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5305000181657

View detailed technical data, stock status, and sourcing information for: 5305000181657

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5305000181657
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5305 Screws
National Stock Number
5305-00-018-1657
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.

hexagon head style, 2a thread class, 0.688 inches maximum thread length, 0.656 inches minimum and 0.688 inches maximum fastener length, 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
0.688 inches maximum
Fastener Length
0.656 inches minimum and 0.688 inches maximum
Head Style
hexagon
Head Height
0.272 inches minimum and 0.291 inches maximum
Width Between Flats
0.612 inches minimum and 0.625 inches maximum
Nominal Thread Diameter
0.438 inches
Thread Quantity Per Inch
20
Minimum Tensile Strength
120000 pounds per square inch
Hardness Rating
23.0 rockwell c minimum and 32.0 rockwell c maximum overall
Minimum Yield Strength
85000 pounds per square inch
Material
steel overall
Material Document And Classification
sae gr 5 assn std single material response overall
Surface Treatment
cadmium or zinc overall
Surface Treatment Document And Classification
qq-p-416,ty 2,cl 3 fed spec 1st treatment response or qq-z-325,ty 2,cl 3 fed spec 2nd treatment response overall
Thread Series Designator
unf
Nondefinitive Spec/Std Data
2 type and 10 style
Departure From Cited Designator
as modified by fastener length

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
181657 Hexagon Head Cap Screw
5305000181657 Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-00-018-1657?
The FSCG of the NSN 5305-00-018-1657 is 5305
Does the NSN 5305-00-018-1657 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-00-018-1657 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 5305-00-018-1657 contain precious materials?
Precious metal content is unknown
Does NSN 5305-00-018-1657 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 5305-00-018-1657 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Tue, Jan 1, 1963

Professional Distribution

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