Model: M52021-4

Extended Washer Self-locking Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Washer Outside Diameter
Between 0.515 inches and 0.540 inches
Overall Height
Between 0.307 inches and 0.322 inches
Nut Style
Double hexagon
Washer Thickness
Between 0.015 inches and 0.057 inches
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
Material
Steel
Material Specification
Ams 5709 assn standard single material response
NSN
5310-01-137-5736
Part Number
M52021-4
Description
Nut,self-locking,extended Washer
CAGE
15653

A nut having 12 drive points, 24 sides, and an integral washer which extends beyond the points or periphery. An integral feature is incorporated for locking on the threads of a mating member.

Part M52021-4 NSN 5310-01-137-5736

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
29729
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:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
50.0
WCC:
713
TCC:
Z
SHC:
9
ACC:
Equipment for Aircraft

End Items End applications NSN 5310-01-137-5736 is a component of

  • Hh-60 Helicopter
  • Aircraft T-700 Engine
  • Ge T-700 (uh-60a) Aircraft Engine
  • Hh-53b) T64-ge-3/7 (h-53b/c/h Aircraft Engine
  • T700-ge-701c (uh-60/mh-60k/ah-64) Engine
  • T700-ge-701 (ah-64) Engine
  • Ah-1w Advance Attack Helicopter
  • 012844013
  • Aircraft Gas Turbine Engine Cold Section Module
  • 014114686
  • Gas Turbine Engine Compressor Rotor

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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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