5305-01-264-8497

Find complete technical information, availability, and procurement data for: 5305-01-264-8497
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-264-8497

Item Name Code

29294

Assigment Date

10/07/1987 (38 years ago)

A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use shim. For items fabricated from ceramic or electrically rated materials by specification or industry standards use insulator (1), washer. Excludes:disk, valve, graphite impregnated and lubricated items.

0.476 inches minimum and 0.526 inches maximum thread length, flat countersunk head style, 3a thread class, 2.611 inches minimum and 2.641 inches maximum fastener length, right-hand thread direction

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: 0.476 inches minimum and 0.526 inches maximum
Fastener Length: 2.611 inches minimum and 2.641 inches maximum
Head Style: flat countersunk
Head Diameter: 0.578 inches minimum and 0.634 inches maximum
Grip Diameter: 0.3110 inches minimum and 0.3120 inches maximum
Internal Drive Style: offset cruciform (torque set)
Nominal Thread Diameter: 0.312 inches
Grip Length: 2.611 inches minimum and 2.641 inches maximum
Thread Quantity Per Inch: 24
Minimum Tensile Strength: 160000 pounds per square inch
Hardness Rating: 36.0 rockwell c minimum and 40.0 rockwell c maximum overall
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Surface Finish: 32.0 microinches bearing surface of head
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Material: steel comp 4140 or steel comp 4340 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-nas1580 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
NAS1580A5T34	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-264-8497?

The FSCG of the NSN 5305-01-264-8497 is 5305

Does the NSN 5305-01-264-8497 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-264-8497 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 5305-01-264-8497 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-264-8497 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 5305-01-264-8497 was assigned to the Federal Catalog?

It was assigned 38 years ago, on Wed, Oct 7, 1987