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SRZ258L0036

Imperial Structural Locking Inserts

Locking Type / AD / Structural

Installed using the Crownserts Hand-Installation Tool:  CSTL428

SRZ258L0036 is a locking imperial insert. 4130 alloy steel; 1/4-28 UNF internal, 5/16-24 UNF installation threads. This is an old Anemo part. Please use CSL428AD

We can offer you the part SRZ258L0036 with Certificate of Quality, Certificate of Conformity and Certificate of Origin on request.

Thread & Dimensions

A internal thread (Class 3B) 1/4-28 UNF
B external thread (Class 3A) 5/16-24 UNF
Ø max minor special .2785
Ø C (+.008/-.002) .252
D (+.015/-.000) .095
E .210
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
SRZ258L0036 schematic

Material & Finish

Material Alloy Steel 4130 per AMS 6370
Finish Cadmium Plated per AMS-QQ-P-416 Type 2, Class 3 & SFL per SAE AS5272
Temperature range Up to 450+°F
Heat treat RC 25-34
Magnetic YES

Tooling & Preparation

Hand-Installation tool part number CSTL428
Step drill part number CSD0281
Tap through tool part number TTI0312
Blind tap tool part number TBI0312