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MATERIAL:A 286 Non magnetic heat and corrosion resistant steel.

FINISH:800°F - A 286 Silver Plate, AMS 2410.

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.
Unit of Measure

A - MAX

 N/A 0.645 Inch

B - MIN

 N/A 0.600 Inch

C - MIN

 N/A 0.562 Inch

D - MAX

 N/A 0.467 Inch

F ±.016

 N/A 0.109 Inch

G - MAX

 N/A 0.155 Inch

G - MIN

 N/A 0.125 Inch

H ±.015

 N/A 0.219 Inch

R - MAX

 N/A 0.053 Inch

V - REF

 N/A 0.025 Inch

W - MAX

 N/A 0.504 Inch

W - MIN

 N/A 0.494 Inch

Minimum Tensile Strength

 N/A 7720 lb

Approx. Weight

 N/A 0.570 lb/100

Thread Type

 N/A Unified

Configuration 1

 N/A Castellated Hex

Lock

 N/A Crimp Lock

Simplified Material

 N/A CRES

Temperature

 N/A 800°F - 425°C

Thread

 N/A 0.4375-20 UNJF-3B

Part Family

 N/A THCR 5xx