Model: 420994

Assembled Washer Screw

Properties:

Thread Class

Thread Direction

Right-hand

Thread Length

Between 0.716 inches and 0.852 inches

Fastener Length

0.875 inches

Head Style

Round

Head Diameter

Between 0.443 inches and 0.472 inches

Head Height

Between 0.160 inches and 0.175 inches

Washer Quantity

Internal Drive Style

Cross recess type 1

Thread Diameter

0.250 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 0.460 inches and 0.475 inches

Primary Washer Style

Flat external teeth

Primary Washer Material Thickness

Between 0.023 inches and 0.028 inches

Material

Steel comp 1010 or steel comp 1011 or steel comp 1013 or steel comp 1015 or steel comp 1016 or steel comp 1017 or steel comp 1018 or steel comp 1019 or steel comp 1020 or steel comp 1050 or steel comp 1551 or steel comp 1552 or steel comp 1053 or steel comp 1054 or steel comp 1055 or steel comp 1059 or steel comp 1060 or steel comp 1561 or steel comp 1566

Material Specification

Sae assn standard all material responses

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

Unc

NSN

5305-00-042-0994

Part Number

420994

Description

Screw,assembled Washer

CAGE

21450

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

Part 420994 NSN 5305-00-042-0994

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