NAS1608-25

View detailed technical data, stock status, and sourcing information for: NAS1608-25
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-436-2402

Item Name Code

22846

Assigment Date

09/14/1996 (29 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.

0.781 inches maximum thread length, 2.329 inches minimum and 2.359 inches maximum fastener length, right-hand thread direction, 3a thread class, flat countersunk head style

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: 0.781 inches maximum
Fastener Length: 2.329 inches minimum and 2.359 inches maximum
Head Style: flat countersunk
Head Diameter: 0.951 inches minimum and 1.014 inches maximum
Shoulder Diameter: 0.5297 inches minimum and 0.5307 inches maximum first shoulder
Shoulder Length: 1.553 inches minimum and 1.573 inches maximum first shoulder
Internal Drive Style: high-torque
Nominal Thread Diameter: 0.500 inches
Thread Quantity Per Inch: 20
Minimum Tensile Strength: 160000 pounds per square inch
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Shoulder Shape: round first shoulder
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, type 2, class 2 fed spec all treatment responses overall
Thread Series Designator: unjf
Specification/Standard Data: 80205-nas1608 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
NAS1608-25	Shoulder Screw

FAQs

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

What is the FSCG of the NSN 5305-01-436-2402?

The FSCG of the NSN 5305-01-436-2402 is 5305

Does the NSN 5305-01-436-2402 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-436-2402 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 5305-01-436-2402 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-436-2402 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 5305-01-436-2402 was assigned to the Federal Catalog?

It was assigned 29 years ago, on Sat, Sep 14, 1996