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MATERIAL: Nut and Washer – Corrosion resistant steel, A286 per AMS5737. Heat treatment 160KSI min.

FINISH :
  • Nut – Passivated per AMS2700, method 1, type 2 or type 8, class 4.
  • Washer – Passivated per AMS2700, method 1, type 2 or type 8, class 4.
LUBRICANT: Nut and Washer - Cetyl Alcohol (Code E).

PERFORMANCE : NASM25027 except:
Locking Torque values applicable for 3 cycles: see values in table on page 1.
Axial Tensile Stength: see values in table on page 1.
Torque Out: see values in table on page 1.

THREADS: In accordance with AS8879.

Note: SD part Number:
  • DHO 55-xxE = Self Aligning Nut Assembly
  • DHO 55 NxxE = Nut
  • DHO 55 WxxE = Washer
APPLICATION: The DHO Feature Double Hex Details, High Tensile performance and Self Aligning characteristics. They are particularly designed simplify and provide cost savings in the assembly of components having non parallel surfaces by eliminating requirements for tapered shims or spot facing operations.

Contact Howmet for the diameter/type in manufacturing.
Unit of Measure

A ±.005

 N/A 0.763 Inch

C - MIN

 N/A 0.566 Inch

D ±.005

 N/A 0.487 Inch

E ±.005

 N/A 0.232 Inch

H ±.005

 N/A 0.499 Inch

L ±.005

 N/A 0.888 Inch

M ±.005

 N/A 0.172 Inch

N - REF

 N/A 0.440 Inch

P ±.003

 N/A 0.595 Inch

R ±.005

 N/A 0.501 Inch

T - REF

 N/A 0.267 Inch

W - MAX

 N/A 0.502 Inch

W - MIN

 N/A 0.492 Inch

X - REF

 N/A 0.597 Inch

Y - REF

 N/A 0.417 Inch

Z - REF

 N/A 0.125 Inch

Ultimate Tensile Strength

 N/A 18540 lb/min

Max. Locking Torque

 N/A 100.000 lb·in

Min. Breakaway Torque

 N/A 14.000 lb·in

Thread Length of The Screw Min.

 N/A 0.453 Inch

Thread Type

 N/A Unified

Configuration 1

 N/A Double Hex

Configuration 2

 N/A Self-Aligning

Configuration 3

 N/A Deep C'Bore

Lock

 N/A Crimp Lock

Simplified Material

 N/A CRES

Strength

 N/A 160KSI - 1100Mpa

Temperature

 N/A 450°F - 235°C

Specific Material

 N/A A286 CRES per AMS 5737. Heat treatment 160KSI min.

Thread

 N/A 0.4375-20 UNJF-3B

Part Family

 N/A DHO 55-xxE