NAS1581A4T21X

View detailed technical data, stock status, and sourcing information for: NAS1581A4T21X
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-689-2043

Item Name Code

29294

Assigment Date

06/09/2020 (6 years ago)

An item designed to be interposed between a cable and its support or housing to prevent chafing caused by contraction and expansion due to changes in the ambient temperature or damage or injury from outside sources. Excludes:such items as loom, cotton sleeving, rubber blankets, grade clamps and all types of conduit and insulation sleeving,electrical.

3a thread class, 0.378 inches minimum and 0.428 inches maximum thread length, flat countersunk head style, right-hand thread direction, 1.700 inches minimum and 1.730 inches maximum fastener length

Product Characteristics

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

Thread Class: 3a
Thread Direction: right-hand
Thread Length: 0.378 inches minimum and 0.428 inches maximum
Fastener Length: 1.700 inches minimum and 1.730 inches maximum
Head Style: flat countersunk
Head Diameter: 0.350 inches minimum and 0.399 inches maximum
Grip Diameter: 0.2646 inches minimum and 0.2651 inches maximum
Internal Drive Style: offset cruciform (torque set)
End Item Identification: f16
Nominal Thread Diameter: 0.250 inches
Grip Length: 1.302 inches minimum and 1.322 inches maximum
Thread Quantity Per Inch: 28
Minimum Tensile Strength: 160000 pounds per square inch
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Surface Finish: 63.0 microinches bearing surface of head
Part Name Assigned By Controlling Agency: bolt, shear
Material: steel comp 4140 or steel comp e4340 or steel comp 8740 overall
Material Document And Classification: mil-s-5626 mil spec 1st material response or mil-s-5000 mil spec 2nd material response or mil-s-6049 mil spec 3rd material response overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416 ty 2 cl 2 fed spec single treatment response overall
Thread Series Designator: unjf
Specification/Standard Data: 80205-nas1581 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
NAS1581A4T21X	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-689-2043?

The FSCG of the NSN 5305-01-689-2043 is 5305

Does the NSN 5305-01-689-2043 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-689-2043 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 5305-01-689-2043 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-689-2043 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 5305-01-689-2043 was assigned to the Federal Catalog?

It was assigned 6 years ago, on Tue, Jun 9, 2020