Clevis sizes: adjustable clevis yokes (yoke ends) by tap thread, and structural drop-forged clevises by clevis number.
A clevis is a U-shaped fork with a pin through its two jaws: it joins a rod to a bracket, lever or plate and lets the joint pivot. An adjustable clevis yoke (yoke end, rod-end clevis) is tapped on its shank: screw it onto a threaded rod and turn it to set the length, then lock it with a jam nut. It takes a clevis pin held by a cotter pin or clip. A structural clevis is a heavier drop-forged clevis for tie rods, sag rods and hanger rods, sized by clevis number; its thread, grip and pin hole are made to order within the number’s limits.
Jump to: Adjustable clevis yokes · Structural clevises · Clevis pins
| Thread | Pin | Slot (grip) | End to pin center | Across jaws | Shank | Shank to pin | Shank length | Eye |
|---|---|---|---|---|---|---|---|---|
| 1/4-20 | 1/4″ | 9/32″ | 2″ | 5/8″ | 7/16″ | 1-1/4″ | 3/4″ | 1/2″ |
| 1/4-28 | 1/4″ | 9/32″ | 2″ | 5/8″ | 7/16″ | 1-1/4″ | 3/4″ | 1/2″ |
| 5/16-18 | 5/16″ | 11/32″ | 2-1/4″ | 3/4″ | 1/2″ | 1-7/16″ | 13/16″ | 19/32″ |
| 5/16-24 | 5/16″ | 11/32″ | 2-1/4″ | 3/4″ | 1/2″ | 1-7/16″ | 13/16″ | 19/32″ |
| 5/16-24 LH | 5/16″ | 11/32″ | 2-1/4″ | 3/4″ | 1/2″ | 1-7/16″ | 13/16″ | 19/32″ |
| 3/8-16 | 3/8″ | 7/16″ | 2-1/2″ | 7/8″ | 5/8″ | 1-5/8″ | 7/8″ | 11/16″ |
| 3/8-24 | 3/8″ | 7/16″ | 2-1/2″ | 7/8″ | 5/8″ | 1-5/8″ | 7/8″ | 11/16″ |
| 3/8-24 LH | 3/8″ | 7/16″ | 2-1/2″ | 7/8″ | 5/8″ | 1-5/8″ | 7/8″ | 11/16″ |
| 7/16-20 | 7/16″ | 1/2″ | 2-7/8″ | 1″ | 23/32″ | 1-7/8″ | 1″ | 13/16″ |
| 1/2-13 | 1/2″ | 9/16″ | 3″ | 1-1/8″ | 13/16″ | 1-7/8″ | 1-1/8″ | 15/16″ |
| 1/2-20 | 1/2″ | 9/16″ | 3″ | 1-1/8″ | 13/16″ | 1-7/8″ | 1-1/8″ | 15/16″ |
| 1/2-20 LH | 1/2″ | 9/16″ | 3″ | 1-1/8″ | 13/16″ | 1-7/8″ | 1-1/8″ | 15/16″ |
| 5/8-11 | 5/8″ | 11/16″ | 4-15/16″ | 1-3/8″ | 1-1/16″ | 3-11/16″ | 1-1/4″ | 1-3/16″ |
| 5/8-11 LH | 5/8″ | 11/16″ | 4-15/16″ | 1-3/8″ | 1-1/16″ | 3-11/16″ | 1-1/4″ | 1-3/16″ |
| 5/8-18 | 5/8″ | 11/16″ | 4-15/16″ | 1-3/8″ | 1-1/16″ | 3-11/16″ | 1-1/4″ | 1-3/16″ |
| 3/4-10 | 3/4″ | — | — | 1-5/8″ | 1-1/4″ | 4-9/16″ | 1-1/2″ | 1-7/16″ |
| 3/4-10 LH | 3/4″ | — | — | 1-5/8″ | 1-1/4″ | 4-9/16″ | 1-1/2″ | 1-7/16″ |
| 3/4-16 | 3/4″ | — | — | 1-5/8″ | 1-1/4″ | 4-9/16″ | 1-1/2″ | 1-7/16″ |
| 3/4-16 LH | 3/4″ | — | — | 1-5/8″ | 1-1/4″ | 4-9/16″ | 1-1/2″ | 1-7/16″ |
| Clevis | Max thread | Max pin | Eye dia D | Length A | Thread end N | Neck W | Jaw T |
|---|---|---|---|---|---|---|---|
| #2 | 5/8″ | 3/4″ | 1-7/16″ | 3-9/16″ | 5/8″ | 1-1/16″ | 5/16″ (+1/32, −0″) |
| #2 1/2 | — | 1-1/2″ | 2-1/2″ | 4″ | — | 1-1/4″ | 5/16″ (+1/32, −0″) |
| #3 | 1-3/8″ | 1-3/4″ | 3″ | 5-1/16″ | 1-1/4″ | 1-1/2″ | 1/2″ (+1/16, −1/32″) |
| #3 1/2 | 1-1/2″ | 2″ | 3-1/2″ | 6″ | 1-1/2″ | 1-3/4″ | 1/2″ (+1/16, −1/16″) |
| #4 | 1-3/4″ | 2-1/4″ | 4″ | 5-15/16″ | 1-3/4″ | 2″ | 1/2″ (+1/16, −1/16″) |
| #5 | — | 2-1/2″ | 5″ | 7″ | 2-1/4″ | 2-1/2″ | 5/8″ (+3/32, −0″) |
| #6 | 2-1/2″ | 3″ | 6″ | 8″ | 2-3/4″ | 3″ | 3/4″ (+3/32, −0″) |
| #7 | 3″ | 3-3/4″ | 7″ | 9″ | 3″ | 3-1/2″ | 7/8″ (+1/8, −1/16″) |
| #8 | 4″ | 4-1/4″ | 8″ | 10-1/8″ | 4″ | 4″ | 1-1/2″ (+1/8, −1/16″) |
Good to know
Order a yoke by its thread, then match the pin. Each yoke takes one pin size; the clevis pin and its cotter pin are on our Pin Dimensions page. Left-hand (LH) yokes pair with right-hand ones on a turnbuckle-style rod so the rod adjusts both ends at once.
Working loads aren’t on our chart. Makers rate their clevises with different safety factors and materials. For a load-bearing joint, use the maker’s rating for the exact part, and never use a pin smaller than the hole.
Quick answers
- What size pin goes in a 3/8-24 clevis yoke?
- A 3/8-24 adjustable clevis yoke takes a 3/8″ clevis pin; its slot (grip) is 7/16″ and it is 2-1/2″ from the threaded end to the pin center.
- What are the dimensions of a 1/2-20 clevis yoke?
- A 1/2-20 yoke end: 1/2″ pin, 9/16″ slot, 1-1/8″ across the jaws.
- What is the grip of a clevis?
- The grip is the width of the slot between the clevis jaws — the thickest plate or rod end that fits in it. On an adjustable yoke it is fixed by the size; on a structural clevis it is made to order (Portland Bolt: plate thickness plus 1/4″ is usual).
- What is the largest rod and pin a #2 clevis takes?
- A #2 structural clevis takes up to a 5/8″ tapped thread and a 3/4″ pin; its eye is 1-7/16″ across.
- What is the difference between an adjustable clevis yoke and a structural clevis?
- An adjustable clevis yoke (yoke end) is a small forged clevis tapped for a control rod, sized by its thread. A structural clevis is a larger forged clevis for tie rods and hangers, sized by clevis number, with the thread, grip and pin hole made to order.