A DIN 71752 stainless steel clevis takes a pin with the same nominal diameter as its inside width, so a 10x20 takes a 10 mm pin. The pin is held by a snap-in spring pin or by a grooved pin with a circlip. Choose the retainer by how often the joint is opened, then match the pin grade to the clevis.
Match the Pin Diameter to the Clevis
The first number in a DIN 71752 size is the inside width and the nominal pin diameter. Snap-in pins are listed by both numbers of the size, and the second sets the pin length, so a 10x20 and a 10x40 use different pins. A pin needs enough length to pass through both ears and the mating eye and still carry its retainer.
Snap-In Pin or Grooved Pin With a Clip
| Retainer | How it holds | Notes |
|---|---|---|
| Snap-in pin | A spring-steel clip is part of the pin | Easy to mount and remove, so it suits joints that are opened often |
| Grooved pin with E-clip | A DIN 6799 E-clip seats in a groove cut in the pin | The clip is a separate part, fitted after the pin |
| Grooved pin with KL or SL clip | A KL or SL clip can be used in place of the E-clip | Specify the clip type with the pin |
A snap-in pin datasheet describes a steel pin with a tempered spring-steel clip.
A grooved pin range shows the E-clip, KL clip and SL clip options, in zinc-plated steel and in stainless steel 1.4305.
Keep the Pin Grade Matched to the Clevis
Catalogue snap-in pins are typically zinc-plated steel. On a stainless clevis that pin tends to be the first part to corrode in a washdown or salt-spray joint. The zinc coating wears at the pin surface, and the zinc corrodes in its place. Stainless pins are listed as grooved pins with a clip, and the grade should be stated when you order.
What to Specify When You Order
- The clevis size, for example 10x20, which sets the pin diameter and length
- The retainer: snap-in pin, or grooved pin with E-clip, KL or SL clip
- Pin and clip grade, matched to the clevis
- Whether the pin ships with the clevis or separately
Conclusion
Take the pin diameter from the clevis size, choose a snap-in pin where the joint is opened often or a grooved pin with a clip, and match pin and clip grade to the clevis. If you are looking for a new supplier of stainless steel clevises with matching pins, send the clevis size and retainer to Profab Machine and we will quote the set.