CSXL428SP

Imperial Long Crownserts

CSX Series / Locking Type / Inconel 718 SP / Long

Installed using the Crownserts Hand-Installation Tool:  CSTL428

CSXL428SP reinforces or repairs 1/4-28 UNJF-3B imperial threads in aluminium, magnesium or other non-ferrous materials. Inconel 718 with silver-plated internal surfaces, with .280-.285 tap-hole guidance and CSTL428 hand installation tooling.

Crownserts can offer you the part CSXL428SP with Certificate of Quality, Certificate of Conformity and Certificate of Origin on request.

CSXL428SP - Imperial Long Crownserts
CSXL428SP - Imperial Long Crownserts
CSXL428SP - Imperial Long Crownserts
CSXL428SP - Imperial Long Crownserts
 How to install a Crownsert?
CSXL428SP - Imperial Long Crownserts
CSXL428SP - Imperial Long Crownserts
CSXL428SP - Imperial Long Crownserts

Thread & Dimensions

Thread Ø A 1/4-28 UNJF-3B
Thread Ø B 5/16-24 UNJF-3A
Minor diameter max .2785
Ø C (±.003) .256
D (±.010) .595
E ref .35
F (±.005) .090
G (±.005) .075
H ref .210
J 24
Through-hole preparation Min. full THD depth 0,817; Min. full depth .630
Blind-hole preparation Min. full THD depth 0,734; Min. full depth .630
CSXL428SP schematic

Material & Finish

Material Inconel 718 per AMS 5662
Finish Internal surfaces: Silver plated per AMS 2411 (0.0002 in min. thickness); External surfaces: Passivated per AMS 2700
Material note Only available as locking SP version.
Rolls Royce Applicable YES

Tooling & Preparation

Hand-installation tool part number CSTL428
Step drill part number CSD0281
Tap through tool part number TTI0311 / TTI0312
Blind tap tool part number TBI0311 / TBI0312
Removal tool part number CSRT428
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Crownserts is offering part CSXL428SP as factory new.