Typical MOQ
10pieces
Subject to product and material review.
Conditions
MOQ is typically 10 pieces, subject to product, material and manufacturing-route review.
Incoloy 800H Hex Bolts
MaterialIncoloy 800HChange · 45 grades
- Material
- Incoloy 800H · UNS N08810
- Material focus
- Creep & rupture resistance
- Common applications
- Furnace components · petrochemical-process equipment
- Main elementsComposition limits · wt.%
- Ni 30–35%
- Cr 19–23%
- Fe ≥39.5%
- C 0.05–0.10%
Standards & threads
Finished boltDrawing-defined acceptanceNo grade-specific finished-bolt specification was established in the reviewed sources.
Define finished-bolt acceptance and, where required, creep / rupture test conditions and duration. Stock grain-size evidence does not determine joint allowable load.
B408 covers this stock grade, but the 800, 800H and 800HT designations are not interchangeable. No F2281 classification is assigned from the family name.
Raw material specificationASTM B408UNS N08810
N08810 · rod and bar
Controlled grain size, heat-treatment record and required creep / rupture evidence; chemistry alone is not the complete 800H purchase basis.
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.
Mechanical testing ASTM F606/F606M
Mechanical test methods for fasteners; select applicable tensile, yield and hardness tests. This standard supplies methods, not a material grade or pass/fail limits. Define those limits and sampling in the part specification.
Test-method reference ↗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
Chemistry and grain size
N08810, applicable carbon limits and grain-size acceptance / report.
Addresses controls that distinguish 800H from base 800.
Sustained loading
Service temperature, load duration and specified creep / rupture criteria.
Defines the evidence required for long-duration hot service.
Certification scope
Material treatment and certificate designation; any dual-certification requirement.
Prevents an unsupported assumption of 800HT equivalence.
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
What distinguishes an 800H bolt enquiry from an 800 enquiry?
Specify N08810 and the required B408 condition, including controlled grain size and heat-treatment evidence. These details support the high-temperature material basis and should remain traceable to the finished bolt lot.
Which tests should I name for sustained-load 800H bolts?
State the final mechanical acceptance and any design-required creep or rupture tests, including temperature, stress and duration. Stock chemistry and grain-size records are part of the evidence; the joint loading still needs its own design basis.
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
Download the PO and receiving checklist (PDF)
Guides for your enquiry
Specify your Incoloy 800H bolt
Send a drawing or add your dimensions and quantity.
Continue to enquiry ↗
Combine several products in one enquiry
Incoloy 800H hex boltsEnquire ↗