Model: KFN512C4

Assembled Washe Self-locking Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque all metal design
Washer Outside Diameter
0.460 inches
Counterbore Diameter
0.267 inches first end and 0.272 inches first end
Overall Height
0.340 inches
Nut Style
Flat with turned up edge
Nut Counterbore Depth
0.107 inches first end and 0.117 inches first end
Width Across Flats
Between 0.306 inches and 0.316 inches
Thread Series
Unjf
Thready Qty Per Inch (tpi)
28
Hardness Rating
Between 33.0 rockwell c and 44.0 rockwell c
Thread Size
0.250 inches
Material
Iron alloy 660 nut
Material
Stainless steel washer
Material Specification
Ams 5732, a-286 assn standard 1st material response nut or ams 5737, a-286 assn standard 2nd material response nut
Material Specification
Qq-s-763, 300 series federal specification 1st material response washer or qq-s-766, 300 series federal specification 2nd material response washer
Surface Treatment
Cadmium and chromate
Surface Treatment Specification
Qq-p-416, type ii, class 2 federal specification single treatment response
NSN
5310-01-475-6869
Part Number
KFN512C4
Description
Nut,self-locking,assembled Washe
CAGE
56878

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 KFN512C4 NSN 5310-01-475-6869

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:
A
ESD:
ESD:
MMAC:
CRITL:
X

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

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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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