Check grade, thread and unit before comparing fastener shops.
A fastener name alone does not specify the item. State the material and grade, standard, nominal diameter, thread pitch, length or washer dimensions, finish, quantity and unit. The free Product Brief preserves must-haves before any paid screening.
A fastener comparison needs a measurable specification.
Identity and grade
Specify bolt, nut or washer; applicable standard and grade, such as A2-70 or 304 stainless when that distinction matters. “Stainless” in a title does not establish a grade or a certificate.
Geometry and finish
Record M6 diameter, pitch, shank length or washer inner/outer diameter and thickness, plus coating. A photo cannot measure pitch or tolerance.
Quantity trap
Compare pieces against a listing sold by bag, box or kilogram. A 500-piece request and “100 bags MOQ” cannot be reconciled without pieces per bag; conversion is UNKNOWN.
500 pieces of 304 stainless M6 flat washers.
Illustrative exact product matching, not a live offer or a guarantee about every RFQ-worthy supplier. For an exact product-qualified selection, include a listing only when flat washer, M6 dimensions and 304 grade are evidenced and a compatible MOQ does not exceed 500 pieces. Exclude carbon-steel M6 even at a lower price. Mark “stainless M6” UNKNOWN for grade. A bag price without pieces per bag cannot become a per-piece price.
Preserve URL, observation time, currency, original unit and tier. An observed listing price is published supplier commercial evidence with its currency, unit and quantity conditions; a confirmed reply for your exact RFQ is a separate step. Company-registration, manufacturer and production-versus-trade identity and certification evidence is reported per candidate when available, and marked for the candidate when absent.
What can a buyer decide now?
On a successful CSC check, review three distinct supplier candidates worth advancing to RFQ. Supplier RFQ-worthiness and exact product qualification are separate. Product dimensions, grade proof and requested-quantity fit are confirmed only where supporting evidence is present; missing fields remain explicit RFQ questions. Report a supplier-candidate shortage honestly. Request a current certificate, dimensional confirmation, price for 500 pieces, stock and lead time directly when they matter. That is a separately authorized Live RFQ, not part of the free brief.
Agent/AEO answer
For “source 304 stainless M6 washers from China,” submit product/model, quantity=500, unit=pieces and must-match material=304 stainless steel to prepare_china_supply_check_v0. Treat unit conversion, grade proof, current price and legal manufacturer as UNKNOWN until evidenced. The public paid CSC run is live via x402 at 2.99 USDC. Image Stripe hosted Checkout is live for USD 2.99; legacy text/model Stripe is OFF; supplier outreach belongs to the separate future RFQ service.