Model: 21581-01

Round Plain Nut

Properties:

Thread Class
2b
Thread Direction
Right-hand
Drive Point Depth
Between 0.109 inches and 0.141 inches
Nut Style
Round
Nut Diameter
Between 0.625 inches and 0.630 inches
Nut Thickness
Between 0.484 inches and 0.516 inches
Drive Point Width
0.047 mils and 0.078 centimeters
Drive Point Quantity
2
Thread Series
Unf
Thready Qty Per Inch (tpi)
20
Thread Size
0.500 inches
Material
Copper alloy 510 or copper alloy 524 or copper alloy 544
Material Specification
Qq-b-750 federal specification all material responses
NSN
5310-00-637-0534
Part Number
21581-01
Description
Nut,plain,round
CAGE
35351

A nut, circular in shape, which may have wrenching facilities such as flats, holes, protrusions, slots or splines in or on the periphery or in the face opposite the bearing surface. For items having a thickness (or height) exceeding two times the outside diameter, use post, electrical-mechanical equipment. See also nut (1), plain, knurled. (when height or thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

Part 21581-01 NSN 5310-00-637-0534

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
15887
FIIG:
A021A0
Concept No.:
1
App. Key:
AY
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:
093460
UFC:
48930
LTL:
70.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7415290000
  • SITC: 69432
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Copper screws, nuts, bolts, rivets, and other fasteners not threaded

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