Model: HW51550-4

Extended Washer Self-locking Nut

Special Features:

Upper threaded portion formed out of round to provide self locking action

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque all metal design
Washer Outside Diameter
0.460 inches
Overall Height
0.280 inches
Nut Style
Hexagon
End Application
C-130j hercules aircraft
Width Across Flats
Between 0.305 inches and 0.313 inches
Thread Series
Unjf
Thready Qty Per Inch (tpi)
28
Thread Size
0.250 inches
Part Name Assigned By Controlling Agency
Nut - 6 point, captive washer, self-locking
Material
Iron alloy 660 nut
Material
Iron alloy 660 washer
Material Specification
Ams5525 assn standard single material response washer
Material Specification
Ams5732 assn standard 1st material response nut or ams5737 assn standard 2nd material response nut
Surface Treatment
Passivate nut
Surface Treatment
Passivate washer
NSN
5310-01-522-3353
Part Number
HW51550-4
Description
Nut,self-locking,extended Washer
CAGE
15653

A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery. An integral feature is incorporated for locking on the threads of a mating member.

Part HW51550-4 NSN 5310-01-522-3353

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
29730
FIIG:
A021A0
Concept No.:
1
App. Key:
BT
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:
A
ESD:
A
MMAC:
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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