MB89-4-20

View detailed technical data, stock status, and sourcing information for: MB89-4-20
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5306 Bolts

National Stock Number

5306-01-045-4198

Item Name Code

04905

Assigment Date

08/01/1977 (49 years ago)

An externally threaded fastener whose threaded portion is of one nominal diameter, no. 10 (0.190 in.) (5 mm) or larger. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is not designed to be held or driven with an inserted drivers. A locking feature may be incorporated in the design of the head or threads. For items with a thread diameter smaller than no. 10 (0.190 in.) (5 mm) and those items with an inserted drive head, use screw, shoulder. For items which are no. 10 (0.190 in.) (5 mm) or larger in size and are both shouldered and have an externally relieved body, use bolt, externally relieved body. Excludes:thumbscrew.

right-hand thread direction, 0.371 inches minimum and 0.438 inches maximum thread length, double hexagon head style, 3a thread class, 1.631 inches minimum and 1.678 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: 0.371 inches minimum and 0.438 inches maximum
Fastener Length: 1.631 inches minimum and 1.678 inches maximum
Head Style: double hexagon
Head Height: 0.154 inches minimum and 0.174 inches maximum
Width Between Flats: 0.430 inches minimum and 0.439 inches maximum
Shoulder Diameter: 0.2802 inches minimum and 0.2807 inches maximum first shoulder
Shoulder Length: 1.240 inches minimum and 1.260 inches maximum first shoulder
Nominal Thread Diameter: 0.250 inches
Thread Quantity Per Inch: 28
Shoulder Shape: round first shoulder
Material: steel overall
Thread Series Designator: unjf
Specification/Standard Data: 76301-st3-507 professional/industrial association standard

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
109451-4-20	Shoulder Bolt
109453-4-20Y	Shoulder Bolt
BM17019-4-20Y	Shoulder Bolt
HP5507-4-20	Shoulder Bolt
MA5507-4-20	Shoulder Bolt
MB89-4-20	Shoulder Bolt
PBF1366-4-20	Shoulder Bolt
S11-1062-4-20	Shoulder Bolt
ST3M507-4-20	Shoulder Bolt
VAL23608-4-20	Shoulder Bolt
VS3038-4-20	Shoulder Bolt

FAQs

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

What is the FSCG of the NSN 5306-01-045-4198?

The FSCG of the NSN 5306-01-045-4198 is 5306

Does the NSN 5306-01-045-4198 have a Schedule B code assigned?

Yes, the Schedule B code is 7318152000

Does NSN 5306-01-045-4198 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 5306-01-045-4198 contain precious materials?

Precious metal content is unknown

Does NSN 5306-01-045-4198 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 5306-01-045-4198 was assigned to the Federal Catalog?

It was assigned 49 years ago, on Mon, Aug 1, 1977