549-3664-002

View detailed technical data, stock status, and sourcing information for: 549-3664-002
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5340 Commercial Hardware

National Stock Number

5340-00-939-2651

Item Name Code

40280

Assigment Date

11/16/1965 (60 years ago)

A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

qq-a-200/8 fed spec single material response overall material document and classification, 0.188 inches nominal width across flats, 0.529 inches minimum and 0.533 inches maximum length, aluminum alloy 6061 overall material, hexagon cross-sectional shape

Product Characteristics

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

Length: 0.529 inches minimum and 0.533 inches maximum
Cross-Sectional Shape: hexagon
Width Across Flats: 0.188 inches nominal
Material: aluminum alloy 6061 overall
Material Document And Classification: qq-a-200/8 fed spec single material response overall
Surface Treatment: chromate overall
Surface Treatment Document And Classification: mil-c-5541, class 1a mil spec 1st treatment response or mil-c-5541, class 3 fed spec 2nd treatment response overall
Style Designator: internally threaded full length

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
549-3664-002	Spacing Threaded Standoff

FAQs

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

What is the FSCG of the NSN 5340-00-939-2651?

The FSCG of the NSN 5340-00-939-2651 is 5340

Does NSN 5340-00-939-2651 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 5340-00-939-2651 contain precious materials?

Item does not contain precious metal.

Does NSN 5340-00-939-2651 contain hazardous materials?

Indicates there is no information in the hmirs. The nsn is in a fsc in table ii of fed std 313 and a msds may be required by the user. The requirement for a msds is dependent on a hazard determination of the supplier or the intended end use of item.

When the NSN 5340-00-939-2651 was assigned to the Federal Catalog?

It was assigned 60 years ago, on Tue, Nov 16, 1965