5305-01-273-4525

Find complete technical information, availability, and procurement data for: 5305-01-273-4525
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5305 Screws

National Stock Number

5305-01-273-4525

Item Name Code

29294

Assigment Date

02/25/1988 (38 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.)

0.553 inches minimum and 0.603 inches maximum thread length, 0.813 inches minimum and 0.843 inches maximum fastener length, flat countersunk head style, right-hand thread direction, 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: 0.553 inches minimum and 0.603 inches maximum
Fastener Length: 0.813 inches minimum and 0.843 inches maximum
Head Style: flat countersunk
Head Diameter: 0.513 inches minimum and 0.566 inches maximum
Grip Diameter: 0.3735 inches minimum and 0.3745 inches maximum
Internal Drive Style: torque-set ribbed
Nominal Thread Diameter: 0.375 inches
Grip Length: 0.240 inches minimum and 0.260 inches maximum
Thread Quantity Per Inch: 24
Minimum Tensile Strength: 108000 pounds per square inch
Hardness Rating: 39.0 rockwell c minimum and 43.0 rockwell c maximum overall
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum
Surface Finish: 32.0 microinches bearing surface of head
Surface Finish: 32.0 microinches grip
Surface Finish: 32.0 microinches threads
Material: steel comp 4140 or steel comp e4340 or steel comp 8740 overall
Material Document And Classification: mil-s-5626 mil spec 1st material response or mil-s-5000 mil spec 2nd material response or mil-s-6049 mil spec 3rd 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
Specification/Standard Data: 80205-nas1996 professional/industrial association standard

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
NAS1996-4T	Close Tolerance Screw

FAQs

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

What is the FSCG of the NSN 5305-01-273-4525?

The FSCG of the NSN 5305-01-273-4525 is 5305

Does the NSN 5305-01-273-4525 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5305-01-273-4525 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 5305-01-273-4525 contain precious materials?

Item does not contain precious metal.

Does NSN 5305-01-273-4525 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 5305-01-273-4525 was assigned to the Federal Catalog?

It was assigned 38 years ago, on Thu, Feb 25, 1988