Model: HK52738-4

Extended Washer Self-locking Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque all metal design
Washer Outside Diameter
Between 0.505 inches and 0.515 inches
Overall Height
0.292 inches
Nut Style
Hexagon
Washer Thickness
Between 0.113 inches and 0.123 inches
Width Across Flats
Between 0.305 inches and 0.313 inches
Tempurature Rating
800.0 degrees fahrenheit
Thread Series
Unjf
Thready Qty Per Inch (tpi)
28
Thread Size
0.250 inches
Material
Iron alloy 660
Material Specification
Ams 5525 assn standard 1st material response washer or ams 5737 assn standard 2nd material response washer
Material Specification
Ams 5737 assn standard single material response nut
Material Specification
Ams 5737 assn standard single material response
Precious Material And Location
All surfaces silver
Precious Material
Silver
Surface Treatment
Silver
Surface Treatment
Silver nut
Surface Treatment
Passivate washer
Surface Treatment Specification
Qq-s-365 federal specification single treatment response or ams 2410 assn standard single treatment response
NSN
5310-01-333-4486
Part Number
HK52738-4
Description
Nut,self-locking,extended Washer
CAGE

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 HK52738-4 NSN 5310-01-333-4486

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:
S
ESD:
ESD:
MMAC:
BA
CRITL:
X

Packaging & Shipping

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

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
573
TCC:
Z
SHC:
9
ACC:
Construction Materials

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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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