MS21077-8

View detailed technical data, stock status, and sourcing information for: MS21077-8
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-688-1998

Item Name Code

05280

Assigment Date

01/01/1963 (63 years ago)

dry film lubricant lubrication, 0.161 inches minimum and 0.166 inches maximum mounting hole diameter, prevailing torque with nonmetallic insert locking feature, right-hand thread direction, 3b thread class

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 with nonmetallic insert
Lubrication: dry film lubricant
Mounting Hole Diameter: 0.161 inches minimum and 0.166 inches maximum
Nut Style: plate
Nut Length: 1.602 inches maximum
Nut Height: 0.630 inches maximum
Plate Thickness: 0.115 inches maximum
Plate Width: 0.859 inches maximum
Nut Mounting Provision: straight holes
Mounting Hole Arrangement Style: 2 holes
Distance From Aperture Center To Mounting Hole Center: 0.625 inches nominal
Center To Center Distance Between Mounting Holes Along Length: 1.248 inches minimum and 1.252 inches maximum
Temp Rating: 250.0 fahrenheit nominal
Thread Series: unjf
Features Provided: floating nut
Thread Quantity Per Inch: 20
Nominal Thread Size: 0.500 inches
Countersink Angle: 120.0 degrees nominal nut
Material: aluminum alloy or steel shell
Material: plastic polyamide (nylon) locking insert
Material: steel nut
Surface Treatment: anodize or chromate or cadmium shell
Surface Treatment: cadmium nut
Surface Treatment Document And Classification: mil-a-8625 mil spec 2nd treatment response or mil-c-5541 mil spec 2nd treatment response or qq-p-416 ty 2 cl 1 fed spec 2nd treatment response or qq-p-416 ty 2 cl 2 fed spec 2nd treatment response or qq-p-416 ty 2 cl 3 fed spec 2nd treatment response shell
Surface Treatment Document And Classification: qq-p-416 ty 2 cl 1 fed spec 1st treatment response or qq-p-416 ty 2 cl 2 fed spec 1st treatment response or qq-p-416 ty 2 cl 3 fed spec 1st treatment response nut

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN	Name	Date
5310-00-584-3788	No Name Available	01/01/1963

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
879363-00	Plate Self-Locking Nut
FNA401Q-080	Plate Self-Locking Nut
MS21077-8	Plate Self-Locking Nut
NAS1031N8	Plate Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-688-1998?

The FSCG of the NSN 5310-00-688-1998 is 5310

Does the NSN 5310-00-688-1998 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-688-1998 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 5310-00-688-1998 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-688-1998 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 5310-00-688-1998 was assigned to the Federal Catalog?

It was assigned 63 years ago, on Tue, Jan 1, 1963