Model: MS21224-8

Assembled Washe Self-locking Nut

Special Features:

Surface finish shall not exceed 125 microinches; nut is red in color; ultimate tensile strength is 5600 lbs.Min

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque with nonmetallic insert
Washer Outside Diameter
0.840 inches
Overall Height
Between 0.546 inches and 0.576 inches
Nut Style
Flat with turned back edge
Nut Height
0.150 inches
Width Across Flats
Between 0.741 inches and 0.752 inches
Thread Series
Unjf
Thready Qty Per Inch (tpi)
20
Thread Size
0.500 inches
Criticality Code Justification
Feat
Part Name Assigned By Controlling Agency
Nut, self-locking, castellated, hexagon counterbored, assembled washer, 250 degree f, non-metallic inser (for self-retaining bolts)
Material
Aluminum alloy 2024 and aluminum alloy 7075 washer
Material
Plastic nylon locking insert
Material
Steel comp 1137 nut
Material Specification
Qq-a-250 and qq-a-225 federal specification 1st material response and qq-a-250 federal specification 2nd material response washer
Material Specification
Ams 5024 uns g11370 (aisi 1137) national std/spec single material response nut
Surface Treatment
Cadmium nut
Surface Treatment
Chromate washer
Surface Treatment Specification
Alodine per mil-c-5541 military specification single treatment response washer
Surface Treatment Specification
Qq-p-416, ty ii, cl 2 federal specification single treatment response nut
Specification Data
80205-nas-21224 professional/industrial association standard
Reference Number Differentiating Characteristics
As differentiated by color; airworthy certificated item supplied with provenance & traceability documentation
NSN
5310-01-642-6447
Part Number
MS21224-8
Description
Nut,self-locking,assembled Washe
CAGE
80205

A nut on which has been assembled a nonremovable washer. An integral feature is incorporated for locking on the threads of a mating member.

Part MS21224-8 NSN 5310-01-642-6447

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
29736
FIIG:
A021A0
Concept No.:
1
App. Key:
BG
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
Y

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Schedule B and Export
  • Schedule B: 7318160000
  • SITC: 69421
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Nuts of iron or steel

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