5305-01-221-9771

Find complete technical information, availability, and procurement data for: 5305-01-221-9771
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-221-9771

Item Name Code

18257

Assigment Date

12/05/1985 (40 years ago)

A thin flat metal or plastic item of various peripheral shapes having a solid or laminated cross-section. It is designed to maintain a predetermined distance between two surfaces. For round items without a hole and having a solid rectangular cross-section use disk, solid, plain. Items with either (1) a solid (not laminated) cross-section, or (2) a non-separable laminated cross-section with one hole centrally located, must have a thickness less than 0.006 inch (0.152 mm) for items less than 1/4 inch (6.35 mm) outside diameter or shortest distance across peripheral flats, and less than 0.016 inch (0.406 mm) for items 1/4 inch (6.35 mm) or more outside diameter, or shortest distance across peripheral flats. For items with thickness greater than those indicated above, see spacer, plate; washer, flat and spacer, ring. When thickness and/or outside diameter or shortest distance across peripheral flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance. See also shim stock, laminated; shim stock assortment, gasket; and bearing, washer, thrust.

38.0 millimeters minimum and 41.0 millimeters maximum thread length, 2a thread class, hexagon extended washer head style, 41.00 millimeters nominal 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: 2a
Thread Direction: right-hand
Thread Length: 38.0 millimeters minimum and 41.0 millimeters maximum
Fastener Length: 41.00 millimeters nominal
Head Style: hexagon extended washer
Head Height: 13.0 millimeters nominal
Width Between Flats: 22.0 millimeters nominal
Extended Washer Diameter: 36.0 millimeters nominal
Extended Washer Thickness: 5.0 millimeters nominal
Hole Diameter: 2.00 millimeters nominal
Nominal Thread Diameter: 0.750 inches
Hole Quantity: 6
Hole Type: drilled
Thread Quantity Per Inch: 16
Hardness Rating: 32.0 rockwell c minimum and 36.0 rockwell c maximum overall
Hole Configuration Style: hexagon longitudinal hole
Material: steel comp 1013 or steel comp 1015 or steel comp 1016 or steel comp 1017 or steel comp 1018 or steel comp 1019 or steel comp 1020 or steel comp 1021 or steel comp 1022 or steel comp 1023 or steel comp 1524 or steel comp 1025 or steel comp 1026 or steel comp 1527 or steel comp 1029 or steel comp 1030 or steel comp 1033 or steel comp 1034 or steel comp 1035 or steel comp 1536 or steel comp 1037 or steel comp 1038 or steel comp 1039 or steel comp 1040 or steel comp 1541 overall
Material Document And Classification: sae grade 8 assn std single material response overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416,ty 2 cl 3 fed spec single treatment response overall
Thread Series Designator: m

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
1276-05-293	Hexagon Head Cap Screw
5305PL0816579	Hexagon Head Cap Screw
5520237	Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-01-221-9771?

The FSCG of the NSN 5305-01-221-9771 is 5305

Does the NSN 5305-01-221-9771 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-221-9771 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 5305-01-221-9771 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-221-9771 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 5305-01-221-9771 was assigned to the Federal Catalog?

It was assigned 40 years ago, on Thu, Dec 5, 1985