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custom rubber gaskets sample and approval

A custom rubber gaskets sample is an acceptance object, not a marketing coupon. Check the outline, Shore A, thickness and the named ASTM or equivalent method before you approve it. Later production lots are compared with that approved item.

Unapproved gasket blank
Before approval: a blank is only a candidate
Marked approved gasket sample
After approval: the tagged item is the record

Write the acceptance condition before the sample ships

This layout helps you phrase one line. It does not calculate a price, a discount, or a carbon saving.

What to check on a custom rubber gaskets sample
Check Record so a later batch can be compared
Outline ID/OD or drawing revision used on the sample tag
Thickness in or mm measured on the approved piece
Shore A Value and scale confirmed on that piece, not a family range
Compound / ASTM Method and condition written on the acceptance card
Documents Lot file that names this configuration; keep the original request beside it

Worked approval situations

Hardness drifted on the production lot

The sample was 70 Shore A NBR. The lot arrived without a Shore A line. Re-issue the request; do not accept a plant ISO letter as the hardness record.

Factory offered a TPE stand-in

A thermoplastic elastomer can cut cycle time, but compression set and continuous heat above about 120°C still belong to vulcanized rubber. Treat the TPE piece as a new request.

Food-contact file named the company, not the lot

FDA 21 CFR 177 or NSF language has to name the grade and the lot on the approved item. Return a company-only letter.

Send the sample split with the production quantity

  • How many pieces are for approval
  • Which ASTM or equivalent point is the gate
  • Where the later lot will be compared

Write compound, thickness, ID/OD or drawing, Shore A, temperature with medium, 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.