Model: MS21224-4

Assembled Washe Self-locking Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque with nonmetallic insert
Washer Outside Diameter
Between 0.520 inches and 0.5620 inches
Washer Outside Diameter
Between 0.530 inches and 0.560 inches
Counterbore Diameter
0.299 inches nut and 0.309 inches nut
Counterbore Diameter
0.299 inches and 0.309 inches nut
Overall Height
Between 0.365 inches and 0.405 inches
Overall Height
Between 0.375 inches and 0.405 inches
Nut Style
Flat with turned back edge
Nut Height
Any acceptable
Nut Height
0.125 inches
Nut Counterbore Depth
0.172 inches nut and 0.192 inches nut
Nut Counterbore Depth
0.172 inches and 0.192 inches nut
Width Across Flats
Between 0.430 inches and 0.439 inches
Tempurature Rating
250.0 degrees fahrenheit
Thread Series
Unjf
Thready Qty Per Inch (tpi)
28
Hardness Rating
Not rated
Thread Size
0.250 inches
Bearing Surface Finish
125.0 microinches
Material
Plastic nylon locking insert
Material
Steel comp 1137 nut or steel comp 11l37 nut or steel comp 8740 nut
Material
Steel comp 1137 or steel comp 11l37 or steel comp 8740 nut
Material Specification
Ams 5024 assn standard 1st material response nut or ams 5020 assn standard 2nd material response nut or ams 6322 assn standard 3rd material response nut or ams 6323 assn standard 3rd material response nut or ams 6325 assn standard 3rd material response nut or ams 6327 assn standard 3rd material response nut or ams 6358 assn standard 3rd material response nut
Material Specification
Qq-a-225/6, t4 federal specification 1st material response washer or qq-a-250/13, t6 federal specification 2nd material response washer
Material Specification
Qq-a-225/6, t4 federal specification 1st material response or qq-a-250/13, t6 federal specification 2nd material response washer
Material Specification
Ams 5024 assn standard 1st material response or ams 5020 assn standard 2nd material response or ams 6322 assn standard 3rd material response or ams 6323 assn standard 3rd material response or ams 6325 assn standard 3rd material response or ams 6327 assn standard 3rd material response or ams 6358 assn standard 3rd material response nut
Surface Treatment
Chromate washer
Surface Treatment
Cadmium nut and chromate nut
Surface Treatment
Cadmium and chromate nut
Surface Treatment Specification
Qq-p-416, type 2, cl 2 federal specification single treatment response nut
NSN
5310-00-151-5431
Part Number
MS21224-4
Description
Nut,self-locking,assembled Washe
CAGE
80205

A nut on which has been assembled a nonremovable washer. An integral feature is incorporated for locking on the threads of a mating member.

Part MS21224-4 NSN 5310-00-151-5431

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
29736
FIIG:
A021A0
Concept No.:
1
App. Key:
BG
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:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
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:
013540
UFC:
05680
LTL:
70.0
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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