SRW258-0001

Imperial Structural Heavy-Duty Standard Inserts

Standard Type / P / Structural Heavy-Duty

Installed using the Crownserts Hand-Installation Tool:  CST428

SRW258-0001 repairs/reinforces 1/4-28 UNF imperial threads in Al/Mg or other non-ferrous materials; passivated 17-4PH stainless. Tap hole .302 N; install with CST428. This is an old Anemo part. Please use CSH428P.

We can offer you the part SRW258-0001 with Certificate of Quality, Certificate of Conformity and Certificate of Origin on request.

SRW258-0001 - Imperial Structural Heavy-Duty Standard Inserts
SRW258-0001 - Imperial Structural Heavy-Duty Standard Inserts
SRW258-0001 - Imperial Structural Heavy-Duty Standard Inserts
SRW258-0001 - Imperial Structural Heavy-Duty Standard Inserts
 How to install a Crownsert?
SRW258-0001 - Imperial Structural Heavy-Duty Standard Inserts
SRW258-0001 - Imperial Structural Heavy-Duty Standard Inserts
SRW258-0001 - Imperial Structural Heavy-Duty Standard Inserts

Thread & Dimensions

A internal thread (Class 3B) 1/4-28 UNF
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
SRW258-0001 schematic

Material & Finish

Material 17-4PH, Cond H1025 per AMS 5643
Finish PASSIVATED per AMS 2700
Temperature range -110°/+900°F
Heat treat RC 35-42
Magnetic YES
Material note Only non-locking version available.

Tooling & Preparation

Hand-Installation tool part number CST428
Step drill part number CSD0302
Tap through tool part number TTI0343
Blind tap tool part number TBI0343
Removal tool part number CSHRT428
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