Model: 99-1987

Square Plain Nut

Properties:

Thread Class
2b
Thread Direction
Right-hand
Nut Style
Square
Nut Height
0.250 inches
Width Across Flats
0.500 inches
Thread Series
Unc
Thready Qty Per Inch (tpi)
18
Thread Size
0.312 inches
Bearing Surface Type
Flat
Material
Steel
NSN
5310-00-914-3225
Part Number
99-1987
Description
Nut,plain,square
CAGE
99167

A nut, flat on top and bottom, having 4 flat sides. 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 99-1987 NSN 5310-00-914-3225

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
01858
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:
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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