Standards & threads

Finished boltDrawing-defined acceptanceNo grade-specific finished-bolt specification was established in the reviewed sources.

Define finished-bolt tensile / yield / hardness acceptance and any corrosion-test requirements for the named process exposure.

B649-26 continues to identify N08926. Do not copy the 904L transfer note onto 926 or substitute S31254 without agreement.

Raw material specificationASTM B649UNS N08926

N08926 · bar and wire

Identify N08926 and solution-treated / worked condition as applicable; a generic 6Mo designation is insufficient.

Dimensions · metricISO 4014 / ISO 4017Coarse pitch · partial-thread bolts / full-thread hex screws

Select head width s, height k and thread length b. These are dimensional references here; other alloys do not automatically conform to the full steel/stainless product standard. Fine-pitch geometry needs a separate drawing or applicable standard.

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

State diameter × pitch and external tolerance class, e.g. M12 × 1.75–6g. Fine pitch must be written explicitly; 6g is a thread tolerance, not a strength grade.

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 annealed

Reference specimen: Bar · ≤300 mm

Reference condition from material data. The ordered condition is agreed in your quotation.

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.

Thread coverage
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

Material certificate

MTC · EN 10204 3.1 included

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

Exact 6Mo identity

N08926 and the governing bar / wire material reference.

Distinguishes 926 from other grades sold under a 6Mo description.

Exposure and section

Chlorides, temperature, crevice conditions and nominal bolt section.

Sets the basis for reviewing the selected solution-annealed material.

Final acceptance

Condition evidence, mechanical requirements and specified corrosion tests.

Keeps flat-product data separate from bolt acceptance.

Commercial terms

Indicative terms; confirmed in your quotation.

Typical MOQ

10pieces

Subject to product and material review.

Conditions

MOQ is typically 10 pieces, subject to product, material and manufacturing-route review.

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

Does the 904L change to B649 also remove Alloy 926?

B649-26 continues to identify N08926. Its transfer note for N08904 concerns 904L. Keep the exact UNS on the purchase documents instead of applying one grade’s specification change to all 6Mo alloys.

Can 254 SMO be quoted as an equivalent to Alloy 926?

Any substitution needs a review against the original requirements. N08926 and S31254 are different identities. Compare their specified condition, mechanical acceptance and process exposure while retaining the same drawing and inspection scope.

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 Alloy 926 bolt

Send a drawing or add your dimensions and quantity.

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