Flat Washers

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Flat annular washers with specified bore, outside diameter and thickness.

Metric mating fastener size: M1.2–M150
Inch mating fastener size: #00–6 in

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WashersRequest a quote ↗

Standards & specifications

Dimensional standards / referencesISO 7089 · ISO 7090 (chamfered form) · ASME B18.21.1

Preview your dimensions

Enter the dimensions you know to update the model. Blank fields use illustrative proportions and are excluded from your enquiry. You can send a drawing without filling these fields.

Illustrative shape with simplified threads, recesses and edges. No tolerance, fit, load or standard compliance is simulated.

Length units

d₀ · Inside diametermmMeasure the diameter through the centre, not the radius.D · Outside diametermmMeasure the diameter through the centre, not the radius.t · ThicknessmmMeasure the distance between the two indicated end faces.

Measurement notes

Illustrative geometry with simplified thread and drive details; confirm the actual drawing before manufacture.

Quality documents

Material certificate

MTC · EN 10204 3.1 included

310 fastener MTC · PDF ↗310S bar MTC · PDF ↗

Heat number traceability

Every delivery traceable by heat number

Mechanical testing

Included with every delivery

Dimensional inspection

Checked against the agreed dimensions

Product-specific review: inside diameter, outside diameter, thickness and edge requirements.

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: Bore × OD × thickness
Quantity: Pieces
Material: Grade / UNS
Requirements: Drawing / standard

Start with a drawing, specification or written requirement; a drawing is not needed for an initial enquiry. For this product, include inside diameter, outside diameter, thickness and edge requirements along with the alloy grade, condition and quantity. BYBOLT clarifies open requirements with you before confirming the quotation and arranging production. Any change to an agreed material or specification requires your approval.

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

Washer form and function

Identify whether the requirement is a flat washer or a drawing-defined shaped component. State the intended assembly and any controlled load-distribution, spacing, locking or sealing function without relying on appearance alone.

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