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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 0.676 Inch

C - MIN

 N/A 0.491 Inch

D ±.005

 N/A 0.412 Inch

E ±.005

 N/A 0.175 Inch

H ±.005

 N/A 0.450 Inch

L ±.005

 N/A 0.785 Inch

M ±.005

 N/A 0.158 Inch

N - REF

 N/A 0.388 Inch

P ±.003

 N/A 0.534 Inch

R ±.005

 N/A 0.440 Inch

T - REF

 N/A 0.195 Inch

W - MAX

 N/A 0.439 Inch

W - MIN

 N/A 0.430 Inch

X - REF

 N/A 0.486 Inch

Y - REF

 N/A 0.348 Inch

Z - REF

 N/A 0.076 Inch

Ultimate Tensile Strength

 N/A 14000 lb/min

Max. Locking Torque

 N/A 80.000 lb·in

Min. Breakaway Torque

 N/A 9.500 lb·in

Thread Length of The Screw Min.

 N/A 0.406 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 0.3750-24 UNJF-3B

Part Family

 N/A DHO 55-xxE