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MATERIAL: Nut and Washer – Corrosion resistant steel, A286 per AMS 5737. Heat treatment 160KSI min.

FINISH :
  • Nut – Passivated per AMS 2700.
  • Washer – Passivated per AMS 2700.
LUBRICANT: Nut and Washer no lubricant.

PERFORMANCE : NASM 25027 except for tensile strength as tabulated.

THREADS: In accordance with AS 8879.

Note: SD part Number:
  • DHO 55-xx = Self Aligning Nut Assembly
  • DHO 55 Nxx = Nut
  • DHO 55 Wxx = 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

 1.077 Inch

C - MIN

 0.846 Inch

D ±.005

 0.707 Inch

E ±.005

 0.312 Inch

H ±.005

 0.722 Inch

L ±.005

 1.250 Inch

M ±.005

 0.225 Inch

N - REF

 0.582 Inch

P ±.003

 0.852 Inch

R ±.005

 0.680 Inch

T - REF

 0.330 Inch

W - MAX

 0.752 Inch

W - MIN

 0.741 Inch

X - REF

 0.828 Inch

Y - REF

 0.536 Inch

Z - REF

 0.155 Inch

Ultimate Tensile Strength

 39230 lb/min

Max. Locking Torque

 300.000 lb·in

Min. Breakaway Torque

 32.000 lb·in

Thread Length of The Screw Min.

 0.630 Inch

Thread Type

 Unified

Configuration 1

 Double Hex

Configuration 2

 Self-Aligning

Configuration 3

 Deep C'Bore

Lock

 Crimp Lock

Simplified Material

 CRES

Strength

 160KSI - 1100Mpa

Temperature

 800°F - 425°C

Specific Material

 A286 CRES per AMS 5737. Heat treatment 160KSI min.

Thread

 0.6250-18 UNJF-3B

Part Family

 DHO 55-xx