1802-070U

View detailed technical data, stock status, and sourcing information for: 1802-070U

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1802-070U
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5310 Nuts and Washers
National Stock Number
5310-00-493-4020
Item Name Code
05277
Assigment Date
02/20/1970 (56 years ago)

A washer or cone or disk shape with a centrally located hole, designed to accommodate a flat or oval head screw and provide additional bearing area on the material being fastened. It may or may not have a flush flange feature.

0.421 inches minimum and 0.469 inches maximum nut height, 3b thread class, prevailing torque all metal design locking feature, right-hand thread direction, hexagon nut style

Product Characteristics

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

Thread Class
3b
Thread Direction
right-hand
Locking Feature
prevailing torque all metal design
Nut Style
hexagon
Nut Height
0.421 inches minimum and 0.469 inches maximum
Width Across Flats
0.679 inches minimum and 0.690 inches maximum
Temp Rating
1200.0 fahrenheit nominal
Thread Series
unjf
Thread Quantity Per Inch
20
Nominal Thread Size
0.438 inches
Countersink Angle
88.0 degrees nominal nut
Bearing Surface Type
chamfered
Bearing Surface Finish
125.0 microinches
Material
steel uns s34720 or steel uns s34723 overall
Material Document And Classification
ams 5642 s34720/s34723 assn std single material response overall
Precious Material And Location
all surfaces silver
Precious Material
silver
Surface Treatment
silver overall
Surface Treatment Document And Classification
ams 2410 assn std single treatment response overall

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN Name Date
5310-00-298-2748 No Name Available 04/01/1984
5310-00-596-5811 No Name Available 02/01/1983

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
1802-070U Hexagon Self-Locking Nut
5310002982748 Hexagon Self-Locking Nut
MS20500-720A Hexagon Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-493-4020?
The FSCG of the NSN 5310-00-493-4020 is 5310
Does the NSN 5310-00-493-4020 have a Schedule B code assigned?
Yes, the Schedule B code is 7318160000
Does NSN 5310-00-493-4020 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 5310-00-493-4020 contain precious materials?
Item contains silver.
Does NSN 5310-00-493-4020 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 5310-00-493-4020 was assigned to the Federal Catalog?
It was assigned 56 years ago, on Fri, Feb 20, 1970

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