MB251-4D11

View detailed technical data, stock status, and sourcing information for: MB251-4D11
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-01-188-6843

Item Name Code

27851

Assigment Date

09/07/1984 (41 years ago)

A terminal designed to be affixed, usually at one end, to a post, stud, chassis, or the like for mounting. It has provisions for attachment of wire(s) or similar electrical conductor(s) in order to establish an electrical connection and could require the use of tool(s) for attachment of wire. For post like terminals, see terminal stud. Excludes:clip, electrical; terminal, quick disconnect and terminal feedthru.

right-hand thread direction, 3a thread class, 0.400 inches minimum and 0.450 inches maximum thread length, hexagon head style, 1.098 inches minimum and 1.128 inches maximum fastener 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: 3a
Thread Direction: right-hand
Thread Length: 0.400 inches minimum and 0.450 inches maximum
Fastener Length: 1.098 inches minimum and 1.128 inches maximum
Head Style: hexagon
Head Height: 0.125 inches minimum and 0.140 inches maximum
Width Between Flats: 0.430 inches minimum and 0.439 inches maximum
Grip Diameter: 0.2485 inches minimum and 0.2495 inches maximum
Shank Unthreaded Hole Diameter: 0.076 inches minimum and 0.086 inches maximum first hole
Nominal Thread Diameter: 0.250 inches
Grip Length: 0.678 inches minimum and 0.698 inches maximum
Features Provided: finished head
Thread Quantity Per Inch: 28
Distance From Head Largest Bearing Surface To Shank Hole Center: 0.907 inches minimum and 0.957 inches maximum first hole
Surface Finish: 16.0 microinches threads
Surface Finish: 63.0 microinches bearing surface of head
Surface Finish: 63.0 microinches grip
Material: titanium alloy overall
Material Document And Classification: ams4697,comp 6al-4v assn std single material response overall
Surface Treatment: aluminum overall
Surface Treatment Document And Classification: mil-c-83488,ty 2,cl 3 mil spec single treatment response overall
Thread Series Designator: unjf

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
801651-4D11	Close Tolerance Bolt
MB251-4D11	Close Tolerance Bolt
PBF1264-4D11	Close Tolerance Bolt
SC2663-4-11D	Close Tolerance Bolt
ST3M731-4D11	Close Tolerance Bolt
VS3207-4-11D	Close Tolerance Bolt

FAQs

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

What is the FSCG of the NSN 5306-01-188-6843?

The FSCG of the NSN 5306-01-188-6843 is 5306

Does the NSN 5306-01-188-6843 have a Schedule B code assigned?

Yes, the Schedule B code is 8109900000

Does NSN 5306-01-188-6843 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 5306-01-188-6843 contain precious materials?

Item does not contain precious metal.

Does NSN 5306-01-188-6843 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 5306-01-188-6843 was assigned to the Federal Catalog?

It was assigned 41 years ago, on Fri, Sep 7, 1984