213918

View detailed technical data, stock status, and sourcing information for: 213918

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213918
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5305 Screws
National Stock Number
5305-00-021-3918
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.

0.500 inches nominal fastener length, 0.500 inches maximum thread length, hexagon head style, 2a thread class, right-hand thread direction

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
0.500 inches maximum
Fastener Length
0.500 inches nominal
Head Style
hexagon
Head Height
0.226 inches minimum and 0.243 inches maximum
Width Between Flats
0.551 inches minimum and 0.562 inches maximum
Nominal Thread Diameter
0.375 inches
Thread Quantity Per Inch
24
Minimum Tensile Strength
80000 pounds per square inch
Material
steel comp 302 or steel comp 303 or steel comp 304 or steel comp 305 or steel comp 316 overall
Material Document And Classification
66 fed std 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
unf

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN Name Date
5305-00-946-8287 No Name Available 01/10/2012

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
213918 Hexagon Head Cap Screw
MS35308-355 Hexagon Head Cap Screw
W95A37 Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-00-021-3918?
The FSCG of the NSN 5305-00-021-3918 is 5305
Does the NSN 5305-00-021-3918 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-00-021-3918 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 5305-00-021-3918 contain precious materials?
Item does not contain precious metal.
Does NSN 5305-00-021-3918 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 5305-00-021-3918 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Tue, Jan 1, 1963

Professional Distribution

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