NAS1581C5R21

View detailed technical data, stock status, and sourcing information for: NAS1581C5R21
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-484-1264

Item Name Code

29294

Assigment Date

04/19/2001 (25 years ago)

right-hand thread direction, flat countersunk head style, 0.501 inches nominal thread length, 3a thread class, 1.798 inches minimum and 1.828 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: 0.501 inches nominal
Fastener Length: 1.798 inches minimum and 1.828 inches maximum
Head Style: flat countersunk
Head Diameter: 0.4289 inches minimum and 0.4787 inches maximum
Grip Diameter: 0.3110 inches minimum and 0.3120 inches maximum
Internal Drive Style: offset cruciform (torque set)
End Item Identification: b1-bacft
Nominal Thread Diameter: 0.3125 inches
Grip Length: 1.240 inches minimum and 1.260 inches maximum
Thread Quantity Per Inch: 24
Minimum Tensile Strength: 160000 pounds per square inch
Countersink Angle: 99.0 degrees minimum
Material: iron alloy 660 overall
Surface Treatment Document And Classification: qq-p-416 ty2 cl3 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
NAS1581C5R21	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-484-1264?

The FSCG of the NSN 5305-01-484-1264 is 5305

Does the NSN 5305-01-484-1264 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-484-1264 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 5305-01-484-1264 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-484-1264 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 5305-01-484-1264 was assigned to the Federal Catalog?

It was assigned 25 years ago, on Thu, Apr 19, 2001