Model: MS21133-20

Extended Washer Self-locking Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque all metal design
Washer Outside Diameter
2.022 inches
Lubrication
Soluble lubricant
Overall Height
1.250 inches
Nut Style
Spline drive
Drive Point Quantity
12
Washer Thickness
0.138 inches
Thread Series
Unjf
Thready Qty Per Inch (tpi)
12
Hardness Rating
48.0 rockwell c
Thread Size
1.250 inches
Countersink Angle
85.0 degrees washer
Material
Steel comp h11
Material Specification
Ams 6487 assn standard single material response
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, ty2, cl2 federal specification single treatment response
NSN
5310-01-416-0493
Part Number
MS21133-20
Description
Nut,self-locking,extended Washer
CAGE
96906

A nut, circular in shape, having wrenching facilities such as flats, holes, protrusions, slots or splines in or on the periphery. It has an integral washer which extends beyond the wrenching element periphery and an integral feature is incorporated for locking on the threads of a mating member.

Part MS21133-20 NSN 5310-01-416-0493

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
36744
FIIG:
A021A0
Concept No.:
1
App. Key:
BS
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:
BA
CRITL:
X

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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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