Grade 5 Pin Hardware

[TomFin]

Greetings,

I have an application in which the shank or unthreaded portion of a Gr5 3/8" bolt is used as a pin for a member to rotate about. Well the design has changed so that the bolt has shortened (~3/4") and most bolts of this shorter length are fully threaded. Like I said it is a pin application and sees mostly shear so maybe the clamping force a bolt provides isn't needed at all. Although the application does require the strength that a Gr5 bolt offers.
I'm thinking of a 3/8" clevis type pin with the strength of Gr5 Hardware and some sort of external retaining ring.
But then again I might not be able to find the length I need off-the-shelf. So perhaps obtaining a high strength rod and turning it in-house might be the solution unless machinability and tooling issues occur.

Any suggustions appreciated

Failure is a prerequisite of successful design

 

[swall]

I would suggest LaSalle StressProof steel,which is a cold drawn 1144 free machining grade.

 

[unclesyd]

Can you use a shoulder or stripper bolt?

 

[unclesyd]

Another possibility is a step screw.

https://fa.misumiusa.com/gwos/catal...DUCT_ID=10462&CATALOG_ID=0001&CATEGORY_ID=006

 

[TomFin]

Swall, Thanks for pointing me in the direction. About the Lasalle A 311 steel, is this a standard steel common to most metal vendors? In the mfg business so my next question... is it economical?

Unclesyd,
I search all of my hardware from Mcmaster.com well just because Im unseasoned. I found a metric equivalent of class 12.9. Aware of any other extensive hardware dealers?

I've also seen situations where the threaded portion of a screw is used as the pinned surface. For fear of galling that would be my last choice even though it's steel on steel. Any thoughts



Failure is a prerequisite of successful design

 

[swall]

I would have to say the ASTM A311 is not a standard steel, but it is readily available. You can get it from McMaster-Carr, onlinemetals.com and many steel service centers.

 

[unclesyd]

The Metric equivalent of Grade 5 is 8.8

Here is every thing I think you can find in the way of pivot pins.

I think all these pins, except SS, would be equal to or better than the Grade 5 material you require.

http://www.misumiusa.com/Catalog.aspx?CategoryID=-1,59914,59995

 

[TomFin]

Thankyou all for the suggestions.


Failure is a prerequisite of successful design

 

[ActiveSolar05]

How about a bushing?? No rubber just a short tube outside the bolt.......

 

[mmart]

Is this a one of a kind part? or are you setting up for a production run?