Model: 55LH7940-048

Barrel Self-locking Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque all metal design
Counterbore Diameter
0.291 inches nut
Nut Style
Floating self-locking barrel
Nut Diameter
Between 0.525 inches and 0.528 inches
Nut Length
Between 0.615 inches and 0.635 inches
Nut Height
0.406 inches
Nut Counterbore Depth
0.115 inches nut and 0.135 inches nut
Tempurature Rating
Between -65.0 degrees fahrenheit and 450.0 degrees fahrenheit
Thread Series
Unjf
Features Provided
Floating nut
Thready Qty Per Inch (tpi)
28
Hardness Rating
Between 40.0 rockwell c and 45.0 rockwell c
Thread Size
0.250 inches
Material
Steel comp 4340
Material Specification
Aisi assn standard single material response
Surface Treatment
Cadmium
Surface Treatment Specification
Qq-p-416, type 2, cl 2 federal specification single treatment response
NSN
5310-00-412-0017
Part Number
55LH7940-048
Description
Nut,self-locking,barrel
CAGE
019L2

A nut of cylindrical or partly cylindrical cross-section with integral threads perpendicular to the axial centerline. Ends may be flat or flanged. An integral feature is incorporated for locking on the threads of a mating member. Excludes nut (1), self-locking, round.

Part 55LH7940-048 NSN 5310-00-412-0017

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
15891
FIIG:
A021A0
Concept No.:
1
App. Key:
BH
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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