Model: MS21025-28

Hexagon Castellated Plain Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Nut Style
Castellated, hexagon
Nut Height
Between 0.562 inches and 0.578 inches
Width Across Flats
Between 2.125 inches and 2.141 inches
Thread Series
Un
Thready Qty Per Inch (tpi)
16
Hardness Rating
Between 30.0 rockwell c and 34.0 rockwell c
Thread Size
1.750 inches
Countersink Angle
110.0 degrees nut
Bearing Surface Type
Washer faced
Bearing Surface Finish
32.0 microinches
Material
Steel comp 4140 or steel comp 8740
Material Specification
66 federal standard all material responses
Surface Treatment
Cadmium
Surface Treatment Specification
Qq-p-416, type 2, cl 3 federal specification single treatment response
Nondefinitive Specification/std Data
5 type
NSN
5310-00-838-0264
Part Number
MS21025-28
Description
Nut,plain,castellated,hexagon
CAGE
80205

A nut having 6 flat sides, flat on the bottom and having a slotted cylindrical or dome shaped upper portion. It is designed to provide positive locking when used with a solid or split (cotter) pin. Excludes nut (1), plain, slotted, hexagon.

Part MS21025-28 NSN 5310-00-838-0264

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
01854
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:
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:
0.2000lbs
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:
573
TCC:
Z
SHC:
9
ACC:
Construction Materials

End Items End applications NSN 5310-00-838-0264 is a component of

  • 004604921
  • Aircraft Structural Component Support
  • 010883669
  • Cargo-transport Helicopter
  • 001051580
  • Retractable Landing Gear
  • 001051581
  • Retractable Landing Gear
  • 011354639
  • Retractable Landing Gear
  • 011392397
  • Retractable Landing Gear
  • 011069519
  • Attack Helicopter
  • 010625080
  • Retractable Landing Gear
  • 010596954
  • Retractable Landing Gear
  • 010456971
  • Retractable Landing Gear
  • 010456972
  • Retractable Landing Gear
  • 006013831
  • Retractable Landing Gear
  • 006013832
  • Retractable Landing Gear
  • 005907299
  • Landing Gear Axle
  • 011069519
  • Attack Helicopter
  • 004604920
  • Aircraft Structural Component Support
  • 004094733
  • Retractable Landing Gear

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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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