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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 0.325 Inch

B - MIN

N/A 0.291 Inch

C - MIN

N/A 0.277 Inch

D - MAX

N/A 0.220 Inch

F ±.016

N/A 0.094 Inch

G - MAX

N/A 0.065 Inch

G - MIN

N/A 0.050 Inch

H ±.015

N/A 0.188 Inch

R - MAX

N/A 0.035 Inch

V - REF

N/A 0.020 Inch

W - MAX

N/A 0.252 Inch

W - MIN

N/A 0.243 Inch

Minimum Tensile Strength

N/A 1230 lb

Approx. Weight

N/A 0.150 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 0.1900-32 UNJF-3B

Part Family

N/A THCR 5xx