5305-00-285-5268

Find complete technical information, availability, and procurement data for: 5305-00-285-5268
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-285-5268

Item Name Code

06660

Assigment Date

01/01/1963 (63 years ago)

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

0.563 inches maximum thread length, 0.625 inches nominal fastener length, fillister head style, right-hand thread direction, 2a thread class

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 2a
Thread Direction: right-hand
Thread Length: 0.563 inches maximum
Fastener Length: 0.625 inches nominal
Head Style: fillister
Head Diameter: 0.250 inches minimum and 0.270 inches maximum
Head Height: 0.102 inches minimum and 0.113 inches maximum
Washer Quantity: 1
Internal Drive Style: cross recess type 1
Nominal Thread Diameter: 0.164 inches
Thread Quantity Per Inch: 32
Hardness Rating: 45.0 rockwell c minimum and 53.0 rockwell c maximum primary washer
Primary Washer Outside Diameter: 0.243 inches minimum and 0.257 inches maximum
Primary Washer Style: split helical ring
Primary Washer Material Thickness: 0.031 inches nominal
Surface Treatment: cadmium or zinc and chromate overall
Surface Treatment Document And Classification: qq-p-416,type 1,class 3 fed spec 1st treatment response and qq-z-325,type 2,class 3 fed spec 2nd treatment response overall
Thread Series Designator: unc

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5305-00-428-7032	No Name Available	08/12/2005
5305-00-737-2527	No Name Available	11/20/1970

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
101-221S	Assembled Washer Screw
116893	Assembled Washer Screw
593399	Assembled Washer Screw
7372527	Assembled Washer Screw

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5305-00-285-5268?

The FSCG of the NSN 5305-00-285-5268 is 5305

Does NSN 5305-00-285-5268 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 5305-00-285-5268 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-285-5268 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 5305-00-285-5268 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963