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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 0.592 Inch

C - MIN

 N/A 0.419 Inch

D ±.005

 N/A 0.347 Inch

E ±.005

 N/A 0.155 Inch

H ±.005

 N/A 0.433 Inch

L ±.005

 N/A 0.655 Inch

M ±.005

 N/A 0.150 Inch

N - REF

 N/A 0.336 Inch

P ±.003

 N/A 0.436 Inch

R ±.005

 N/A 0.380 Inch

T - REF

 N/A 0.180 Inch

W - MAX

 N/A 0.376 Inch

W - MIN

 N/A 0.367 Inch

X - REF

 N/A 0.469 Inch

Y - REF

 N/A 0.309 Inch

Z - REF

 N/A 0.063 Inch

Ultimate Tensile Strength

 N/A 9300 lb/min

Max. Locking Torque

 N/A 60.000 lb·in

Min. Breakaway Torque

 N/A 6.500 lb·in

Thread Length of The Screw Min.

 N/A 0.381 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 0.3125-24 UNJF-3B

Part Family

 N/A DHO 55-xxE