values and will not be submitted as specified dimensions.
Quality documents
Heat number traceability
Every delivery traceable by heat number
Mechanical testing
Included with every delivery
Thread inspection
GO / NO-GO gauging · sampled inspection
Methods, sampling and acceptance criteria follow the agreed specification. PMI, third-party inspection and additional records are agreed separately.
Before production and at delivery
During quotation, a redacted certificate from a previous order can show the document format and recorded tests. It is a historical example, not certification of this product or a new order. Shipment documents must correspond to the material and batch actually supplied.
How to read a historical certificate sample ↗Prepare your enquiry
Send a drawing and quantity.
No drawing? Use these details.
- Size
- d × L Diameter × under-head length
- Quantity
- Pieces Required quantity per size
- Thread
- Metric / UNC / UNF Pitch or TPI + thread class
- Coverage
- Full / Partial For partial, include threaded length
Full material checklist
Environment
Medium, concentration, operating temperature, continuous / intermittent exposure and relevant cleaning conditions.
Focuses corrosion review on the actual joint, including crevices and mating materials.
Condition & specification
UNS N06625, starting-material specification and condition, governing finished-bolt specification and edition, and final acceptance requirements.
Connects the raw material certificate to the properties required after manufacture.
Assembly & inspection
Mating nut or tapped-hole grade, thread class, finish / lubricant and required test records.
Thread fit, assembly practice and inspection scope need agreement alongside the alloy.
Example enquiry — adapt to your drawing
Please quote Inconel 625 hex bolts, UNS N06625, to drawing [number/revision], or diameter [value/unit] × under-head length [value/unit], quantity [pieces per size]. Thread: [designation/class]; coverage: [full/partial]; for partial threading, threaded length [value/unit]. Required material condition: [condition or drawing reference]. Service medium, concentration and temperature: [details]. Exposure pattern and relevant cleaning conditions: [details]. Please identify the proposed finished-bolt specification and inspection documents in the quotation.
Replace the brackets with your requirements, or send your drawing instead. If a condition or specification is undecided, flag it for review. This is an enquiry example; dimensions, availability, price and acceptance requirements are confirmed in the quotation and purchase documents.
Commercial terms
Indicative terms; confirmed in your quotation.
Sample review
~20days
Freight, import duties and taxes are separate.
Conditions
Samples are typically reviewed on an approximately 20-day basis. BYBOLT may cover agreed sample manufacturing; buyer freight, import duties and taxes remain separate.
Production review
25–35days
Urgent requirements can be discussed.
Conditions
Regular production is commonly reviewed on a 25–35 day basis. Urgent requirements can be discussed against the complete specification.
Typical deposit
30%
T/T or LianLian. Balance before dispatch.
Conditions
Payment can be arranged by T/T or LianLian. A typical order uses a 30% deposit, with the balance completed before dispatch.
Technical help
Should my 625 bolt order cite B446, F468 or F468M?
A B446 certificate covers starting-stock requirements; it does not by itself establish finished-bolt conformity. F468 is an inch finished-fastener route and F468M is the metric route within its scope. State the governing edition and required final properties. For a metric order, confirm any required electroslag remelting (ESR) or vacuum arc remelting (VAR) against the specified F468M edition.
Which 625 material condition belongs on the enquiry?
State the B446 grade and annealed or solution-treated condition required by the drawing or design. Add the final bolt properties and any specified corrosion test. If the condition is undecided, send the dimensions, quantity and service details for review before quotation.
Can 625 replace 718 because both are Inconel alloys?
A substitution needs a review of the corrosion exposure, required strength, temperature and condition. 625 is solid-solution strengthened; 718 is age hardenable. Matching the trade-name family or bolt dimensions does not establish equivalent joint performance. Use the 625 vs 718 guide below to prepare that comparison.
Can I request these bolts without a drawing?
Yes. Start with diameter, under-head length, thread designation and quantity per size. Add full or partial threading, the threaded length for a partial thread, and the required material condition. Include the service details listed above; identify any missing requirements for review before order confirmation.
Read a thread designation Metric / UNC / UNF
M12 × 1.75–6g12 mm diameter · 1.75 mm pitch · external class 6g
1/2-13 UNC-2A1/2 inch · 13 TPI · coarse · external class 2A
1/2-20 UNF-2A1/2 inch · 20 TPI · fine · external class 2A
Examples explain designations, not available sizes. Specify fine pitch explicitly. UNC and UNF do not mate; full or partial threading is a separate choice.
Thread classes and inspection ↗Related material guides
Start with the corrosion exposure
625 is a nickel-chromium-molybdenum alloy strengthened by solid solution. For chemical or marine service, give the medium, concentration, temperature and exposure pattern. A general corrosion-resistance description cannot establish suitability for the particular joint.
How to specify Inconel 625 fasteners ↗State the condition, not only “625”
Annealed and solution-treated material are different ordering conditions. Select the condition with the applicable material specification and finished-bolt requirements. ASTM B446 addresses rod and bar; it does not define every requirement for a finished hex bolt.
Inconel 625 composition, conditions & properties ↗INCONEL is a Special Metals trademark. Specify a required producer explicitly; the trade name is not a source guarantee.
Download the PO and receiving checklist (PDF)
Guides for your enquiry
Specify your Inconel 625 bolt
Send a drawing or add your dimensions and quantity.
Continue to enquiry ↗
Combine several products in one enquiry
Inconel 625 hex boltsEnquire ↗