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5305-00-042-5581

Assembled Washer Screw

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Official Item Classification

Name
Assembled Washer Screw
(NSN) National Stock Number
5305-00-042-5581
(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)

0.719 inches minimum and 0.750 inches maximum fastener length, 0.648 inches minimum and 0.719 inches maximum thread length, hexagon head style, right-hand thread direction, 2a thread class

Specs & Compatibility

Thread Class

2a

Thread Direction

right-hand

Thread Length

0.648 inches minimum and 0.719 inches maximum

Fastener Length

0.719 inches minimum and 0.750 inches maximum

Head Style

hexagon

Head Height

0.172 inches minimum and 0.190 inches maximum

Width Between Flats

0.428 inches minimum and 0.437 inches maximum

Washer Quantity

1

Internal Drive Style

slot

Nominal Thread Diameter

0.250 inches

Thread Quantity Per Inch

28

Primary Washer Outside Diameter

0.460 inches minimum and 0.475 inches maximum

Primary Washer Style

flat external teeth

Primary Washer Material Thickness

0.023 inches minimum and 0.028 inches maximum

Material

steel comp 1010 or steel comp 1020 or steel comp 1050 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.

Source of Supply Code

SMS

Pseudo Item Name Code

0006660

Related Hardware Products

Part Number Description
425581 Assembled Washer Screw
5305000425581 Assembled Washer Screw

Frequently Asked Questions

What is the FSCG of the NSN 5305-00-042-5581?
The FSCG of the NSN 5305-00-042-5581 is 5305
Does the NSN 5305-00-042-5581 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-00-042-5581 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 5305-00-042-5581 contain precious materials?
Precious metal content is unknown
Does NSN 5305-00-042-5581 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 5305-00-042-5581 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Tue, Jan 1, 1963