Model: EB-428

Extended Washer Self-locking Nut

Properties:

Thread Class

Thread Direction

Right-hand

Locking Feature

Prevailing torque with nonmetallic insert

Washer Outside Diameter

Between 0.521 inches and 0.531 inches

Overall Height

0.334 inches

Nut Style

Double hexagon

Washer Thickness

0.090 inches

Width Across Flats

Between 0.362 inches and 0.377 inches

Tempurature Rating

250.0 degrees fahrenheit

Thread Series

Unjf

Thready Qty Per Inch (tpi)

Thread Size

0.250 inches

Material

Steel comp 4130 or steel comp 4340 or steel comp 3140 or steel comp 8740

Material Specification

Aisi4130 assn standard single material response or aisi4340 assn standard single material response or aisi3140 assn standard single material response or sae8740 assn standard single material response

Surface Treatment

Cadmium except insert and chromate except insert

Surface Treatment Specification

Qq-p-416, type 2, class 3 federal specification single treatment response

NSN

5310-00-488-9137

Part Number

EB-428

Description

Nut,self-locking,extended Washer

CAGE

15653

A nut having 12 drive points, 24 sides, and an integral washer which extends beyond the points or periphery. An integral feature is incorporated for locking on the threads of a mating member.

Part EB-428 NSN 5310-00-488-9137

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

29729

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