Model: 55LH7644-144

Hexagon Self-locking Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque all metal design
Lubrication
Soluble lubricant
Nut Style
Hexagon
Nut Height
Between 0.470 inches and 0.485 inches
Width Across Flats
Between 1.239 inches and 1.252 inches
Tempurature Rating
Between -65.0 degrees fahrenheit and 450.0 degrees fahrenheit
Thread Series
Unjf
Thready Qty Per Inch (tpi)
14
Hardness Rating
Between 34.0 rockwell c and 41.0 rockwell c
Thread Size
0.875 inches
Bearing Surface Type
Chamfered or washer faced
Material
Steel comp 4130 nut or steel comp 4140 nut or steel comp 4340 nut or steel comp 8740 nut
Material Specification
66 federal standard all material responses nut
Surface Treatment
Cadmium
Surface Treatment Specification
Qq-p-416, type 2, cl 2 federal specification single treatment response
NSN
5310-00-459-7818
Part Number
55LH7644-144
Description
Nut,self-locking,hexagon
CAGE
019L2

A nut having a flat bottom and 6 sides. An integral feature is incorporated for locking on the threads of a mating member. Excludes nut (1), self-locking, cap.

Part 55LH7644-144 NSN 5310-00-459-7818

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05277
FIIG:
A021A0
Concept No.:
1
App. Key:
BK
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:
U
ESD:
ESD:
MMAC:
CRITL:
X

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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