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 Alcoa for the diameter/type in manufacturing.
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Item #

A ±.005

C - MIN

D ±.005

E ±.005

H ±.005

L ±.005

M ±.005

Thread

DHO 55-3 N/A 0.358 Inch N/A 0.277 Inch N/A 0.216 Inch N/A 0.083 Inch N/A 0.279 Inch N/A 0.380 Inch N/A 0.104 Inch N/A 0.1900-32 UNJF-3B
DHO 55-4 N/A 0.460 Inch N/A 0.347 Inch N/A 0.282 Inch N/A 0.118 Inch N/A 0.335 Inch N/A 0.510 Inch N/A 0.102 Inch N/A 0.2500-28 UNJF-3B
DHO 55-5 N/A 0.592 Inch N/A 0.419 Inch N/A 0.347 Inch N/A 0.155 Inch N/A 0.433 Inch N/A 0.655 Inch N/A 0.150 Inch N/A 0.3125-24 UNJF-3B
DHO 55-6 N/A 0.676 Inch N/A 0.491 Inch N/A 0.412 Inch N/A 0.175 Inch N/A 0.450 Inch N/A 0.785 Inch N/A 0.158 Inch N/A 0.3750-24 UNJF-3B
DHO 55-7 N/A 0.763 Inch N/A 0.566 Inch N/A 0.487 Inch N/A 0.232 Inch N/A 0.499 Inch N/A 0.888 Inch N/A 0.172 Inch N/A 0.4375-20 UNJF-3B
DHO 55-8 N/A 0.830 Inch N/A 0.637 Inch N/A 0.555 Inch N/A 0.260 Inch N/A 0.540 Inch N/A 1.000 Inch N/A 0.169 Inch N/A 0.5000-20 UNJF-3B
DHO 55-9 N/A 0.986 Inch N/A 0.703 Inch N/A 0.639 Inch N/A 0.300 Inch N/A 0.674 Inch N/A 1.162 Inch N/A 0.223 Inch N/A 0.5625-18 UNJF-3B
DHO 55-10 N/A 1.077 Inch N/A 0.846 Inch N/A 0.707 Inch N/A 0.312 Inch N/A 0.722 Inch N/A 1.250 Inch N/A 0.225 Inch N/A 0.6250-18 UNJF-3B
DHO 55-12 N/A 1.200 Inch N/A 0.987 Inch N/A 0.844 Inch N/A 0.325 Inch N/A 0.812 Inch N/A 1.445 Inch N/A 0.222 Inch N/A 0.7500-16 UNJF-3B
DHO 55-14 N/A 1.360 Inch N/A 1.130 Inch N/A 0.986 Inch N/A 0.350 Inch N/A 0.898 Inch N/A 1.611 Inch N/A 0.219 Inch N/A 0.8750-14 UNJF-3B
DHO 55-16 N/A 1.580 Inch N/A 1.270 Inch N/A 1.123 Inch N/A 0.375 Inch N/A 1.060 Inch N/A 1.736 Inch N/A 0.278 Inch N/A 1.0000-12 UNJF-3B
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