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MATERIAL: A 286 (Z6NCT25) per AMS5731 or EN 2399.

FINISH:

  • 800° F PHCR54 - A 286 Silver Plate, AMS 2410.
  • 450° F PHCR54M - A 286 Passivated, Dry Film Lubricant.
  • 450° F PHCR54CD - Cadmium plated per AMS-QQ-P-416 + Dry Film Lubricant.

MARKING: Parts marked with manufacturer’s symbol (SD), plus letter "C’’.

PERFORMANCE: NASM25027, except ultimate tensile strength and locking torque values applicable for 5 cycles. Code FP = Unit control for fluorescent penetrant inspection (ex.: PHCR510M-FP).

THREADS: In accordance with AS8879 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 0.420 Inch

B - MIN

 N/A 0.386 Inch

C - MIN

 N/A 0.348 Inch

D - MAX

 N/A 0.280 Inch

F ±.016

 N/A 0.125 Inch

G - MAX

 N/A 0.100 Inch

G - MIN

 N/A 0.070 Inch

H ±.015

 N/A 0.281 Inch

R - MAX

 N/A 0.035 Inch

V - REF

 N/A 0.025 Inch

W - MAX

 N/A 0.315 Inch

W - MIN

 N/A 0.306 Inch

Minimum Tensile Strength

 N/A 4580 lb

Approx. Weight

 N/A 0.330 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

Specific Material

 N/A A286 Non Magnetic Heat and Corrosion Resistant Steel

Thread

 N/A 0.2500-28 UNJF-3B

Part Family

 N/A PHCR 5xx