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THREAD: AS8879
MATERIAL:
  • Nut and Basket - Alloy or carbon steel, heat treated.
  • Clip - Cres. or ARMCO 18-2MN (NITRONIC).
FINISH:
  • Nut - F50731-(*)-(*) Cadmium plated per fed. spec. AMS-QQ-P-416, Type II, Class 2 and Kaylube molybdenum disulfide dry lubricant coated per AS5272.
    F50731X(*)-(*) Cadmium plated per fed. spec. AMS-QQ-P-416. Type II, Class 2.
  • Basket - Cadmium plated per fed. spec. AMS-QQ-P-416. Type II, Class 2.
  • Clip - Passivate per AMS2700.
FLOATABILITY: .030 min. radially from center.
PERFORMANCE: NAS 3350, Class I, except as follows:
  • Reusability of 50 cycles using plated steel bolts. Seated to max. torque values as tabulated. (Apply to "No Code" parts only).
  • Push out and twist out values as tabulated when applied. Both separately and combined.
VARIATIONS: Add "BC" for bottom countersunk rivet holes. Example: F50731-3-4BC.
Unit of Measure

Specifications

A - MAX

N/A 1.292

B - MAX

N/A 0.720

C

N/A 0.505-0.495

D - MIN

N/A 0.317

H - MAX

N/A 0.344

J

N/A 1.002-0.998

K

N/A 0.135-0.130

M - MIN

N/A 0.070

V - MAX

N/A 0.045

W - REF

N/A 0.650

Push Out (LBS. MIN)

N/A 250

Twist Out (LBS. MIN)

N/A 280

Seating Torque (LBS.MAX)

N/A 120

Approx. Weight (LBS/100)

N/A 0.570

Nut Finish

N/A Cadmium Plate per AMS-QQ-P-416. Type II, Class 2

Bottom countersunk rivet holes

N/A Yes

Thread Type

N/A Unified

Configuration 1

N/A Two Lug

Configuration 2

N/A Floating

Configuration 3

N/A Replaceable Nut

Lock

N/A Crimp Lock

Simplified Material

N/A Alloy Steel

Strength

N/A 125KSI - 900Mpa

Temperature

N/A 450°F - 235°C

Thread

N/A 0.3125-24 UNJF-3B