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MATERIAL: Alloy Steel - Heat treated.

FINISH:
  • 450° F PHCR 354 Alloy steel, Cadmium Plate per AMS QQ-P-416, Type II, Class 2. + Cetyl alcohol.
  • 450° F PHCR 354 S7 Alloy steel, Cadmium Plate + Soluble Lubricant (SPS 7 or Kaylube K76).
  • 450° F PHCR 354 M Alloy steel, Cadmium Plate per AMS QQ-P-416, type and class optional if lubricated nuts meet salt spray requirement of AMS-QQ-P-416,type II. + dry Film Lubricant.
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 0.645 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 0.266 Inch

G - MAX

 N/A 0.155 Inch

G - MIN

 N/A 0.125 Inch

H ±.015

 N/A 0.453 Inch

R - MAX

 N/A 0.053 Inch

V - REF

 N/A 0.070 Inch

W - MAX

 N/A 0.504 Inch

W - MIN

 N/A 0.494 Inch

Minimum Tensile Strength

 N/A 15450 lb

Approx. Weight

 N/A 1.150 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 0.4375-20 UNJF-3B

Part Family

 N/A PHCR 35x