Standards & threads

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

Specify stabilization / thermal-history requirements and finished-bolt tensile / hardness acceptance.

316Ti bar has A276/A479 references. A240 concerns flat products; neither reference alone qualifies the bolt.

Raw material specificationASTM A276/A276M / ASTM A479/A479MUNS S31635

S31635 · stainless bar

Specify the exact grade, stock condition and product form. Bar acceptance must be distinguished from plate or tube data.

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.

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

Stabilized identity

S31635 and the required stabilized material condition.

Distinguishes 316Ti from 316L and from titanium alloys.

Thermal exposure

Relevant service temperature, heating duration and fabrication history.

Explains the stabilization requirement for the actual application.

Stock / bolt specification

S31635; A276/A276M or A479/A479M bar, final condition and bolt acceptance limits.

Separates the bar certificate from finished-bolt condition and 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

Is A240 the right stock specification for 316Ti bolts?

A240 concerns plate, sheet and strip. Producer data confirms A276/A276M and A479/A479M bar references for S31635. Specify the applicable bar route and final bolt acceptance so the certificate matches the product form.

Can a 316L fastener classification be used for 316Ti?

316Ti is the titanium-stabilized S31635 grade. The reviewed 316/316L F593 group does not establish coverage for it. Identify the stabilization or thermal-history requirements and the finished-bolt mechanical limits explicitly.

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 316Ti bolt

Send a drawing or add your dimensions and quantity.

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316Ti hex boltsEnquire ↗
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