Model: KFN556-4

Extended Washer Self-locking Nut

Special Features:

Cetyl alcohol lubricant per mil-l-87132, type 1, grade a

Properties:

Thread Class

Thread Direction

Right-hand

Locking Feature

Prevailing torque all metal design

Washer Outside Diameter

0.461 inches

Overall Height

0.380 inches

Nut Style

Hexagon

Washer Thickness

Between 0.107 inches and 0.111 inches

Width Across Flats

Between 0.305 inches and 0.313 inches

Thread Series

Unjf

Thready Qty Per Inch (tpi)

Hardness Rating

Between 39.0 rockwell c and 43.0 rockwell c

Thread Size

0.250 inches

Material

Plastic polytetrafluoroethylene washer

Material

Steel comp 8740 nut or steel comp e4340 nut

Material Specification

Mil-p-19468 military specification single material response washer

Material Specification

Mil-s-6049 military specification 1st material response nut or mil-s-5000 military specification 2nd material response nut

Surface Treatment

Cadmium nut and chromate nut

Surface Treatment Specification

Qq-p-416, type 2, cl 2 federal specification single treatment response nut

NSN

5310-01-223-6530

Part Number

KFN556-4

Description

Nut,self-locking,extended Washer

CAGE

92215

A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery. An integral feature is incorporated for locking on the threads of a mating member.

Part KFN556-4 NSN 5310-01-223-6530

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

29730

FIIG:

A021A0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

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:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

WCC:

573

TCC:

SHC:

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