SR-503-0021

Imperial Structural Standard Inserts

Standard Type / A286P / Structural

Installed using the Crownserts Hand-Installation Tool:  CST820

SR-503-0021 repairs/reinforces 1/2-20 UNF imperial threads in Al/Mg or other non-ferrous materials; A286 alloy. Tap hole .531 17/32; install with CST820. This is an old Anemo part. Please use CS820A286P.

We can offer you the part SR-503-0021 with Certificate of Quality, Certificate of Conformity and Certificate of Origin on request.

SR-503-0021 - Imperial Structural Standard Inserts
SR-503-0021 - Imperial Structural Standard Inserts
SR-503-0021 - Imperial Structural Standard Inserts
SR-503-0021 - Imperial Structural Standard Inserts
 How to install a Crownsert?
SR-503-0021 - Imperial Structural Standard Inserts
SR-503-0021 - Imperial Structural Standard Inserts
SR-503-0021 - Imperial Structural Standard Inserts

Thread & Dimensions

A internal thread (Class 3B) 1/2-20 UNF
B external thread (Class 3A) 9/16-24 UNEF
Ø max minor special .5290
Ø C (+.008/-.002) .505
D (+.015/-.000) .135
F .490
G (±.010) .750
J (±1) 44
Through-hole preparation Min. full THD depth .973; Min. full depth .785
Blind-hole preparation Min. full THD depth .889; Min. full depth .785
SR-503-0021 schematic

Material & Finish

Material A286 per AMS5731 or AMS 5734
Finish PASSIVATED per AMS 2700
Temperature range -400°/+1200°F
Heat treat RC 32-40
Magnetic NO
Material note Only non-locking version available.

Tooling & Preparation

Hand-Installation tool part number CST820
Step drill part number CSD0531
Tap through tool part number TTI0562
Blind tap tool part number TBI0562
Removal tool part number CSRT820
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