This is a pack of ten (10) black plastic rivets, which hold the interior plastic body panels in place on all early Datsun Z's. Original rivets can eventually break, but mainly the center pins become "lost" when removed for panel replacement. Exact number of rivets varies by year, but to replace all of them on a 70-73 240Z, 4 packs is suggested, and you will have a few extra. For 74-78 260Z-280Z, 5 packs is suggested if you want a few in reserve.
Note that these are NOT 70-73 Exterior Tail Light Panel Rivets, 70-78 Weatherstrip Rivets, or 70-78 Kick Panel Rivets, all of which are a different size/type