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B1821BH031F056N

B1821BH031F056N

Machine Bolt

An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. The threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. For items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.

32.0 rockwell c minimum and 38.0 rockwell c maximum overall hardness rating, 0.531 inches minimum and 0.562 inches maximum fastener length, finished head features provided, 0.195 inches minimum and 0.211 inches maximum head height, multiple launch rocket system (mlrs) end item identification

NSN: 5306-00-051-4072
Federal Supply Group: Hardware and Abrasives
Federal Supply Classification: 5306 -Bolts
Item Identification Number: 00-051-4072
Requires Demilitarization?: Yes
INC: 01847
Assigment Date: Fri, Jan 1, 1960
End Item Identification: multiple launch rocket system (mlrs)
Fastener Length: 0.531 inches minimum and 0.562 inches maximum
Features Provided: finished head
Hardness Rating: 32.0 rockwell c minimum and 38.0 rockwell c maximum overall
Head Height: 0.195 inches minimum and 0.211 inches maximum
Head Style: hexagon
Material Document And Classification: sae gr 8 assn std single material response overall
Material: steel overall
Minimum Tensile Strength: 150000 pounds per square inch
Nominal Thread Diameter: 0.312 inches
Surface Treatment Document And Classification: astm b633 ty 2 sc 3 assn std single treatment response overall
Surface Treatment: zinc and chromate overall
Thread Class: 2a
Thread Direction: right-hand
Thread Length: 0.448 inches minimum
Thread Quantity Per Inch: 24
Thread Series Designator: unf
Width Between Flats: 0.489 inches minimum and 0.500 inches maximum

Related Parts

Part Number	Manufacturer
10392405	Nimikkeistokeskus Ncb Finland
B1821BH031F056N	American National Standards Institute Incorporated Dba American National Standards Institute

Frequently Asked Questions

What is the FSCG of the NSN 5306-00-051-4072?: The FSCG of the NSN 5306-00-051-4072 is 5306

Does NSN 5306-00-051-4072 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 5306-00-051-4072 contain precious materials?: Item does not contain precious metal.

Does NSN 5306-00-051-4072 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.