5305-01-287-1920

Find complete technical information, availability, and procurement data for: 5305-01-287-1920
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-287-1920

Item Name Code

29294

Assigment Date

10/18/1988 (37 years ago)

An insulator designed to fit into and reduce the effective diameter of the hole(s). It may include mounting and/or conducting hardware. For flexible bushing-type insulators that are self-retaining and consist of two facing flanges separated by a neck, see grommet, nonmetallic. Also see spacer, sleeve and bushing, sleeve. Excludes:insulation sleeving, electrical.

0.491 inches minimum and 0.511 inches maximum thread length, right-hand thread direction, flat countersunk head style, 3a thread class, 1.043 inches minimum and 1.073 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: 0.491 inches minimum and 0.511 inches maximum
Fastener Length: 1.043 inches minimum and 1.073 inches maximum
Head Style: flat countersunk
Head Diameter: 0.447 inches minimum and 0.507 inches maximum
Grip Diameter: 0.2485 inches minimum and 0.2495 inches maximum
Internal Drive Style: offset cruciform (torque set)
Nominal Thread Diameter: 0.250 inches
Grip Length: 0.678 inches minimum and 0.698 inches maximum
Thread Quantity Per Inch: 28
Minimum Tensile Strength: 220000 pounds per square inch
Hardness Rating: 46.0 rockwell c minimum and 49.0 rockwell c maximum overall
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Material: steel comp h11 overall
Material Document And Classification: ams6487 assn std single material response overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416,type 2,class 2 fed spec single treatment response overall
Thread Series Designator: unjf

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
121557L4-A11	Close Tolerance Screw
5305PL0784858	Close Tolerance Screw
AIC984-L4-11	Close Tolerance Screw
AIC984BL4-11	Close Tolerance Screw
C7984L4-11	Close Tolerance Screw
PBF1165L4-11	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-287-1920?

The FSCG of the NSN 5305-01-287-1920 is 5305

Does the NSN 5305-01-287-1920 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-287-1920 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 5305-01-287-1920 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-287-1920 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 5305-01-287-1920 was assigned to the Federal Catalog?

It was assigned 37 years ago, on Tue, Oct 18, 1988