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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 0.850 Inch

B - MIN

 N/A 0.815 Inch

C - MIN

 N/A 0.775 Inch

D - MAX

 N/A 0.592 Inch

F ±.016

 N/A 0.391 Inch

G - MAX

 N/A 0.186 Inch

G - MIN

 N/A 0.156 Inch

H ±.015

 N/A 0.609 Inch

R - MAX

 N/A 0.062 Inch

V - REF

 N/A 0.080 Inch

W - MAX

 N/A 0.692 Inch

W - MIN

 N/A 0.680 Inch

Minimum Tensile Strength

 N/A 26810 lb

Approx. Weight

 N/A 3.200 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 0.5625-18 UNJF-3B

Part Family

 N/A PHCR 35x