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B1821BH050125N

View detailed technical data, stock status, and sourcing information for: B1821BH050125N

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B1821BH050125N
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5305 Screws
National Stock Number
5305-00-071-2067
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, hexagon head style, 1.250 inches maximum thread length, 1.250 inches nominal fastener length, 2a thread class

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 maximum
Fastener Length
1.250 inches nominal
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
End Item Identification
contact maintenance truck,b-1 support equipment,aircraft refueler vehicle,boilers,compressors,firepumps,stream,shipboard material handling eq,mk-48 torpedo;rg-33 armored utility vehicle (auv);rg-33 mrap; medium mine protected vehicle - mmpv; multiple launch rocket system (mlrs); a4 bradley fighting vehicle; a3 bradley fighting vehicle; logistics support vessel; high-mobility artillery rocket system (himars)
Nominal Thread Diameter
0.500 inches
Thread Quantity Per Inch
13
Minimum Tensile Strength
150000 pounds per square inch
Hardness Rating
33.0 rockwell c minimum and 39.0 rockwell c maximum overall
Minimum Yield Strength
130000 pounds per square inch
Material
steel overall
Material Document And Classification
sae j429,grade 8 assn std single material response or astm a354,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
5305-00-018-6731 No Name Available 09/01/1979
5305-01-407-5382 No Name Available 01/01/2007
5305-01-431-8239 No Name Available 08/01/2006

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
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17C820 Hexagon Head Cap Screw
18257-025 Hexagon Head Cap Screw
19H2898 Hexagon Head Cap Screw
306-40080 Hexagon Head Cap Screw
3176210-A-174 Hexagon Head Cap Screw
5305000712067 Hexagon Head Cap Screw
5305PL0772221 Hexagon Head Cap Screw
6057254 Hexagon Head Cap Screw
71145-111 Hexagon Head Cap Screw
903876 Hexagon Head Cap Screw
920491 Hexagon Head Cap Screw
AES01C500A25AW9A91 Hexagon Head Cap Screw
B1821BH050125N Hexagon Head Cap Screw
B1821BH050C125N Hexagon Head Cap Screw
B1821BH05C125N Hexagon Head Cap Screw
F100A050010 ITEM 1 Hexagon Head Cap Screw
F100A50010 Hexagon Head Cap Screw
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M19-20873 PC NO 122 Hexagon Head Cap Screw
MS90728-111 Hexagon Head Cap Screw
S3S14526000-431 Hexagon Head Cap Screw
SPE306-N20 Hexagon Head Cap Screw

FAQs

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

What is the FSCG of the NSN 5305-00-071-2067?
The FSCG of the NSN 5305-00-071-2067 is 5305
Does the NSN 5305-00-071-2067 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-00-071-2067 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 5305-00-071-2067 contain precious materials?
Item does not contain precious metal.
Does NSN 5305-00-071-2067 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 5305-00-071-2067 was assigned to the Federal Catalog?
It was assigned 66 years ago, on Fri, Jan 1, 1960

Professional Distribution

Certified to meet the strict requirements of defense, aerospace, and hazardous materials distribution.

  • ITAR Registered
  • DDTC Registered
  • HAZMAT Certified
  • AS9120 Quality Standards
  • 100% Quality Inspections

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