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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 1.077 Inch

C - MIN

 N/A 0.846 Inch

D ±.005

 N/A 0.707 Inch

E ±.005

 N/A 0.312 Inch

H ±.005

 N/A 0.722 Inch

L ±.005

 N/A 1.250 Inch

M ±.005

 N/A 0.225 Inch

N - REF

 N/A 0.582 Inch

P ±.003

 N/A 0.852 Inch

R ±.005

 N/A 0.680 Inch

T - REF

 N/A 0.330 Inch

W - MAX

 N/A 0.752 Inch

W - MIN

 N/A 0.741 Inch

X - REF

 N/A 0.828 Inch

Y - REF

 N/A 0.536 Inch

Z - REF

 N/A 0.155 Inch

Ultimate Tensile Strength

 N/A 39230 lb/min

Max. Locking Torque

 N/A 300.000 lb·in

Min. Breakaway Torque

 N/A 32.000 lb·in

Thread Length of The Screw Min.

 N/A 0.630 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 0.6250-18 UNJF-3B

Part Family

 N/A DHO 55-xxE