Bidding on 10-digit part numbers: the industrial PPC goldmine

Google Keyword Planner says a specific part number gets zero searches per month.

I've seen that exact part number, matched to an exact-match keyword in a client account, generate a $90,000 closed-won deal in a six-month window.

The tool is wrong. The opportunity is real.

Why the tools are blind to this

Third-party keyword tools (SEMrush, Ahrefs, Google's own Keyword Planner) estimate search volume based on clickstream data and historical patterns. The minimum they can detect reliably is around 10 searches per month.

A specific 10-digit MECCO part number might get searched by four procurement engineers per year. Globally. That's below any tool's detection threshold.

But those four engineers are searching at the exact moment of a replacement or new purchase decision. They know what they want. They have budget authority. They're not browsing — they're ordering.

The conversion rate on these terms approaches 30-40% from click to qualified opportunity. Average deal value: $15,000-50,000.

At a $0.80 CPC (these terms are often cheap because nobody else is bidding on them), the math is almost embarrassing.

How to find them

You need your product catalog. Every product you sell has:

• Model numbers
• Part numbers for the product itself
• Part numbers for consumables and replacement parts
• Accessories and compatible components

Each of these is a keyword candidate.

If you have 50 products and each product has 10-20 associated part numbers plus variants, you have 500-1,000 keyword candidates. Most of them will get zero impressions ever. A handful will get occasional searches from active buyers.

The ones that get searches will convert at very high rates.

The setup

These keywords don't need elaborate ad groups or sophisticated bidding. They need:

Exact match only. No broad, no phrase. The part number is specific enough that any expansion is probably wrong intent.

Simple, direct ad copy. "MECCO [Part Number] — Order Direct — Ships in 3 Business Days." Not clever. Specific. The engineer searching the part number already knows what they need.

Destination page. Ideally the exact product page for that part number. If you don't have individual part pages, at minimum a contact form pre-populated with the part number.

Uncapped budget. These terms spend almost nothing because they get almost no impressions. Capping the budget accomplishes nothing and might limit the rare high-volume day.

The Python build at scale

Manually building 1,000 part number ad groups is not viable. Automate it.

import csv

def build_part_number_campaigns(product_catalog_csv):
    keywords = []
    
    with open(product_catalog_csv) as f:
        reader = csv.DictReader(f)
        for row in reader:
            # Add exact match part number
            keywords.append({
                'campaign': 'PARTNUM|SRC|EXM|US|HIGH-INTENT|ALL',
                'ad_group': f"PN|{row['part_number']}",
                'keyword': f'[{row["part_number"]}]',
                'bid': 5.00,
                'headline1': f"{row['product_name']}",
                'headline2': f"Part #{row['part_number']}",
                'headline3': "Order Direct — Ships Fast",
                'description': f"Genuine {row['brand']} {row['product_type']}. Request a quote or order directly."
            })
    
    return keywords

Export from your product catalog. Run the script. Import the output into Google Ads via the bulk upload template.

The whole build takes a few hours, not weeks. And the campaigns require almost no ongoing maintenance because each keyword is so specific that search term variation is minimal.

The "Low Search Volume" status

Google will flag most of these as "Low Search Volume" and temporarily pause them. This is fine.

The keyword doesn't serve while it's paused. The moment there's a relevant search, Google re-enables it automatically. You don't miss anything.

Do not manually remove these keywords to "clean up" the account. The paused status costs you nothing. The search, when it happens, is worth everything.

The industrial PPC goldmine is sitting in your product catalog. Build the keywords. Let Google tell you which ones get traffic. The ones that do will be some of your highest-converting terms.