5306-01-261-1603

Find complete technical information, availability, and procurement data for: 5306-01-261-1603
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-01-261-1603

Item Name Code

15903

Assigment Date

08/09/1987 (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.

1.525 inches minimum and 1.555 inches maximum fastener length, double hexagon extended washer head style, 3a thread class, 0.640 inches minimum and 0.690 inches maximum thread 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: 0.640 inches minimum and 0.690 inches maximum
Fastener Length: 1.525 inches minimum and 1.555 inches maximum
Head Style: double hexagon extended washer
Head Height: 0.425 inches minimum and 0.445 inches maximum
Width Between Flats: 0.492 inches minimum and 0.502 inches maximum
Extended Washer Diameter: 0.740 inches minimum and 0.750 inches maximum
Extended Washer Thickness: 0.089 inches minimum and 0.109 inches maximum
Grip Diameter: 0.436 inches minimum and 0.437 inches maximum
Shank Unthreaded Hole Diameter: 0.101 inches minimum and 0.111 inches maximum first hole
Nominal Thread Diameter: 0.437 inches
Grip Length: 0.865 inches minimum and 0.885 inches maximum
Thread Quantity Per Inch: 20
Minimum Tensile Strength: 220000 pounds per square inch
Hardness Rating: 46.0 rockwell c minimum and 50.0 rockwell c maximum overall
Distance From Head Largest Bearing Surface To Shank Hole Center: 1.314 inches minimum and 1.364 inches maximum first hole
Surface Finish: 32.0 microinches bearing surface of head
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Part Name Assigned By Controlling Agency: navy special project
Material: steel comp h11 overall
Material Document And Classification: ams 6487 assn std single material response overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416 ty 2 fed spec single treatment response overall
Thread Series Designator: unjf

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FAQs

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

What is the FSCG of the NSN 5306-01-261-1603?

The FSCG of the NSN 5306-01-261-1603 is 5306

Does the NSN 5306-01-261-1603 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-01-261-1603 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 5306-01-261-1603 contain precious materials?

Item does not contain precious metal.

Does NSN 5306-01-261-1603 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 5306-01-261-1603 was assigned to the Federal Catalog?

It was assigned 38 years ago, on Sun, Aug 9, 1987