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B1821BH025C056N

B1821BH025C056N

Hexagon Head Cap Screw

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.

sae j429 grade 8 assn std single material response or astm a354 grade bd assn std single material response overall material document and classification, 0.531 inches minimum and 0.562 inches maximum fastener length, 0.150 inches minimum and 0.163 inches maximum head height, mrap rg 33; a4 bradley fighting vehicle; a3 bradley fighting vehicle end item identification, hexagon head style

NSN: 5305-00-225-3844
Federal Supply Group: Hardware and Abrasives
Federal Supply Classification: 5305 -Screws
Item Identification Number: 00-225-3844
Requires Demilitarization?: Yes
INC: 18257
Assigment Date: Tue, Jan 1, 1963
Schedule B Code: 8710000090
End Item Identification: mrap rg 33; a4 bradley fighting vehicle; a3 bradley fighting vehicle
Fastener Length: 0.531 inches minimum and 0.562 inches maximum
Head Height: 0.150 inches minimum and 0.163 inches maximum
Head Style: hexagon
Material Document And Classification: sae j429 grade 8 assn std single material response or astm a354 grade bd assn std single material response overall
Material: steel overall
Minimum Tensile Strength: 150000 pounds per square inch
Nominal Thread Diameter: 0.250 inches
Surface Finish: 63.0 microinches threads
Surface Treatment Document And Classification: astm b633 ty 2 sc 3 assn std single treatment response overall
Surface Treatment
Thread Class: 2a
Thread Direction: right-hand
Thread Length: 0.406 inches minimum and 0.562 inches maximum
Thread Quantity Per Inch: 20
Thread Series Designator: unified national coarse (unc)
Width Between Flats: 0.428 inches minimum and 0.438 inches maximum

Related Parts

Part Number	Manufacturer
5305002253844	E.c.a Etablissement Central des Approvisionnements des Forces Armees Royales
AES01C250562AW9A91	The American Society of Mechanical Engineers
B1821BH025C056N	American National Standards Institute Incorporated Dba American National Standards Institute
G1921BH025C056N	General Dynamics Land Systems Inc.

Frequently Asked Questions

What is the FSCG of the NSN 5305-00-225-3844?: The FSCG of the NSN 5305-00-225-3844 is 5305

Does the NSN 5305-00-225-3844 have a Schedule B code assigned?: Yes, the Schedule B code is 8710000090

Does NSN 5305-00-225-3844 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 5305-00-225-3844 contain precious materials?: Precious metal content is unknown

Does NSN 5305-00-225-3844 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.