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Oversize countersunk monel rivet?

Oversize countersunk monel rivet?

Oversize countersunk monel rivet?

(OP)
I have a repair drawing calling for a NAS1200M-6P rivet (A solid 3/16 dia 100 degree flush shear head passivated monel rivet).  The problem is the hole dia is currently 7/32 diameter and the repair doubler (0.063 Cres) is currently countersunk.  

I need an oversize 7/32 dia 100 degree flush shear head passivated monel rivet.  Let try a callout first, and then worry about availability if something exists.

I know I have a couple other options:
1.  Oversize to 0.250 inches and knife edge the doubler. (or even re-make the doubler, which is already installed)
2.  Oversize to 0.250 inches and install a countersink washer under a protruding head rivet.
3.  I can not install a hi-lok because I do not have sufficient clearance for a collar or nut.  
 

RE: Oversize countersunk monel rivet?

A380 -

BACR15DS7M is an oversize shear head monel rivet.  I suspect it may not be available, but it's worth a shot.

In the past, I've put put in protruding heads with a repair washer if there wasn't an interference or aerodynamic issue.  Sounds like you are in a hot area using stainless steel.

RE: Oversize countersunk monel rivet?

(OP)
BACR15DS7 only comes in 2017-T4 (D), or 7050-T73 (KE) not monel (M).  That is one of the first places I looked too.

 

RE: Oversize countersunk monel rivet?

Oversize flush shear heads are rare.

Any chance you could go with a blind protruding head rivet or bolt?  

RE: Oversize countersunk monel rivet?

If you are getting desperate...

drill hole to 0.250, countersink but do not knife edge (60%, 65%, 66%, 70% whatever you company goes with - don't want to start a dispute here - heck somebody is going to argue 2/3 not 66%)

install NAS1200M8 or even MS20247M8

shave head flush - thus the desperate part; not sure if it's practical or even possible with Monel.   

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