5305-01-121-2689

Find complete technical information, availability, and procurement data for: 5305-01-121-2689
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-121-2689

Item Name Code

06660

Assigment Date

11/04/1981 (44 years ago)

An externally threaded fastener whose threaded and unthreaded portions are of one nominal diameter and are separated by a narrow circumferential groove. The head is designed to be held or driven with an inserted driver. Excludes:bolt, shear.

right-hand thread direction, 0.202 inches minimum and 0.250 inches maximum thread length, pan no. 2 head style, 0.218 inches minimum and 0.250 inches maximum fastener length, 2a 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: 2a
Thread Direction: right-hand
Thread Length: 0.202 inches minimum and 0.250 inches maximum
Fastener Length: 0.218 inches minimum and 0.250 inches maximum
Head Style: pan no. 2
Head Diameter: 0.306 inches minimum and 0.322 inches maximum
Head Height: 0.085 inches minimum and 0.096 inches maximum
Washer Quantity: 2
Internal Drive Style: offset cruciform (torque set)
Nominal Thread Diameter: 0.164 inches
Thread Quantity Per Inch: 32
Minimum Tensile Strength: 55000 pounds per square inch
Secondary Washer Relationship To Primary Washer: not identical
Secondary Washer Style: flat
Primary Washer Outside Diameter: 0.293 inches maximum
Secondary Washer Outside Diameter: 0.307 inches minimum and 0.317 inches maximum
Primary Washer Style: split helical ring
Primary Washer Material Thickness: 0.040 inches minimum
Secondary Washer Material Thickness: 0.013 inches minimum and 0.019 inches maximum
Material: copper alloy 510 primary washer
Material: copper alloy 230 or copper alloy 240 or copper alloy 260 or copper alloy 268 or copper alloy 342 or copper alloy 353 or copper alloy 360 or copper alloy 377 fastener
Material: copper alloy 260 or copper alloy 268 secondary washer
Material Document And Classification: qq-p-613 fed spec single material response secondary washer
Material Document And Classification: qq-p-750,comp a fed spec single material response primary washer
Surface Treatment: tin overall
Surface Treatment Document And Classification: qq-n-290 fed spec single treatment response overall
Thread Series Designator: unc
Specification/Standard Data: 80205-nas720 professional/industrial association standard

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
NAS720B8-4	Assembled Washer Screw

FAQs

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

What is the FSCG of the NSN 5305-01-121-2689?

The FSCG of the NSN 5305-01-121-2689 is 5305

Does the NSN 5305-01-121-2689 have a Schedule B code assigned?

Yes, the Schedule B code is 7415338550

Does NSN 5305-01-121-2689 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 5305-01-121-2689 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-121-2689 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 5305-01-121-2689 was assigned to the Federal Catalog?

It was assigned 44 years ago, on Wed, Nov 4, 1981