MB61-7-26

View detailed technical data, stock status, and sourcing information for: MB61-7-26
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-01-623-4934

Item Name Code

27851

Assigment Date

11/15/2013 (12 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.

3a thread class, double hexagon head style, right-hand thread direction, 2.208 inches minimum and 2.225 inches maximum fastener length, 0.599 inches nominal 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: 3a
Thread Direction: right-hand
Thread Length: 0.599 inches nominal
Fastener Length: 2.208 inches minimum and 2.225 inches maximum
Head Style: double hexagon
Head Height: 0.247 inches minimum and 0.267 inches maximum
Width Between Flats: 0.690 inches maximum
Grip Diameter: 0.4270 inches minimum and 0.4385 inches maximum
End Item Identification: a-10 wrp
Nominal Thread Diameter: 0.4375 inches
Grip Length: 1.625 inches nominal
Thread Quantity Per Inch: 20
Minimum Tensile Strength: 125000 pounds per square inch
Material: steel comp xm-13 overall
Surface Treatment: passivate overall
Surface Treatment Document And Classification: qq-p-35 fed 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
MB61-7-26	Close Tolerance Bolt
ST3M453-7-26	Close Tolerance Bolt

FAQs

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

What is the FSCG of the NSN 5306-01-623-4934?

The FSCG of the NSN 5306-01-623-4934 is 5306

Does the NSN 5306-01-623-4934 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-01-623-4934 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 5306-01-623-4934 contain precious materials?

Item does not contain precious metal.

Does NSN 5306-01-623-4934 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 5306-01-623-4934 was assigned to the Federal Catalog?

It was assigned 12 years ago, on Fri, Nov 15, 2013