4000684

View detailed technical data, stock status, and sourcing information for: 4000684
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-00-419-2959

Item Name Code

22846

Assigment Date

12/02/1970 (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.

right-hand thread direction, 2a thread class, flat chamfer head style, 0.281 inches minimum thread length, 0.719 inches nominal fastener length

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: 0.281 inches minimum
Fastener Length: 0.719 inches nominal
Head Style: flat chamfer
Head Diameter: 0.312 inches nominal
Head Height: 0.095 inches nominal
Shoulder Diameter: 0.186 inches minimum and 0.187 inches maximum first shoulder
Shoulder Length: 0.391 inches minimum and 0.406 inches maximum first shoulder
Internal Drive Style: slot
Nominal Thread Diameter: 0.164 inches
Thread Quantity Per Inch: 32
Shoulder Shape: round first shoulder
Material: steel comp 1213 overall
Material Document And Classification: aisi assn std single material response overall
Surface Treatment: nickel overall
Surface Treatment Document And Classification: 20-23610 mfr ref single treatment response overall
Thread Series Designator: unc

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
4000684	Shoulder Screw

FAQs

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

What is the FSCG of the NSN 5305-00-419-2959?

The FSCG of the NSN 5305-00-419-2959 is 5305

Does the NSN 5305-00-419-2959 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-00-419-2959 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 5305-00-419-2959 contain precious materials?

Precious metal content is unknown

Does NSN 5305-00-419-2959 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 5305-00-419-2959 was assigned to the Federal Catalog?

It was assigned 55 years ago, on Wed, Dec 2, 1970