Where Flow-Downs Hide
A prime's PO usually has a short front page and a general terms and conditions document, plus a separate quality clause list, plus the drawing notes. Flow-downs appear in all three. FAR and DFARS clauses are often incorporated by reference with a clause number and date, so the text is not in the PO.
Prime quality documents such as Boeing D6-51991 or a prime's own supplier quality requirements add obligations: notification of changes, access for source inspection, record retention periods, and approved source lists. Drawing notes add more, for example a requirement to use only Nadcap-accredited processors for specified processes. A reviewer has to read all three layers, and a revision of the T&Cs can quietly change the set between orders.
Clauses That Actually Change Your Cost
Most flow-downs are routine. A few change what you do on the floor or what you pay.
- DFARS 252.225-7009 specialty metals: restricts melt and source origin for certain alloys and affects material buying
- DFARS 252.246-7007 and 7008 on counterfeit electronic parts, relevant if you buy or install electronic components
- DFARS 252.204-7012 and CMMC: safeguarding covered defense information and incident reporting, which can force IT investment
- Customer source inspection, government source inspection and right of access clauses
- Record retention periods that exceed your standard, sometimes ten years or more
- Notification of nonconforming product and change of process, location or sub-tier source
Building a Clause Library
The practical tool is a table, kept in the ERP or a controlled spreadsheet, with one row per clause: number, title, date, your position (accepted, accepted with exception, rejected), the owner, and the cost or process impact. When a PO arrives, anything already in the library with an unchanged date is a quick confirm. Anything new goes to the quality manager, and to contracts or counsel for terms such as intellectual property assertions, indemnity or liquidated damages.
Keep exceptions on the quote itself so the PO does not override them. Over a year this library becomes the shop's real contract review memory and is far more useful to an auditor than initials on a page.
Try it here, free
US Manufacturing RFQ Flow-Down Clause Reference
A lookup table of common FAR, DFARS, export control and quality clauses that appear in RFQs and purchase orders, with quoting implications.
How AI Reads a 100-Page Package
A private language model can extract every clause number from the PO, T&Cs and quality documents, group them by type, compare them to the library, and flag differences in clause date or wording, with the page reference for each. It can also summarise what a clause obliges you to do in plain language for the estimator. It should not decide acceptance or interpret legal exposure; that stays with your quality and contracts people.
Because the packages often contain export-controlled drawings, the model should run on your own servers within the boundary that already holds technical data, with access limited by program and an audit log of each extraction.
When This Is Not Worth Automating
If most of your work comes from one or two customers whose terms rarely change, a one-page clause table and a disciplined review will serve you well. Automation earns its keep when you quote many RFQs from different primes, when packages are long, or when you have missed a clause change before. Do not use AI to skip reading clauses that carry legal weight: let it point you at the pages, then have a person read them.
Frequently asked questions
What is a flow-down clause in an aerospace purchase order?
It is a requirement from the government contract or the prime's terms that the prime passes down to its suppliers, usually by reference to a FAR or DFARS clause number or a quality document. As a supplier you are bound by it on acceptance, and you may have to pass it down again to your own sub-tier sources such as heat treaters and platers.
Do I have to flow clauses down to my own suppliers?
Where the clause says so, yes. AS9100D clause 8.4.3 also requires you to communicate applicable requirements to external providers. In practice that means your outside processing POs should carry the relevant quality notes, Nadcap requirements and specialty metals or certification requirements.
Which DFARS clauses matter most to a small machine shop?
Commonly 252.225-7009 for specialty metals, 252.204-7012 for safeguarding covered defense information, and the counterfeit part clauses if you handle electronic parts. CMMC requirements are phasing in through contracts, so check the current status of your prime's expectations rather than assuming.
Bring a recent PO package to Netray and see every flow-down listed, compared to your accepted clauses and cited to the page, running on your own hardware.