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o ring kit

O-Rings Sourcing turns an o ring kit request into one specification list so several factories can quote on the same basis. A kit is not five loose rings in a photo. It is a named set of sizes, compounds and quantities, plus packing that will appear on the invoice. We do not hold kit inventory or publish a kit price.

Request Factory Quotes
Labeled o-ring kit compartments beside a written size list

What goes into an o ring kit request

Each compartment needs a size standard, compound and quantity. If two factories fill missing dash sizes themselves, the kit quotes cannot be laid side by side.

Size map

List every dash size or ID/OD/CS. A “standard assortment” without a map is not a comparable kit.

  • AS568 dashes
  • Metric CS
  • Count per size
  • Spare empty slots
Request Datasheet

Compound mix

State whether the kit is all NBR or mixed NBR/FKM/silicone/EPDM. Mixed kits need a color or label rule.

  • Single compound
  • Mixed compounds
  • Color code
  • Label language
Compare Grades

Packing

Box, tray, bag or reel. Kit freight changes when the tray is plastic versus cardboard even if the rings match.

  • Tray type
  • Export carton
  • Pallet count
  • Label fields
Request Datasheet

Documents

Ask for the lot file that covers the rings in the kit, not a plant ISO certificate used as a stand-in.

  • Dimensional report
  • Compound declaration
  • ASTM method
  • Sample first lot
Compare Grades

Cost lines commonly excluded from an o ring kit quote

Ask for these lines in writing. A lower piece price that hides plates, trays or freight is a different deal.

Same-basis checks when two factories answer a kit differently
Thermal Chemical Mechanical Compliance
Service temperature in F or C named per compound Medium: oil, fuel, water, steam or air Shore A the supplier must confirm ASTM D2000 or equivalent cited on the line
Low-temperature flexibility ask if the kit ships north FKM vs NBR swell if fuels are present Compression set method and hours REACH / RoHS on the quoted lot
Heat-age hours if the buyer asked for them Food-contact file only for the silicone sizes that need it ID/OD tolerance class IATF 16949 only when the receiving plant requires it

When two suppliers report different Shore A values for the same dash size, treat that as two configurations. Re-issue the line instead of averaging hardness.

Files this desk asks factories to attach

  • Dimensional page

    ID, OD and cross-section for each kit size, or the AS568 dash table the factory used. A brochure photo is not a dimensional page.

  • Compound declaration

    Named polymer, Shore A and the ASTM or equivalent method. A company ISO 9001 certificate does not replace this line.

  • Lot-level regulatory file

    REACH, RoHS, FDA 21 CFR 177 or NSF 61 only when the buyer asked, and only for the grade and lot quoted.

Send one o ring kit list to several factories

We will keep the buyer wording, then append optional budget and preference only after the form validates.

  • Size map and count per compartment
  • Compound mix and Shore A confirmations
  • Destination and sample / production split
  • Documents that must travel with the lot

Write size standard, compound, hardness and temperature; quantity with unit; destination state or postal code and requested delivery / lead time; required product documents and sample needs. Optional target budget with currency and unit or whole-order basis; optional supplier preference. Drawings can be sent after we reply; this form has no upload field.