SRW250-0021

Imperial Structural Heavy-Duty Standard Inserts

Standard Type / A286P / Structural Heavy-Duty

Installed using the Crownserts Hand-Installation Tool:  CST420

SRW250-0021 repairs/reinforces 1/4-20 UNC imperial threads in Al/Mg or other non-ferrous materials; A286 alloy. Tap hole .302 N; install with CST420. This is an old Anemo part. Please use CSH420A286P.

We can offer you the part SRW250-0021 with Certificate of Quality, Certificate of Conformity and Certificate of Origin on request.

SRW250-0021 - Imperial Structural Heavy-Duty Standard Inserts
SRW250-0021 - Imperial Structural Heavy-Duty Standard Inserts
SRW250-0021 - Imperial Structural Heavy-Duty Standard Inserts
SRW250-0021 - Imperial Structural Heavy-Duty Standard Inserts
 How to install a Crownsert?
SRW250-0021 - Imperial Structural Heavy-Duty Standard Inserts
SRW250-0021 - Imperial Structural Heavy-Duty Standard Inserts
SRW250-0021 - Imperial Structural Heavy-Duty Standard Inserts

Thread & Dimensions

A internal thread (Class 3B) 1/4-20 UNC
B external thread (Class 3A) 11/32-24 NS
Ø max minor special .2976
Ø C (+.008/-.002) .264
D (+.015/-.000) .095
F ref .240
G (±.010) .380
Through-hole preparation Min. full THD depth .602; Min. full depth 0,415
Blind-hole preparation Min. full THD depth .519; Min. full depth 0,415
SRW250-0021 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 CST420
Step drill part number CSD0302
Tap through tool part number TTI0343
Blind tap tool part number TBI0343
Removal tool part number CSHRT420
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