603 Manufacturing does not publish a warranty, return, or shipping policy on its website. As of October 2026, 603manufacturing.com redirects to 603mfg.com, and neither address has a warranty page, a returns page, or a shipping page.
That’s because 603 Manufacturing is a contract manufacturer. It builds custom parts to each customer’s drawings, so the warranty, return, and delivery terms are set order by order in the quote, the purchase order (PO), and the order acknowledgement. If you need those terms, the person to ask is your sales contact.
Here’s what the company does publish, what it doesn’t, and what to pin down before you place an order.
Who is 603 Manufacturing, and why is there no store-style policy?
603 Manufacturing is a cable and electronics assembly maker in Hudson, New Hampshire. It opened in 1998, joined Trexon in July 2023, and today operates as part of Trexon, an Amphenol company.
It builds four main things:
- Cable assemblies and complex wiring harnesses
- RF cable assemblies, both semi-rigid and flexible
- Electro-mechanical box builds (finished enclosures with wiring, panels, and parts inside)
- Engineering packages, such as drawings and work instructions
Its customers are space, aerospace, defense, medical, and industrial companies. There’s no online store, no shopping cart, and no list prices. Every job starts with a quote request.
That business model explains the missing policy. A retail brand sells the same product to thousands of people, so one public return policy makes sense. A build-to-print shop makes a part that may fit only one customer’s system. A blanket 30-day return window wouldn’t work, because an unused custom harness usually can’t be resold to anyone else.
What does the website publish?
The site covers what 603 builds and how it checks quality. It doesn’t cover the commercial terms of a sale.
| Topic | On 603mfg.com? |
|---|---|
| Products and capabilities | Yes |
| Certifications (AS9100, ISO 9001, ITAR, IPC/WHMA-A-620) | Yes |
| Testing methods | Yes |
| Quote request form and contact details | Yes |
| Product warranty | No |
| Return or RMA policy | No |
| Shipping rates, carriers, or delivery terms | No |
| Terms and conditions of sale | No |
The testing details matter for warranty questions later. Wire harnesses and cable assemblies get 100% electrical testing, including continuity, hi-pot (a high-voltage insulation check), and insulation resistance. RF assemblies ship with test data on every unit, and box builds are tested against the customer’s own acceptance test procedure. Every assembly is traceable, and the full list of standards and tests is on the company’s FAQ page.
What does the QF106 terms document cover?
QF106 is the one terms document 603 Manufacturing has posted online, and it applies to the company’s own suppliers, not to its customers. Its full title is Terms and Conditions of Purchase, and the latest version is Revision C, dated January 12, 2022.
It sets the rules for vendors that sell parts and services to 603. A few points touch on shipping and returns:
- Packages that arrive more than one week before the due date are refused unless 603 staff approve them.
- Suppliers shouldn’t insure shipments unless a 603 representative asks them to.
- Suppliers must not ship nonconforming (out-of-spec) product without written approval from 603.
- Records tied to each PO must be kept for at least seven years.
- Printed circuit boards must be packed to control moisture, with no foam packing peanuts.
The document still lists the old address, 21 Park Avenue in Hudson. The company now sits at 46 River Road. If you buy from 603, QF106 doesn’t set your warranty or return rights. It does show how strict the shop is about late, early, and out-of-spec deliveries, which is a fair hint at the standard it works to.
How does warranty work for a custom cable assembly?
The warranty for a 603 Manufacturing order is whatever your quote, PO, and order acknowledgement say. There’s no standard published period.
In contract manufacturing, a warranty almost always covers workmanship: the build quality of the crimps, solder joints, routing, and labeling. It usually doesn’t cover a design problem in your own drawing, because the shop built exactly what you specified. Parts you supply yourself (a consignment build) are often handled differently from parts the shop buys.
So before you sign off, get these points in writing:
- How long the warranty lasts, and whether it starts at shipment or at delivery
- Whether it covers workmanship only, or materials too
- How consigned parts are treated
- What the fix is: repair, replace, or credit
- Who pays freight on a warranty return
603’s traceability and test records work in your favor here. If a harness fails, the unit’s serial or lot record shows how it was built and what tests it passed, which makes a warranty claim faster to settle.
How do returns and rejected parts work?
Returns at 603 are handled case by case under your order terms, not under a public return window. Custom assemblies are built for one program, so a “changed my mind” return is rarely an option.
What usually matters is a nonconforming part: one that doesn’t meet your drawing, wire list, or test spec. Before your first order, agree on three things. First, how many days you have to inspect a delivery. Second, how you get a return authorization (often called an RMA number) before sending anything back. Third, what data you’ll send with the part, such as photos, test results, and the lot number.
Cancelling an order works the same way. Once 603 has bought material or started the build, those costs are normally charged back. Ask what the cancellation terms are at each stage.
What shipping terms apply?
Shipping terms are set on each order. 603 doesn’t post carriers, rates, or a default delivery term.
The key line on your PO is the delivery term, often written as an Incoterms rule. These are short trade codes that say where the seller’s job ends and who carries the risk and the freight cost. Two common ones:
- EXW (Ex Works): you pick up at the factory and carry the risk from there.
- DAP (Delivered at Place): the seller delivers to your named address and carries the risk until it arrives.
The official definitions are on the ICC Incoterms rules page. Write the exact term on the PO, along with your carrier account number if you pay freight, any packaging needs (ESD bags, moisture barrier, labeling), and whether early or partial shipments are allowed.
Tip: If your parts are ITAR-controlled, confirm export rules and shipping paperwork with 603 before the first shipment. The company is ITAR registered, but each shipment still needs to follow the rules for your program.
What to agree on before you place a PO
The safest move is to get every warranty, return, and shipping term written into your quote and PO before work starts. Use this list when you request a quote:
- Ask 603 to attach or name the terms and conditions of sale that apply to your quote.
- Confirm the warranty length, what it covers, and the remedy.
- Set the inspection window and the RMA steps for rejected parts.
- Agree on cancellation and rescheduling charges at each stage of the build.
- Write the Incoterms rule, freight payer, and carrier account on the PO.
- List packaging, labeling, and paperwork needs, such as certificates of conformance and test data.
- Check that the order acknowledgement matches your PO before the build starts.
If your company sends its own purchase terms with every PO, flag any clash between those and 603’s terms early. Settling it at the quote stage takes an email. Settling it after a failed part ships takes much longer.
To start, use the quote form on the website, email sales@603mfg.com, or call (603) 881-8336. The company replies to quote requests within two business days.
Frequently asked questions
Does 603 Manufacturing offer a warranty?
It doesn’t publish a standard one. Any warranty is set in your quote, PO, and order acknowledgement, so ask your sales contact for the warranty length, coverage, and remedy before you place the order.
What is 603 Manufacturing’s return policy?
There’s no public return policy. Returns are handled under your order terms, usually for parts that don’t meet your drawing or test spec. Agree on an inspection window and RMA steps before the first delivery.
Is 603manufacturing.com the same as 603mfg.com?
Yes. 603manufacturing.com now redirects to 603mfg.com, the current website for 603 Manufacturing in Hudson, New Hampshire. Contact details, the quote form, and the FAQ are all on 603mfg.com.
Do 603 Manufacturing’s QF106 terms apply to my order?
No, not if you’re a customer. QF106 is the company’s Terms and Conditions of Purchase for its own suppliers. Your rights as a buyer come from your quote, PO, and order acknowledgement.
How do I contact 603 Manufacturing about warranty or shipping?
Email sales@603mfg.com or call (603) 881-8336. The office is at 46 River Road, Hudson, NH 03051, and quote requests get a reply within two business days.
Conclusion
603manufacturing.com, now 603mfg.com, has no public warranty, return, or shipping policy. 603 Manufacturing builds custom cable assemblies, harnesses, RF cables, and box builds, so those terms are set in each quote, PO, and order acknowledgement. Before you order, get the warranty length and coverage, the inspection and RMA steps, cancellation charges, and the Incoterms rule in writing. A good result is a signed order where every one of those points is spelled out and matches on both sides.
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