Model: FFB571TYPEA4

Hexagon Castellated Plain Nut

Properties:

Thread Class
2b
Thread Direction
Right-hand
Nut Style
Castellated, hexagon
Nut Height
Between 0.274 inches and 0.288 inches
Width Across Flats
Between 0.428 inches and 0.437 inches
Thread Series
Unc
Thready Qty Per Inch (tpi)
20
Thread Size
0.250 inches
Bearing Surface Type
Washer faced
Material
Steel
Surface Treatment
Cadmium or zinc
Nondefinitive Specification/std Data
A type
NSN
5310-00-042-7132
Part Number
FFB571TYPEA4
Description
Nut,plain,castellated,hexagon
CAGE
81348

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 FFB571TYPEA4 NSN 5310-00-042-7132

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:
U
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
50.0
WCC:
573
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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