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THREAD: AS8879
MATERIAL:
  • Nut - 3AL - 2.5V Titanium alloy per AMS6940 (UNS R56320).
  • Washer - CP - 4 (Commercially pure) Titanium per AMS4940 (UNS R50550).
HEAT TREAT: Nut & Washer - per AMS - H - 81200
FINISH:
  • NUT - Coat Outside of Nut (Threads & C'Bore Optional) with dry film lubricant per AS5272, Type I, plus (Optional) cetyl alcohol luricant.
  • Washer - Dry film lubricant coat per AS5272, Type I, plus (Optional) cetyl alcohol lubricant.
PERFORMANCE: ENS1312, Expect as follows :
  • Free running torque for EN1282ND5 & NDU5 to be 4 ozf-in Maximum.
Unit of Measure

Specifications

A

N/A 0.424 in

A1

N/A 0.448-0.476 in

B

N/A 0.268-0.274 in

C

N/A 0.359 in

D

N/A 0.323 in

L - MAX

N/A 0.340 in

M - MAX

N/A 0.323 in

P

N/A 0.275 in

X

N/A 0.097 in

Drive Tool Dash No.

N/A -8

Axial Tensile Strength lbf Min

N/A 4300.000 lb

Thread per AS8879

N/A 0.2500-28 UNJF-3B

Nut Material

N/A Titanium

Washer Material

N/A Titanium

Nut Heat Treat

N/A AMS-H-81200

Washer Heat Treat

N/A AMS-H-81200

Nut Finish

N/A Coat outside of nut (Threads & C´bore optional) with dry film lubricant per AS5272, Type 1, plus (optional) cetyl alcohol lubricant.

Washer Finish

N/A Dry film lubricant coat per AS5272, Type 1, plus (optional) cetyl alcohol lubricant.

Performance

N/A ENSI312, Except as Follows: A) Free running torque for ENI282ND5 & NDU5 to be 4 ozf-in maximum

Nominal Stud Nut Size

N/A 1/4-28

Notes

Notes

N/A 1. Dimensions to be met after finish, but before lubrication.
2. Color Identification: ENI282ND(*): Nuts are identified with white paint within lobe area as shown. All three lobes shall be completely covered with paint on a minimum of 95% of the lobe area of each nut. Overspray permitted on exterior surfaces. ENI282NDU(*): "No paint".
3. All Eddie-Bolt® 2 nuts must be installed using an appropriate Eddie-Bolt® 2 fastener installation tool.