MS bolts
MS bolts
(OP)
I need a small quantity of MS20074-05-24 bolts and to date have found only one source and they want $20 each. Is there a source for these bolts at a reasonable price?
Thanks
Thanks
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RE: MS bolts
The MS20074 is a 125ksi cad plated, alloy steel, drilled head, hex bolt. Due to environmental issues, nobody really does cad plating any more. You can check the MS spec here:
http:
If it's allowed, you may consider using a more readily available equivalent.
RE: MS bolts
In the meantime I have drilled the heads of some grade 8 bolts and have done the first flight test. Since there are 4 bolts holding the rotor head on primarily in tension and the ship at full gross weighs 1500# even with a safety factor of 4, I have reserve strength.
BTW I recently purchased special 3/8-24 Lh and Rh studs with certs to grade 5 with rolled threads and paid much less than $20 each. These were special order also. With this kind of history, I was shocked to get a $20 ea. price.
RE: MS bolts
RE: MS bolts
I take it that your alternative bolt is an approved alternative and is also approved for use with the original nut. Also that the drilling of the head was in accordance with an approved spec.
And also that your modification/concession has sufficient justification, and is signed off.
Just replacing a bolt for a (maybe superior?) bolt does not automatically ensure you wont have a problem. You have just increased the joint stiffness, and as such it is possible that your fundamental frequencies have shifted, your load transfer dispersal may have altered, and many other reasons.
Things are normally as they are in the aero world for a reason.
RE: MS bolts
thanks
RE: MS bolts
RE: MS bolts
RE: MS bolts