Model: 420496

Assembled Washer Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.344 inches and 0.437 inches

Fastener Length

Between 0.406 inches and 0.437 inches

Head Style

Round

Head Diameter

Between 0.287 inches and 0.309 inches

Head Height

Between 0.107 inches and 0.119 inches

Washer Quantity

Internal Drive Style

Slot

Thread Diameter

0.164 inches

Thready Qty Per Inch (tpi)

Hardness Rating

40.0 rockwell c primary washer and 50.0 rockwell c primary washer

Primary Washer Outside Diameter

Between 0.327 inches and 0.338 inches

Primary Washer Style

Flat internal teeth

Primary Washer Material Thickness

Between 0.018 inches and 0.023 inches

Material

Steel

Material Specification

Sae assn standard all material responses primary washer

Surface Treatment

Cadmium fastener or zinc fastener

Surface Treatment

Cadmium primary washer or zinc primary washer

Thread Series Designator

Unc

NSN

5305-01-158-7821

Part Number

420496

Description

Screw,assembled Washer

CAGE

21450

A screw, (as modified) to which has been assembled one or more nonremovable washer(s).

Part 420496 NSN 5305-01-158-7821

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

06660

FIIG:

A003B0

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:

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:

713

TCC:

SHC:

ACC:

Construction Materials

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Schedule B and Export

Schedule B: 7318152000
SITC: 69421
End Use: Iron and steel products, other
NAICS: 332722
USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment