Anchor nuts are designed for blind mounted applications where it is impractical to use hex nuts or where it is desirable to have an attached nut for ease of maintenance.
MS21078-3 TWO LUG ANCHOR NUT (PACK OF 10)
Sturdy. Secured with SHEET MET SCREW 4RX1/4FHA through 1/8 aluminium.
MS21078-3 TWO LUG ANCHOR NUT
what I wanted
The nut-plates arrived quickly, and very well packaged. The quality is second to none!
High quality, a great design, and expensive. In my opinion, worth it for select applications. I used nine of these on a wheel pant installation. Two items: (1) get the right size pop rivets (2) careful with those threads when using. Make sure you get 2 or 3 turns just with your fingers as a start. These are very easy to cross-thread with a machine screw fastener.
Before ordering these, I noted that one reviewer complained about the threads not being very well done. I found that his review was accurate. I do not have a suitable tap to clean out the threads, as that reviewer did, so I just had to lubricate the threads and force a bolt through the nuts several times to make them useable. These are rather expensive items and there should be no excuse for such expensive items being of such poor quality.
Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.
You will need a 3/32" diameter rivet.
No, the AN366F-428A do not have dimpled, or countersunk, rivet holes.
The distance between the mounting holes is 0.688".
These are cad plated steel, they are magnetic.
0.998 INCHES MINIMUM AND 1.002 INCHES MAXIMUM
You will need a 3/32" diameter rivet, the length will depend on the material thickness.
They are not dimpled or countersunk.