5305-01-390-1880

Find complete technical information, availability, and procurement data for: 5305-01-390-1880
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-390-1880

Item Name Code

06657

Assigment Date

05/13/1994 (32 years ago)

A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use shim. For items fabricated from ceramic or electrically rated materials by specification or industry standards use insulator (1), washer. Excludes:disk, valve, graphite impregnated and lubricated items.

20.0 millimeters minimum and 21.0 millimeters maximum thread length, 20.2 millimeters minimum and 21.0 millimeters maximum fastener length, right-hand thread direction, pan head style, 5.50 millimeters minimum and 5.80 millimeters maximum head diameter

Product Characteristics

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

Thread Direction: right-hand
Thread Length: 20.0 millimeters minimum and 21.0 millimeters maximum
Fastener Length: 20.2 millimeters minimum and 21.0 millimeters maximum
Head Style: pan
Head Diameter: 5.50 millimeters minimum and 5.80 millimeters maximum
Head Height: 2.05 millimeters minimum and 2.30 millimeters maximum
Locking Feature: patch
Internal Drive Style: cross recess type 1
Nominal Thread Diameter: 3.0 millimeters
Minimum Tensile Strength: 80000 pounds per square inch
Thread Pitch In Millimeters: 0.5
External Thread Tolerance Class: 6g
Screw Material: steel
Locking Feature Material: plastic polyamide (nylon)
Screw Material Document And Classification: fed 66, 300 series fed std all material responses
Screw Surface Treatment: passivate
Screw Surface Treatment Document And Classification: qq-p-35 fed spec single treatment response
Color: black
Thread Series Designator: m

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
3140089-3	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-01-390-1880?

The FSCG of the NSN 5305-01-390-1880 is 5305

Does NSN 5305-01-390-1880 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 5305-01-390-1880 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-390-1880 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 5305-01-390-1880 was assigned to the Federal Catalog?

It was assigned 32 years ago, on Fri, May 13, 1994