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5305-00-018-1581

Find complete technical information, availability, and procurement data for: 5305-00-018-1581

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5305-00-018-1581
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5305 Screws
National Stock Number
5305-00-018-1581
Item Name Code
18257
Assigment Date
01/01/1963 (63 years ago)

An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. The threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. The thread length being the controlled dimension, the grip length is not specified. A locking feature may be incorporated in the design of the head or threads. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. Excludes:bolt,machine; bolt,externally relieved body; bolt,internal wrenching; and screw,cap,socket head.

0.750 inches minimum thread length, hexagon head style, right-hand thread direction, 2a thread class, 2.500 inches nominal fastener 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
2a
Thread Direction
right-hand
Thread Length
0.750 inches minimum
Fastener Length
2.500 inches nominal
Head Style
hexagon
Head Height
0.150 inches minimum and 0.163 inches maximum
Width Between Flats
0.428 inches minimum and 0.438 inches maximum
Nominal Thread Diameter
0.250 inches
Thread Quantity Per Inch
28
Minimum Tensile Strength
120000 pounds per square inch
Hardness Rating
23.0 rockwell c minimum and 30.0 rockwell c maximum overall
Material
steel overall
Surface Treatment
cadmium and chromate or zinc and chromate overall
Thread Series Designator
unf
Nondefinitive Spec/Std Data
2 type and 10p style and 5 grade

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN Name Date
5305-00-802-1300 No Name Available 01/01/1962

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
MS35298-16 Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-00-018-1581?
The FSCG of the NSN 5305-00-018-1581 is 5305
Does the NSN 5305-00-018-1581 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-00-018-1581 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 5305-00-018-1581 contain precious materials?
Precious metal content is unknown
Does NSN 5305-00-018-1581 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 5305-00-018-1581 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Tue, Jan 1, 1963

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