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MATERIAL:Alloy Steel - Heat treated

FINISH:450° F Alloy steel, Cadmium Plated per AMS QQ-P-416, Type II, Class 2. + Cetyl alcohol.

MARKING: Parts marked with manufacturer’s symbol (SD).

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 0.520 Inch

B - MIN

 N/A 0.482 Inch

C - MIN

 N/A 0.419 Inch

D - MAX

 N/A 0.342 Inch

F ±.016

 N/A 0.094 Inch

G - MAX

 N/A 0.100 Inch

G - MIN

 N/A 0.070 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 0.378 Inch

W - MIN

 N/A 0.367 Inch

Minimum Tensile Strength

 N/A 3700 lb

Approx. Weight

 N/A 0.340 lb/100

Thread Type

 N/A Unified

Configuration 1

 N/A Castellated Hex

Lock

 N/A Crimp Lock

Simplified Material

 N/A Alloy Steel

Temperature

 N/A 450°F - 235°C

Specific Material

 N/A Alloy Steel - Heat treated

Thread

 N/A 0.3125-24 UNJF-3B

Part Family

 N/A THCR 35xx