Vintage Michigan Bolt & Nut Co Detroit Advertising Keychain

There is a particular kind of Detroit history that lives not in the big automaker archives but in the small, everyday promotional items handed across a counter by the thousands of industrial suppliers that kept the whole regional economy running behind the scenes. Nuts, bolts, screws, and washers rarely get their own nostalgia, but the businesses that sold them still understood the value of a good giveaway, and this little keychain is exactly that: a small, sturdy piece of mid-century Detroit industrial advertising that somebody's keys hung from for who knows how many years.

This is a promotional keychain for Michigan Bolt & Nut Co., Inc., a Detroit-based industrial fastener supplier, consisting of a round black molded-plastic disc fob attached through a jump ring and a flexible snake-link chain to a split key ring. One face of the disc reads "SCREWS / BOLTS / NUTS / WASHERS," the company's straightforward product line, while the reverse carries the full company name, an old-style phone number with the exchange name format "TR 1-8900," and "DETROIT, MICH. 48211." That combination, an exchange-name phone number paired with a full five-digit ZIP code, which wasn't introduced until 1963, dates this piece confidently to somewhere in the 1960s to 1970s, a nice, specific window for a simple giveaway item.

We looked closely at every surface for a keychain-manufacturer's mark, separate from the advertiser's own name, and found only a small "U.S.A." embossed near the attachment loop, confirming country of manufacture but not naming who actually produced the fob itself. That's entirely typical for advertising premiums like this one; the company paying for the giveaway wanted their own name front and center, not the fob-maker's, and we're telling you honestly rather than guessing at a manufacturer we can't confirm.

We want to walk through condition carefully. The black plastic disc shows light surface scratches and scuffs on both faces from genuine handling over the decades, but no cracks, chips, or missing material anywhere, and the cream-colored lettering on both sides remains crisp and fully legible with no fading or flaking. The metal hardware, the split ring, jump ring, and snake chain, shows two-tone wear, silver-tone plating with warmer brass-tone base metal showing through at the split ring's hinge and the chain's crimped ends, honest evidence of a keychain that actually lived in someone's pocket rather than sitting untouched in a drawer. There's no rust or corrosion anywhere, the chain segment appears fully intact with no broken coils, and the split ring opens and closes normally. Overall, this is a good, honestly used vintage piece, light cosmetic wear on the plastic and moderate plating wear on the metal, but fully intact and completely functional.

Advertising fobs and keychains from specific, named regional businesses like this one hold real appeal for a particular crossover audience: Detroit and Michigan history collectors, industrial and automobilia enthusiasts drawn to the broader ecosystem of businesses that supported the auto industry without being automakers themselves, and advertising-collectible hunters generally, who prize exactly this kind of small, specific, dated piece of a real company's promotional history over generic, unbranded giveaways.

We priced this keychain by comparing it against similar regional industrial and business advertising fobs from the same general era, a modest but genuinely active collecting category, and leaned toward a fair, honest number reflecting both its clear Detroit-industrial specificity and its complete, fully functional condition, without overstating demand we can't fully confirm for this particular company.

Please look closely at every photograph before deciding, since they show exactly the keychain you will receive. If you have any questions about the company, the dating, or anything else, we are glad to answer honestly rather than have you guess. It will be packaged carefully and shipped promptly. Thank you for taking a moment to consider this small, specific piece of Detroit's industrial advertising history, and we hope it finds its way into a collection where its story keeps right on hanging around.

 _gsrx_vers_1736 (GS 9.9.5 (1736))

Item specifics

From The Spiderpunk Web collection of authentic antiques and collectibles. Ships from the United States with tracking.