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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 0.520 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 0.172 Inch

G - MAX

N/A 0.100 Inch

G - MIN

N/A 0.070 Inch

H ±.015

N/A 0.328 Inch

R - MAX

N/A 0.035 Inch

V - REF

N/A 0.055 Inch

W - MAX

N/A 0.378 Inch

W - MIN

N/A 0.367 Inch

Minimum Tensile Strength

N/A 7390 lb

Approx. Weight

N/A 0.550 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 PHCR 35x