Model: MS21087-4K

Plate Self-locking Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque all metal design
Counterbore Diameter
0.254 inches nut
Lubrication
Dry film lubricant
Mounting Hole Diameter
Between 0.098 inches and 0.103 inches
Nut Style
Plate
Nut Length
0.591 inches
Nut Height
0.281 inches
Plate Thickness
0.055 inches
Plate Width
Between 0.380 inches and 0.414 inches
Nut Mounting Provision
Countersunk holes or dimpled holes
Mounting Hole Arrangement Style
2 holes
Distance From Aperture Center To Mounting Hole Center
Between 0.276 inches and 0.286 inches
Center To Center Distance Between Mounting Holes Along Width
Between 0.217 inches and 0.221 inches
Tempurature Rating
400.0 degrees fahrenheit
Thread Series
Unf
Thready Qty Per Inch (tpi)
28
Hardness Rating
49.0 rockwell c
Thread Size
0.250 inches
Material
Iron alloy 660
Material Specification
Ams 5735 assn standard single material response or ams 5737 assn standard single material response
Precious Material And Location
All surfaces silver
Precious Material
Silver
Surface Treatment
Silver
Surface Treatment Specification
Ams 2410 assn standard single treatment response
NSN
5310-01-328-7912
Part Number
MS21087-4K
Description
Nut,self-locking,plate
CAGE
96906

A nut with a flanged base of varied shapes which may be plain or mounted by rivets, bolts, welding or integral prongs. An integral feature is incorporated for locking on the threads of a mating member.

Part MS21087-4K NSN 5310-01-328-7912

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05280
FIIG:
A021A0
Concept No.:
1
App. Key:
BZ
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:
S
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
576
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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