No head means no “under the head” — so a stud is measured end to end. The catch is that two people can read “end to end” two different ways.
A stud has no head — it’s threaded rod, threaded on both ends or all the way along. So length is simply the overall length, end to end. The wrinkle: some people measure the true tips, while others measure from the first full thread on each end (skipping the chamfered or partial threads at the very ends). On a long stud that’s a small difference; on a short one it matters. Knowing which you mean keeps the order right.
Measure the overall length — tip to tip (end to end). That’s the standard. For double-end and tap-end studs, also tell us the thread length on each end.
Threaded the full length. Just give us the overall length and the size.
Threads on both ends, plain in the middle. Give overall length plus the thread length on each end.
A short thread on one end (to screw into metal) and a longer nut end. Give overall length and both thread lengths.
For double-end and tap-end studs, the thread lengths are part of the spec — two studs of the same overall length aren’t the same if their ends are threaded differently. When in doubt, give us all three numbers: overall length and the thread length at each end.
Because the very ends of a stud are often chamfered or carry a partial thread, one person measures the physical tips (end to end) while another measures from the first full thread inward (first to first). We treat overall, end to end as the standard — but if a print or a customer calls out a thread-to-thread number, say so and we’ll match it exactly. Diameter and thread pitch are measured the same as any fastener — see the measuring basics.
Studs are easy to gauge on the counter — we’ll confirm overall length, thread lengths, and size so there’s no end-to-end confusion.
