FAQ

Order online at locoscience.com. We're an online-only store with no storefront or local pickup.

Our website accepts credit cards. To pay by ACH or check, or to ask about payment terms, contact us.

Yes. Contact us and let us know you have a PO. We'll reply by email so you can attach it, then send you an invoice with a secure link to pay by credit card or ACH.

Contact us to ask about payment terms for your organization.

We don't run sales or sitewide discounts. First-time customers can get 10% off their first order through the chat on our website.

If you're ordering an unusually large quantity or want to set up recurring purchases, contact us with your part numbers and quantities.

Yes. Send us your part numbers, quantities and shipping address, and we'll email you a formal quote, usually the same business day.

Yes. Sign in to your account, open the order and download the invoice. If you checked out as a guest or paid by PO, contact us with your order or PO number and we'll email you a copy.

In-stock orders placed by 1 PM Pacific, Monday through Friday, ship the same business day. Orders placed after the cutoff, on weekends or on holidays ship the next business day. You'll get an email with tracking when your order ships.

Yes. Orders over $20 shipping within the contiguous US ship free by standard shipping. Orders under $20 ship for a flat $6.95. Orders to Alaska, Hawaii and Canada aren't eligible for free shipping and pay the actual shipping cost, calculated at checkout.

Free standard shipping goes by UPS Ground or USPS Ground Advantage, and we choose the carrier. Faster UPS options, such as Next Day Air and 2nd Day Air, are available at checkout.

Standard orders typically arrive within these business days after they ship from Eureka, California:

• 2–3 days: California
• 3–4 days: Arizona, Idaho, Nevada, New Mexico, Oregon, Utah, Washington
• 4–5 days: all other contiguous states and Washington, DC
• 5–6 days: Alabama, Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont

These are carrier estimates, not guarantees. Peak season (mid-November through early January) can add 1–2 days. If you need a firm delivery date, choose an expedited option at checkout.

Yes, if your order hasn't shipped yet. Contact us with your order number and we'll send you a payment link for the difference.

Yes. We have a daily UPS pickup and are happy to ship on your account. Send us your UPS account number, the billing ZIP code on the account and your preferred shipping speed.

Ground shipments (UPS Ground and USPS Ground Advantage) don't carry a delivery guarantee, so they aren't eligible for late-delivery refunds. Only UPS and FedEx Next Day Air shipments are guaranteed. If one of those arrives late, contact us and we'll file a claim with the carrier, who makes the final decision.

We don't currently offer drop shipping.

Yes. Contact us with the parts you need and your shipping address, and we'll send you a shipping quote.

Yes. Canada orders are placed directly on our website and pay the actual shipping cost, calculated at checkout.

Yes. Orders for countries other than Canada are placed directly with us rather than through the website, with a $100 minimum order. They ship by UPS or FedEx International, and customs duties and taxes are the buyer's responsibility. Contact us with the parts, quantities and destination country.

Yes, until it ships. In-stock orders placed by 1 PM Pacific ship the same day, so contact us as soon as possible.

Yes, as long as your order hasn't shipped. Contact us with your order number and the change.

Yes, as long as neither order has shipped yet.

No. Custom orders and their deposits are final once confirmed.

Unused items in their original packaging can be returned within 30 days of delivery. Contact us first for a Return Authorization (RA) number and write it on the outside of the package. Return shipping is the buyer's responsibility unless the item was defective or we sent the wrong item. Original shipping charges are non-refundable, and custom orders are final.

Returns over $250 have a 25% restocking fee. There's no restocking fee on exchanges.

Yes. Contact us and tell us what you need to exchange, then order the correct part on our website. We'll include a prepaid return label in your new package. Send the original part back with that label and we'll refund it once it arrives. The original part must be unused and in its original packaging.

Yes, as long as they're unused and in their original bag, even if the bag has been opened. Vacuum grease must be unused.

LoCo Science products carry a 30-day warranty against defects. Contact us with your order number, the part number and a short description of the problem. Products from other manufacturers carry the manufacturer's warranty.

Contact us within 30 days and we'll make it right at no cost to you.

Occasionally an item ships separately. Contact us with your order number and the missing part number and we'll look into it.

Our website won't let you order more than we have on the shelf. If an item ever comes up short after you order, we'll give you the choice of a backorder or a refund.

We only collect sales tax on orders shipping to California. Orders placed on locoscience.com that ship to any other state are tax free.

Orders placed through the Shop app are processed by Shopify as a marketplace, and state law requires Shopify to collect sales tax on them. To avoid this, order directly on locoscience.com.

Create an account on locoscience.com, then contact us. We'll reply by email so you can attach your tax exemption certificate, and once we have it we'll mark your account as tax exempt.

Yes. Contact us and we'll complete your vendor or onboarding forms and return them with our W-9. We can also help with documents such as certificates of compliance.

Contact us and we'll help you get back in or update the email address on your account.

Contact us with your order number and we'll help.

We specialize in high vacuum fittings: ISO-KF flanges, clamps, centering rings, adapters, reducers and bellows, plus vacuum tubing and vacuum grease. We don't carry pumps, freeze dryers, glassware, chillers or feedthroughs.

Yes. KF, NW and QF are all names for the same ISO-KF quick flange standard, so a KF-40 fits an NW-40 or QF-40.

Our stainless fittings, bellows and centering rings are 304 stainless steel. We don't currently offer 316. Clamps come in stainless steel or aluminum.

Yes. Our centering rings come with a Viton (FKM) O-ring installed.

Yes. Each clamp is sold as a set with a matching centering ring and O-ring.

We don't publish positive pressure ratings. KF flanges are designed for vacuum and aren't made for high pressure.

Hose barb sizes refer to the inside diameter of the hose they fit. For example, a 3/4" hose barb fits 3/4" ID hose. We recommend a hose clamp for a secure connection.

We don't carry one. One option is to pair a tri-clamp to NPT adapter with one of our KF to NPT adapters, which come in male and female NPT versions.

Our Apiezon products are sold in the sizes listed on our website. We don't break boxes down into smaller packs.

We have 2D PDF drawings for most parts. Contact us with the part number and we'll email one to you.

Often, yes. Send us your specs, quantity and shipping address for a quote. Custom orders require a deposit and are final once confirmed.

Eureka, California. We're a small, family-owned business, in business since 2017. More about us.

Our vacuum fittings and tubing are manufactured in China and shipped from our warehouse in California. Apiezon greases are made in the UK.

Chat with us on our website or send a message through our Contact page. Email is the fastest way to reach us.