Model: 21FK632

Hexagon Self-locking Nut

Properties:

Thread Class
2b
Thread Direction
Right-hand
Locking Feature
Prevailing torque all metal design
Nut Style
Hexagon
Nut Height
Between 0.121 inches and 0.141 inches
Width Across Flats
0.313 inches
Thread Series
Unc
Thready Qty Per Inch (tpi)
32
Thread Size
0.138 inches
Bearing Surface Type
Flat
Material
Steel comp 1117
Material Specification
Aisi assn standard single material response
Surface Treatment
Cadmium
NSN
5310-00-731-3564
Part Number
21FK632
Description
Nut,self-locking,hexagon
CAGE
56878

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 21FK632 NSN 5310-00-731-3564

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:
50.0
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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