Model: 424321

Assembled Washer Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.202 inches and 0.294 inches

Fastener Length

Between 0.281 inches and 0.312 inches

Head Style

Round

Head Diameter

Between 0.287 inches and 0.309 inches

Head Height

Between 0.107 inches and 0.120 inches

Washer Quantity

Internal Drive Style

Cross recess type 1

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 0.305 inches and 0.320 inches

Primary Washer Style

Flat external teeth

Primary Washer Material Thickness

Between 0.018 inches and 0.023 inches

Material

Steel

Material Specification

Sae assn standard single material response

Surface Treatment

Cadmium or zinc

Surface Treatment Specification

Qq-p-416, type 1, cl 3 federal specification 1st treatment response or qq-z-325, type 1, cl 3 federal specification 2nd treatment response

Thread Series Designator

Unf

NSN

5305-00-042-4321

Part Number

424321

Description

Screw,assembled Washer

CAGE

21450

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

Part 424321 NSN 5305-00-042-4321

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:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

093486

UFC:

48950

LTL:

RATING VARIABLE

LCL:

50.0

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