CS420A286AL

Imperial Structural Standard Crownserts

CS Series / Standard Type / A286AL / Structural

Installed using the Crownserts Hand-Installation Tool:  CST420

CS420A286AL is an imperial structural standard crownsert in A286 alloy with IVD aluminium coating, designed to strengthen 1/4-20 UNC threads in lightweight parent materials. It uses 5/16-24 UNF external threads and CST420 installation tooling.

Crownserts can offer you the part CS420A286AL with Certificate of Quality, Certificate of Conformity and Certificate of Origin on request.

CS420A286AL - Imperial Structural Standard Crownserts
CS420A286AL - Imperial Structural Standard Crownserts
CS420A286AL - Imperial Structural Standard Crownserts
CS420A286AL - Imperial Structural Standard Crownserts
 How to install a Crownsert?
CS420A286AL - Imperial Structural Standard Crownserts
CS420A286AL - Imperial Structural Standard Crownserts
CS420A286AL - Imperial Structural Standard Crownserts

Thread & Dimensions

A internal thread (Class 3B) 1/4-20 UNC
B external thread (Class 3A) 5/16-24 UNF
Ø max minor special .2785
Ø C (+.008/-.002) .252
D (+.015/-.000) .095
F .240
G (±.010) .380
J (±1) 24
Through-hole preparation Min. full THD depth .519; Min. full depth .415
Blind-hole preparation Min. full THD depth .519; Min. full depth .415
CS420A286AL schematic

Material & Finish

Material A286 per AMS5731 or AMS 5734
Finish IVD ALUMINIUM coating per MIL-DTL-83488 type 2, Class 3 & SFL per SAE AS5272, Type I
Temperature range Up to 600°F
Heat treat RC 32-40
Magnetic NO

Tooling & Preparation

Hand-installation tool part number CST420
Step drill part number CSD0281
Tap through tool part number TTI0312
Blind tap tool part number TBI0312
Removal tool part number CSRT420
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Crownserts is offering part CS420A286AL as factory new.