5305-01-287-1588

Find complete technical information, availability, and procurement data for: 5305-01-287-1588
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-287-1588

Item Name Code

29294

Assigment Date

10/17/1988 (37 years ago)

A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)

0.500 inches nominal fastener length, pan head style, 3a thread class, right-hand thread direction, 0.338 inches nominal thread 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: 0.338 inches nominal
Fastener Length: 0.500 inches nominal
Head Style: pan
Head Diameter: 0.306 inches minimum and 0.322 inches maximum
Head Height: 0.105 inches minimum and 0.115 inches maximum
Grip Diameter: 0.1625 inches minimum and 0.1635 inches maximum
Internal Drive Style: cross recess type 1
Nominal Thread Diameter: 0.164 inches
Grip Length: 0.062 inches nominal
Thread Quantity Per Inch: 32
Special Features: two keyways along threads 180 degrees apart; width of keyways 0.040 in. min. to 0.050 in. max
Material: steel comp 302 or steel comp 304 or steel comp 304l or steel comp 305 or steel comp 309 or steel comp 310 or steel comp 316 or steel comp 316l or steel comp 317 or steel comp 321 or steel comp 322 or steel comp 324 or steel comp 347 overall
Material Document And Classification: qq-s-763 fed spec all material responses overall
Surface Treatment: passivate overall
Surface Treatment Document And Classification: qq-p-35 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
CA21062-08-2-8	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-287-1588?

The FSCG of the NSN 5305-01-287-1588 is 5305

Does the NSN 5305-01-287-1588 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-287-1588 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 5305-01-287-1588 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-287-1588 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 5305-01-287-1588 was assigned to the Federal Catalog?

It was assigned 37 years ago, on Mon, Oct 17, 1988