CS1216SP

Imperial Large Crownserts

CS Series / Standard Type / SP / Large

Installed using the Crownserts Hand-Installation Tool:  CST1216

CS1216SP is an imperial large crownsert in silver-plated 17-4PH stainless steel, designed to strengthen 3/4-16 UNF threads in lightweight parent materials. It uses 7/8-20 UNEF external threads and CST1216 installation tooling.

Crownserts can offer you the part CS1216SP with Certificate of Quality, Certificate of Conformity and Certificate of Origin on request.

CS1216SP - Imperial Large Crownserts
CS1216SP - Imperial Large Crownserts
CS1216SP - Imperial Large Crownserts
CS1216SP - Imperial Large Crownserts
 How to install a Crownsert?
CS1216SP - Imperial Large Crownserts
CS1216SP - Imperial Large Crownserts
CS1216SP - Imperial Large Crownserts

Thread & Dimensions

A internal thread (Class 3B) 3/4-16 UNF
B external thread (Class 3A) 7/8-20 UNEF
Ø max minor special .8240
Ø C (+.008/-.002) .756
D (+.015/-.000) .170
F .750
G (±.010) 1.120
J (±1) 44
Through-hole preparation Min. full THD depth 1.380; Min. full depth 1.155
Blind-hole preparation Min. full THD depth 1.280; Min. full depth 1.155
CS1216SP schematic

Material & Finish

Material 17-4PH, Cond H1025 per AMS 5643
Finish PASSIVATED per AMS 2700 & Silver Plated per AMS 2411 (.0002 min. thickness)
Temperature range -110°/+900°F
Heat treat RC 35-42
Magnetic YES

Tooling & Preparation

Hand-installation tool part number CST1216
Step drill part number CSD0836
Tap through tool part number TTI0875
Blind tap tool part number TBI0875
Removal tool part number CSRT1216
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Crownserts is offering part CS1216SP as factory new.