Model: 21AX638

Hexagon Self-locking Nut

Special Features:

Material: steel with nylon insert

Properties:

Thread Class
3b
Thread Direction
Right-hand
Nut Height
0.909 inches
Width Across Flats
1.014 inches
Thread Series
Unf
Thready Qty Per Inch (tpi)
20
Thread Size
0.500 inches
Part Name Assigned By Controlling Agency
Nut, hex lock
Material
Steel
NSN
5310-01-552-7972
Part Number
21AX638
Description
Nut,self-locking,hexagon
CAGE
89619

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 21AX638 NSN 5310-01-552-7972

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:
A
ESD:
A
ESD:
A
MMAC:
CRITL:
X

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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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