Model: 20640-A

Hexagon Plain Nut

Properties:

Thread Class
2b
Thread Direction
Right-hand
Nut Style
Hexagon
Nut Height
0.484 inches
Width Across Flats
0.875 inches
Thread Series
Unc
Thready Qty Per Inch (tpi)
13
Thread Size
0.500 inches
Criticality Code Justification
Zzzy
Bearing Surface Type
Washer faced
Bearing Surface Finish
125.0 microinches
Material
Cobalt alloy
Reference Number Differentiating Characteristics
As differentiated by material in accordance with activity hxquality control, manufacturing and testing specifications
NSN
5310-00-914-6901
Part Number
20640-A
Description
Nut,plain,hexagon
CAGE
04537

A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

Part 20640-A NSN 5310-00-914-6901

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
01857
FIIG:
A021A0
Concept No.:
1
App. Key:
AG
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:
Y

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093470
UFC:
48940
LTL:
70.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 8105900000
  • SITC: 69981
  • End Use: Finished metal shapes
  • NAICS: 331491
  • USDA: 1

Freight Class: Cobalt, wrought, and articles thereof

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