Model: 310-0290-00

Lock Washer

Properties:

Hole Diameter

Between 0.318 inches and 0.328 inches

Outside Diameter

0.586 inches

Material Thickness

Between 0.078 inches and 0.088 inches

Hardness Rating

Between 35.0 rockwell c and 45.0 rockwell c or 45.0 rockwell c and 53.0 rockwell c

Material

Steel comp 302 and steel comp 420

Material Specification

Fed standard 66, aisi 302 or sae 30302 federal standard 1st material response and federal standard 66, aisi 420 or sae 51420 federal standard 2nd material response

Surface Treatment

Passivate

Surface Treatment Specification

Qq-p-35 federal specification single treatment response

Style Designator

Split helical-right hand

Nondefinitive Specification/std Data

2 style and c class

NSN

5310-00-042-6759

Part Number

310-0290-00

Description

Washer,lock

CAGE

13499

A washer which is usually round with a centrally located hole. Its edges and two bearing surfaces are so designed that applied pressure brings into play the spring tension and/or frictional locking principle which materially resists any tendency toward turning. It may be made of one or two pieces

Part 310-0290-00 NSN 5310-00-042-6759

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

14218

FIIG:

A022B0

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:

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Schedule B and Export

Schedule B: 7318210000
SITC: 69422
End Use: Finished metal shapes
NAICS: 332722
USDA: 1

Freight Class: Spring washers and other lock washers, iron or steel