5305-01-439-6845

Find complete technical information, availability, and procurement data for: 5305-01-439-6845
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-439-6845

Item Name Code

01852

Assigment Date

12/17/1996 (29 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.

20.75 millimeters minimum and 21.25 millimeters maximum fastener length, right-hand thread direction, pan no. 2 head style, 4.75 millimeters minimum and 5.25 millimeters maximum thread length, 6.75 millimeters minimum and 7.25 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: 4.75 millimeters minimum and 5.25 millimeters maximum
Fastener Length: 20.75 millimeters minimum and 21.25 millimeters maximum
Head Style: pan no. 2
Head Diameter: 6.75 millimeters minimum and 7.25 millimeters maximum
Head Height: 3.25 millimeters minimum and 3.75 millimeters maximum
Locking Feature: patch threads
First Diameter From Head: 2.94 millimeters minimum and 3.06 millimeters maximum
Distance From Largest Bearing Surface Of Head To End Of First Diameter: 16.0 millimeters nominal
Internal Drive Style: cross recess type ii
Nominal Thread Diameter: 4.0 millimeters
Thread Pitch In Millimeters: 0.7
External Thread Tolerance Class: 6g
Externally Relieved Body Diameter Quantity: 1
Special Features: nylon locking element 6/6 i/a/w l-p-410 to threads
Material: steel overall
Material Document And Classification: qq-s-763 cres 300 series mil spec single material response overall
Surface Treatment: passivate overall
Surface Treatment Document And Classification: qq-p-35 type 2 mil spec single treatment response overall
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
A3167793-8	Externally Relieved Body Screw

FAQs

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

What is the FSCG of the NSN 5305-01-439-6845?

The FSCG of the NSN 5305-01-439-6845 is 5305

Does the NSN 5305-01-439-6845 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-439-6845 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 5305-01-439-6845 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-439-6845 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 5305-01-439-6845 was assigned to the Federal Catalog?

It was assigned 29 years ago, on Tue, Dec 17, 1996