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424321 Assembled Washer Screw

5305-00-042-4321

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Official Item Classification

Name
Assembled Washer Screw
Part Number
424321
(NSN) National Stock Number
5305-00-042-4321
(FSG) Federal Supply Group
53 Hardware and Abrasives
(FSC) Federal Supply Classification
5305 Screws
(INC) Item Name Code
06660
(FIIG) Federal Item Identification Guide
A003B0
Date
01/01/1963 (63 years ago)

round head style, right-hand thread direction, 2a thread class, 0.281 inches minimum and 0.312 inches maximum fastener length, 0.202 inches minimum and 0.294 inches maximum thread length

Specs & Compatibility

Thread Class

2a

Thread Direction

right-hand

Thread Length

0.202 inches minimum and 0.294 inches maximum

Fastener Length

0.281 inches minimum and 0.312 inches maximum

Head Style

round

Head Diameter

0.287 inches minimum and 0.309 inches maximum

Head Height

0.107 inches minimum and 0.120 inches maximum

Washer Quantity

1

Internal Drive Style

cross recess type 1

Nominal Thread Diameter

0.164 inches

Thread Quantity Per Inch

36

Hardness Rating

40.0 rockwell c minimum and 50.0 rockwell c maximum primary washer

Primary Washer Outside Diameter

0.305 inches minimum and 0.320 inches maximum

Primary Washer Style

flat external teeth

Primary Washer Material Thickness

0.018 inches minimum and 0.023 inches maximum

Material

steel overall

Material Document And Classification

sae assn std single material response overall

Surface Treatment

cadmium or zinc overall

Surface Treatment Document And Classification

qq-p-416,ty 1,cl 3 fed spec 1st treatment response or qq-z-325,ty 1,cl 3 fed spec 2nd treatment response overall

Thread Series Designator

unf

Regulatory Compliance

Precious Metals Indicator
U

Precious metal content is unknown

Criticality Code
X

The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Hazardous Metals Indicator
N

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

Pseudo Item Name Code

0006660

Related Hardware Products

Part Number Description
424321 Assembled Washer Screw

Frequently Asked Questions

What is the FSCG of the NSN 5305-00-042-4321?
The FSCG of the NSN 5305-00-042-4321 is 5305
Does the NSN 5305-00-042-4321 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-00-042-4321 require demilitarization?
Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.
Does NSN 5305-00-042-4321 contain precious materials?
Precious metal content is unknown
Does NSN 5305-00-042-4321 contain hazardous materials?
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
When the NSN 5305-00-042-4321 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Tue, Jan 1, 1963