DPY 7900-4-B-2.

View detailed technical data, stock status, and sourcing information for: DPY 7900-4-B-2.
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-170-6204

Item Name Code

33044

Assigment Date

01/27/1984 (42 years ago)

A headed, threaded fastening device over which may be assembled; (1) a stand-off; (2) a flanged bushing with washer(s) and/or a shouldered bushing without a flange, or it may have an internally threaded sleeve that is an integral part of the screw; a washer and an externally thread self-locking bushing that is driven by an inserted driver. Attached to panel by threaded bushing or by flaring end of stand-off, or bushing. Used in conjunction with a speed nut, nut plate, or driven into a threaded hole in the item that the panel is fastened to. May be spring loaded.

right-hand thread direction, 0.472 inches minimum and 0.482 inches maximum fastener length, flat countersunk head style, 0.175 inches nominal thread length, 3a thread class

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: 0.175 inches nominal
Fastener Length: 0.472 inches minimum and 0.482 inches maximum
Head Style: flat countersunk
Head Diameter: 0.231 inches nominal
Material Accommodated Thickness: 0.090 inches minimum and 0.125 inches maximum
Nominal Thread Diameter: 0.112 inches
Thread Quantity Per Inch: 40
Hardness Rating: 34.0 rockwell c minimum and 38.0 rockwell c maximum fastener
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Material: copper alloy 360 stand-off
Material: steel comp 4037 fastener
Material Document And Classification: qq-b-626 fed spec single material response stand-off
Surface Treatment: cadmium fastener
Surface Treatment: cadmium stand-off
Surface Treatment Document And Classification: qq-p-416,type 1 cl 2 fed spec single treatment response fastener
Surface Treatment Document And Classification: qq-p-416,type 1 cl 2 fed spec single treatment response stand-off
Thread Series Designator: unc

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
952922-33	Panel Screw Assembly
DPY 7900-4-B-2.	Panel Screw Assembly
DPY 7900-4-B-2.5	Panel Screw Assembly
DPY7900-4-B-2.5	Panel Screw Assembly

FAQs

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

What is the FSCG of the NSN 5305-01-170-6204?

The FSCG of the NSN 5305-01-170-6204 is 5305

Does the NSN 5305-01-170-6204 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-170-6204 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 5305-01-170-6204 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-170-6204 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 5305-01-170-6204 was assigned to the Federal Catalog?

It was assigned 42 years ago, on Fri, Jan 27, 1984