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5305-00-266-4125

Find complete technical information, availability, and procurement data for: 5305-00-266-4125

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5305-00-266-4125
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5305 Screws
National Stock Number
5305-00-266-4125
Item Name Code
18257
Assigment Date
01/01/1961 (65 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.)

1.500 inches minimum thread length, right-hand thread direction, hexagon head style, 2.000 inches nominal fastener length, 2a 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
2a
Thread Direction
right-hand
Thread Length
1.500 inches minimum
Fastener Length
2.000 inches nominal
Head Style
hexagon
Head Height
0.469 inches nominal
Width Between Flats
0.938 inches nominal
Nominal Thread Diameter
0.625 inches
Thread Quantity Per Inch
11
Minimum Tensile Strength
151000 pounds per square inch
Hardness Rating
32.0 rockwell c minimum and 38.0 rockwell c maximum overall
Material
steel 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
1A-1135 Hexagon Head Cap Screw
1A1135 Hexagon Head Cap Screw
4CA962 Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-00-266-4125?
The FSCG of the NSN 5305-00-266-4125 is 5305
Does the NSN 5305-00-266-4125 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-00-266-4125 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 5305-00-266-4125 contain precious materials?
Precious metal content is unknown
Does NSN 5305-00-266-4125 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 5305-00-266-4125 was assigned to the Federal Catalog?
It was assigned 65 years ago, on Sun, Jan 1, 1961

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