2868263-1

View detailed technical data, stock status, and sourcing information for: 2868263-1
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-180-3971

Item Name Code

22846

Assigment Date

05/29/1984 (42 years ago)

An item designed to fit over a packing gland by mating with a surface of a second part which together will retain into a narrow groove or confined space the packing, preformed or o-ring, or an item designed to fit over a rod or shaft, to mate with a stuffing box to confine packing material. It may function as a static or dynamic seal retainer with the packing located on, around, or in the centerline direction of the rod or shaft axis. It may have holes or joints for mounting, be threaded or unthreaded. See also packing nut and packing nut, stuffing tube.

3a thread class, right-hand thread direction, 0.923 inches minimum and 0.933 inches maximum fastener length, 0.418 inches minimum and 0.438 inches maximum thread length, flush 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: 0.418 inches minimum and 0.438 inches maximum
Fastener Length: 0.923 inches minimum and 0.933 inches maximum
Head Style: flush
Head Diameter: 0.419 inches minimum and 0.437 inches maximum
Head Height: 0.209 inches minimum and 0.219 inches maximum
Shoulder Diameter: 0.308 inches minimum and 0.310 inches maximum all shoulders
Shoulder Length: 0.445 inches minimum and 0.455 inches maximum all shoulders
Internal Drive Style: hexagon
Nominal Thread Diameter: 0.250 inches
Width Across Flats: 0.156 inches nominal
Thread Quantity Per Inch: 20
Minimum Tensile Strength: 160000 pounds per square inch
Hardness Rating: 32.0 rockwell c minimum and 43.0 rockwell c maximum overall
Shoulder Shape: round first shoulder
Material: steel comp 4037 or steel comp 8630 or steel comp 8740 overall
Material Document And Classification: 66 fed std single material response overall
Surface Treatment: cadmium and chromate overall
Surface Treatment Document And Classification: qq-p-416,ty2,cl3 fed spec single treatment response overall
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
2868263-1	Shoulder Screw

FAQs

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

What is the FSCG of the NSN 5305-01-180-3971?

The FSCG of the NSN 5305-01-180-3971 is 5305

Does the NSN 5305-01-180-3971 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-180-3971 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 5305-01-180-3971 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-180-3971 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 5305-01-180-3971 was assigned to the Federal Catalog?

It was assigned 42 years ago, on Tue, May 29, 1984