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B1821BH050C400N

View detailed technical data, stock status, and sourcing information for: B1821BH050C400N

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B1821BH050C400N
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5305 Screws
National Stock Number
5305-00-071-2079
Item Name Code
18257
Assigment Date
01/01/1960 (66 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.

right-hand thread direction, 3.906 inches minimum and 4.000 inches maximum fastener length, hexagon head style, 2a thread class, 1.250 inches minimum and 1.442 inches maximum thread 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
1.250 inches minimum and 1.442 inches maximum
Fastener Length
3.906 inches minimum and 4.000 inches maximum
Head Style
hexagon
Head Height
0.302 inches minimum and 0.323 inches maximum
Width Between Flats
0.736 inches minimum and 0.750 inches maximum
Nominal Thread Diameter
0.500 inches
Thread Quantity Per Inch
13
Minimum Tensile Strength
150000 pounds per square inch
Surface Finish
63.0 microinches threads
Material
steel overall
Material Document And Classification
saej429 grade 8 assn std single material response or astma354 grade bd assn std single material response overall
Surface Treatment
zinc and chromate overall
Surface Treatment Document And Classification
astm b633 ty 2 sc 3 assn std single treatment response overall
Thread Series Designator
unc

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN Name Date
5305-00-021-3841 No Name Available 10/21/1998
5305-00-282-0474 No Name Available 01/01/1983
5305-00-365-0050 No Name Available 09/01/1984
5305-00-591-3380 No Name Available 04/01/1979
5305-00-637-4611 No Name Available 02/01/1998

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
003-2-2953 Hexagon Head Cap Screw
021-12330 Hexagon Head Cap Screw
0768-1029 Hexagon Head Cap Screw
1/2-UNC X 4,C/S ZINC PLATED Hexagon Head Cap Screw
24KP981 Hexagon Head Cap Screw
5305000712079 Hexagon Head Cap Screw
5305PL0780953 Hexagon Head Cap Screw
65901AX Hexagon Head Cap Screw
B1821BH050C400N Hexagon Head Cap Screw
MS90728-123 Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-00-071-2079?
The FSCG of the NSN 5305-00-071-2079 is 5305
Does the NSN 5305-00-071-2079 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-00-071-2079 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 5305-00-071-2079 contain precious materials?
Item does not contain precious metal.
Does NSN 5305-00-071-2079 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 5305-00-071-2079 was assigned to the Federal Catalog?
It was assigned 66 years ago, on Fri, Jan 1, 1960

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