Model: MS21078-4K

Plate Self-locking Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque with nonmetallic insert
Mounting Hole Diameter
Between 0.098 inches and 0.103 inches
Nut Style
Plate
Nut Length
1.296 inches
Nut Height
Between 0.240 inches and 0.375 inches
Plate Thickness
0.075 inches
Plate Width
Between 0.484 inches and 0.516 inches
Nut Mounting Provision
Countersunk holes
Mounting Provision Location
Opposite nut projection side
Mounting Hole Arrangement Style
2 holes
Distance From Aperture Center To Mounting Hole Center
Between 0.495 inches and 0.505 inches
Center To Center Distance Between Mounting Holes Along Length
Between 0.998 inches and 1.002 inches
Tempurature Rating
250.0 degrees fahrenheit
Thread Series
Unjf
Thready Qty Per Inch (tpi)
28
Hardness Rating
32.0 rockwell c
Thread Size
0.250 inches
Mounting Hole Countersink Angle
Between 98.0 degrees and 102.0 degrees
Material
Plastic polyamide locking insert
Material
Steel nut
Surface Treatment
Cadmium except insert and chromate except insert
Surface Treatment Specification
Qq-p-416, type 2, class 3 federal specification single treatment response except insert
NSN
5310-00-728-5512
Part Number
MS21078-4K
Description
Nut,self-locking,plate
CAGE
80205

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 MS21078-4K NSN 5310-00-728-5512

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

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
--
WCC:
713
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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