61-1781

View detailed technical data, stock status, and sourcing information for: 61-1781
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-944-2603

Item Name Code

15933

Assigment Date

02/09/1966 (60 years ago)

A washer, round in shape, having a centrally located hole. One bearing surface is flat, the other surface is in the form of a raised shoulder (boss) having a flat bearing surface. Either or both of the bearing surfaces must be broken by a counterbore, countersink, or similar shaped recess. The thickness of the shoulder (boss) must not exceed 25 percent of the shoulder (boss) diameter. For items having a shoulder (boss) of greater thickness, use bearing, sleeve; bushing, sleeve; or spacer, sleeve. Excludes:insulator, washer and thrust type washers.

0.750 inches nominal outside diameter, 0.377 inches minimum and 0.378 inches maximum hole diameter, 0.023 inches minimum and 0.026 inches maximum recess depth, 0.590 inches minimum and 0.595 inches maximum recess diameter, 0.082 inches minimum and 0.085 inches maximum overall height

Product Characteristics

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

Hole Diameter: 0.377 inches minimum and 0.378 inches maximum
Outside Diameter: 0.750 inches nominal
Overall Height: 0.082 inches minimum and 0.085 inches maximum
Recess Diameter: 0.590 inches minimum and 0.595 inches maximum
Recess Depth: 0.023 inches minimum and 0.026 inches maximum
Part Name Assigned By Controlling Agency: navy special project
Material: steel comp 303 overall
Style Designator: recessed

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
61-1781	Recessed Washer

FAQs

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

What is the FSCG of the NSN 5310-00-944-2603?

The FSCG of the NSN 5310-00-944-2603 is 5310

Does the NSN 5310-00-944-2603 have a Schedule B code assigned?

Yes, the Schedule B code is 7318220000

Does NSN 5310-00-944-2603 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 5310-00-944-2603 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-00-944-2603 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 5310-00-944-2603 was assigned to the Federal Catalog?

It was assigned 60 years ago, on Wed, Feb 9, 1966