R300A3

View detailed technical data, stock status, and sourcing information for: R300A3
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-021-3884

Item Name Code

05280

Assigment Date

05/10/1968 (58 years ago)

A nut with a flanged base of varied shapes which may be plain or mounted by rivets, bolts, welding or integral prongs. An integral feature is incorporated for locking on the threads of a mating member.

0.194 inches minimum nut counterbore diameter, right-hand thread direction, 3b thread class, dry film lubricant lubrication, prevailing torque all metal design locking feature

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
Counterbore Diameter: 0.194 inches minimum nut
Lubrication: dry film lubricant
Mounting Hole Diameter: 0.098 inches minimum and 0.103 inches maximum
Nut Style: plate
Nut Length: 0.521 inches maximum
Nut Height: 0.250 inches maximum
Plate Thickness: 0.047 inches maximum
Plate Width: 0.298 inches minimum and 0.328 inches maximum
Nut Counterbore Depth: 0.062 inches minimum nut
Nut Mounting Provision: straight holes
Mounting Hole Arrangement Style: 2 holes
Distance From Aperture Center To Mounting Hole Center: 0.245 inches minimum and 0.255 inches maximum
Center To Center Distance Between Mounting Holes Along Width: 0.217 inches minimum and 0.221 inches maximum
Temp Rating: 450.0 fahrenheit nominal
Thread Series: unjf
Thread Quantity Per Inch: 32
Hardness Rating: 49.0 rockwell c maximum
Nominal Thread Size: 0.190 inches
Material: steel overall
Surface Treatment: cadmium and chromate overall except insert
Surface Treatment Document And Classification: qq-p-416,ty 1,cl 3 fed spec 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Below is a list of NSNs that have been officially superseded by this NSN: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
5310-00-070-1995	No Name Available	10/01/1988
5310-00-469-1382	No Name Available	03/01/1979

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
MA 12640-02	Plate Self-Locking Nut
MA12640NM02	Plate Self-Locking Nut
MS21086L3	Plate Self-Locking Nut
MT13S1032	Plate Self-Locking Nut
NAS1076A3	Plate Self-Locking Nut
R300A3	Plate Self-Locking Nut
RM52LHTA575M-02	Plate Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-021-3884?

The FSCG of the NSN 5310-00-021-3884 is 5310

Does the NSN 5310-00-021-3884 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-021-3884 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 5310-00-021-3884 contain precious materials?

Item does not contain precious metal.

Does NSN 5310-00-021-3884 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 5310-00-021-3884 was assigned to the Federal Catalog?

It was assigned 58 years ago, on Fri, May 10, 1968