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  • Nut – Reduced Hex Light Weight Castellated , Self Locking 450° / 800°F
MATERIAL:A 286 Non magnetic heat and corrosion resistant steel.

FINISH:
  • 800° F THCR 54 - A 286 Silver Plate, AMS 2410.
  • 450° F THCR 54 M - A 286 Passivated, Dry Film Lubricant.
  • 450° F THCR 54 CD - Cadmium plate per AMS-QQ-P-416 Type II, Class 2 + solid film lubricant.
MARKING: Parts marked with manufacturer’s symbol (SD), plus letter ‘’C’’.

PERFORMANCE:NASM-25027 Except locking torque values applicable for 5 cycles and tensile strength per table.

THREADS:In accordance with AS 8879 before lubrication.

APPLICATION: These nuts have been designed to replace AN320 castellated nuts on critical aircraft control linkage. This design provides an increase in tensile strength while reducing weight substantially over similar parts.

Contact Howmet for the diameter/type in manufacturing.
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A - MAX

B - MIN

C - MIN

D - MAX

F ±.016

G - MAX

G - MIN

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N/A 0.645 Inch N/A 0.600 Inch N/A 0.562 Inch N/A 0.467 Inch N/A 0.109 Inch N/A 0.155 Inch N/A 0.125 Inch N/A 0.4375-20 UNJF-3B N/A THCR 5xx
N/A 0.645 Inch N/A 0.600 Inch N/A 0.562 Inch N/A 0.467 Inch N/A 0.109 Inch N/A 0.155 Inch N/A 0.125 Inch N/A 0.4375-20 UNJF-3B N/A THCR 5xx
N/A 0.579 Inch N/A 0.539 Inch N/A 0.491 Inch N/A 0.405 Inch N/A 0.109 Inch N/A 0.155 Inch N/A 0.125 Inch N/A 0.3750-24 UNJF-3B N/A THCR 5xx
N/A 0.579 Inch N/A 0.539 Inch N/A 0.491 Inch N/A 0.405 Inch N/A 0.109 Inch N/A 0.155 Inch N/A 0.125 Inch N/A 0.3750-24 UNJF-3B N/A THCR 5xx
N/A 0.579 Inch N/A 0.539 Inch N/A 0.491 Inch N/A 0.405 Inch N/A 0.109 Inch N/A 0.155 Inch N/A 0.125 Inch N/A 0.3750-24 UNJF-3B N/A THCR 5xx
N/A 0.520 Inch N/A 0.482 Inch N/A 0.419 Inch N/A 0.342 Inch N/A 0.094 Inch N/A 0.100 Inch N/A 0.070 Inch N/A 0.3125-24 UNJF-3B N/A THCR 5xx
N/A 0.520 Inch N/A 0.482 Inch N/A 0.419 Inch N/A 0.342 Inch N/A 0.094 Inch N/A 0.100 Inch N/A 0.070 Inch N/A 0.3125-24 UNJF-3B N/A THCR 5xx
N/A 0.520 Inch N/A 0.482 Inch N/A 0.419 Inch N/A 0.342 Inch N/A 0.094 Inch N/A 0.100 Inch N/A 0.070 Inch N/A 0.3125-24 UNJF-3B N/A THCR 5xx
N/A 0.420 Inch N/A 0.386 Inch N/A 0.348 Inch N/A 0.280 Inch N/A 0.094 Inch N/A 0.100 Inch N/A 0.070 Inch N/A 0.2500-28 UNJF-3B N/A THCR 5xx
N/A 0.420 Inch N/A 0.386 Inch N/A 0.348 Inch N/A 0.280 Inch N/A 0.094 Inch N/A 0.100 Inch N/A 0.070 Inch N/A 0.2500-28 UNJF-3B N/A THCR 5xx
N/A 0.420 Inch N/A 0.386 Inch N/A 0.348 Inch N/A 0.280 Inch N/A 0.094 Inch N/A 0.100 Inch N/A 0.070 Inch N/A 0.2500-28 UNJF-3B N/A THCR 5xx
N/A 0.325 Inch N/A 0.291 Inch N/A 0.277 Inch N/A 0.220 Inch N/A 0.094 Inch N/A 0.065 Inch N/A 0.050 Inch N/A 0.1900-32 UNJF-3B N/A THCR 5xx
N/A 0.325 Inch N/A 0.291 Inch N/A 0.277 Inch N/A 0.220 Inch N/A 0.094 Inch N/A 0.065 Inch N/A 0.050 Inch N/A 0.1900-32 UNJF-3B N/A THCR 5xx
N/A 0.325 Inch N/A 0.291 Inch N/A 0.277 Inch N/A 0.220 Inch N/A 0.094 Inch N/A 0.065 Inch N/A 0.050 Inch N/A 0.1900-32 UNJF-3B N/A THCR 5xx
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