Model: EK1BS428C

Cap Self-locking Nut

Properties:

Thread Class

Thread Direction

Right-hand

Locking Feature

Prevailing torque all metal design or prevailing torque with nonmetallic insert

Nut Style

Cap

Nut Height

Between 0.433 inches and 0.437 inches

Width Across Flats

Between 0.433 inches and 0.440 inches

Thread Series

Unf

Thready Qty Per Inch (tpi)

Thread Size

0.250 inches

Countersink Angle

90.0 degrees nut

Bearing Surface Type

Washer faced

Part Name Assigned By Controlling Agency

Navy special project

Material

Steel

Surface Treatment

Cadmium

NSN

5310-00-402-7963

Part Number

EK1BS428C

Description

Nut,self-locking,cap

CAGE

26233

A nut internally threaded from one end, and completely enclosed on the opposite end. The outer periphery parallel to the threaded axis may be square, cylindrical, hexagonal, octagonal, dodecagonal or the like and taper to a cone or dome shape on the closed end. An integral feature is incorporated for locking on the threads of a mating memeber. Excludes nut (1), stamped.

Part EK1BS428C NSN 5310-00-402-7963

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

05275

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:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

50.0

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