Castle nuts and cotter pins

[Greg Bockelman]

How shallow into a castle nut can the cotter pin be before one must add a second washer?

 

[Bell206]

How shallow into a castle nut can the cotter pin be before one must add a second washer?

The existing guidance states the head of the cotter pin should touch the bolt shank when properly engaged.

 

[Craig]

NASM33540, General Note 6 for Cotter pins...."When more than 50% of the Cotter pin diameter is above the castellation, A washer shall be used under the nut or a shorter fastener shall be used. A maximum of two washers may be permitted under a nut. Table 2 of the spec gives the minimum pin diameter based on thread size.

Note: Specific engineering callouts can over ride the 50% spec, bolt grip length change or the two washer limit.

 

[Greg Bockelman]

NASM33540, General Note 6 for Cotter pins...."When more than 50% of the Cotter pin diameter is above the castellation, A washer shall be used under the nut or a shorter fastener shall be used. A maximum of two washers may be permitted under a nut.

Thanks, Guys. This was the info I needed.

 

[Craig]

As an FYI, everyspec.com has most of the specifications for hardware and processes on their website and it's free...What they don't have, IHS.com has even more, but it's a fee site unless your company has an account.