5305-00-434-6888

Find complete technical information, availability, and procurement data for: 5305-00-434-6888
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-434-6888

Item Name Code

06657

Assigment Date

08/17/1970 (55 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.

0.307 inches minimum and 0.317 inches maximum fastener length, 0.188 inches minimum and 0.209 inches maximum thread length, 3a thread class, flat countersunk head style, right-hand thread direction

Product Characteristics

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

Thread Class: 3a
Thread Direction: right-hand
Thread Length: 0.188 inches minimum and 0.209 inches maximum
Fastener Length: 0.307 inches minimum and 0.317 inches maximum
Head Style: flat countersunk
Head Diameter: 0.264 inches minimum and 0.268 inches maximum
Internal Drive Style: slot
Nominal Thread Diameter: 0.138 inches
Thread Quantity Per Inch: 40
Countersink Angle: 81.0 degrees minimum and 82.0 degrees maximum
Screw Material: copper alloy 360
Screw Surface Treatment: nickel
Screw Surface Treatment Document And Classification: ps 22,fscm 19315 mfr ref single treatment response
Color: black
Thread Series Designator: unf

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
250-605BN	Machine Screw
250605BN	Machine Screw
F0605BN	Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-00-434-6888?

The FSCG of the NSN 5305-00-434-6888 is 5305

Does the NSN 5305-00-434-6888 have a Schedule B code assigned?

Yes, the Schedule B code is 7415338550

Does NSN 5305-00-434-6888 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 5305-00-434-6888 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-00-434-6888 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 5305-00-434-6888 was assigned to the Federal Catalog?

It was assigned 55 years ago, on Mon, Aug 17, 1970