5310-00-168-2978

Find complete technical information, availability, and procurement data for: 5310-00-168-2978
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-168-2978

Item Name Code

05277

Assigment Date

09/14/1970 (55 years ago)

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes:items with bevel (conical) heads. See bolt, internal wrenching. Excludes:screw, shoulder; and screw, machine.

internal or external wrenching hexagon nut style, prevailing torque all metal design locking feature, right-hand thread direction, 3b thread class, 0.188 inches maximum nut height

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: internal or external wrenching hexagon
Nut Height: 0.188 inches maximum
Width Across Flats: 0.365 inches minimum and 0.377 inches maximum
Thread Series: unjf
Thread Quantity Per Inch: 32
Hardness Rating: 38.0 rockwell c minimum and 48.0 rockwell c maximum
Nominal Thread Size: 0.190 inches
Bearing Surface Type: chamfered
Material: iron alloy 660 overall
Material Document And Classification: ams 5525 assn std single material response overall
Precious Material And Location: external surfaces silver
Surface Treatment: silver overall
Surface Treatment Document And Classification: ams 2411 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Below is a list of NSNs that have been officially superseded by this NSN: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
5310-00-168-2884	No Name Available	09/01/1996
5310-00-168-2885	No Name Available	10/01/1996
5310-00-449-0157	No Name Available	10/01/1996

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
5310PL0633370	Hexagon Self-Locking Nut
540625	Hexagon Self-Locking Nut
661639	Hexagon Self-Locking Nut
661640	Hexagon Self-Locking Nut
661641	Hexagon Self-Locking Nut
661642	Hexagon Self-Locking Nut
H31-3	Hexagon Self-Locking Nut
H49044-3	Hexagon Self-Locking Nut

FAQs

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

What is the FSCG of the NSN 5310-00-168-2978?

The FSCG of the NSN 5310-00-168-2978 is 5310

Does the NSN 5310-00-168-2978 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-168-2978 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 5310-00-168-2978 contain precious materials?

Item contains silver.

Does NSN 5310-00-168-2978 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 5310-00-168-2978 was assigned to the Federal Catalog?

It was assigned 55 years ago, on Mon, Sep 14, 1970