Cummins BM56391 Connecting Rod, Piston

Cummins BM56391 is a connecting rod in Engine Parts, US catalog. Listed by US Government (DLA FLIS), October 2026.

Government data (US Government (DLA FLIS), October 2026 edition)

The U.S. government's Federal Logistics Information System (FLIS) records Cummins BM56391 as the maker's own number under government stock item NSN 2815-00-787-6508. The name and every fact below are FLIS's, credited to US Government (DLA FLIS), October 2026 edition.

Specifications recorded for government stock item NSN 2815-00-787-6508, under which this manufacturer's reference number is listed. Confirm compatibility and specifications with the manufacturer before ordering.

Government item name

Connecting Rod, Piston

Government stock item (NSN)

2815-00-787-6508

Manufacturer code (CAGE)

15434, CUMMINS INC., COLUMBUS, IN, UNITED STATES

Fabrication method

Forged

End thickness

2.250 in (nominal)

Edge radius

2.000 in (nominal)

End hole inside diameter

1.312 in (nominal)

Piston connecting end bearing

Included

Bearing replaceability

Replaceable

Piston connecting end lubrication drill feature

Included

Piston connecting end lubrication method

Full forced feed

Shaft connecting end bearing

Not included

Shaft connecting end hole inside diameter

4.000 in (nominal)

Shaft connecting end edge radius

2.375 in (nominal)

Shaft connecting end width

5.500 in (nominal)

Shaft connecting end thickness

1.844 in (nominal)

Shaft connecting end bearing replaceability

Replaceable

Shaft connecting end lubrication drill feature

Included

Shaft connecting end lubrication method

Full forced feed

Center to center effective length

12.000 in (nominal)

Body width at piston connecting end

1.625 in (nominal)

Body width at shaft connecting end

2.125 in (nominal)

Body thickness at piston connecting end

1.250 in (nominal)

Body thickness at shaft connecting end

1.312 in (nominal)

Material

Steel

Source: US Government (DLA FLIS), October 2026 edition, a public U.S. government data release. This is not an official DLA record and may contain errors. Verify fitment before ordering. Not affiliated with or endorsed by the Defense Logistics Agency or the Department of Defense. SearchForPart does not show a price here.

About this kind of part (general, written by SearchForPart)

Connects the piston to the crankshaft. Replaced after a bearing failure, bending or damage. Check the engine model and the rod's bearing size.

When ordering, give the part number exactly as printed and its maker, and the make, model and year of the truck, trailer, reefer unit or machine (or the engine or unit serial number). SearchForPart shows fitment only as the source printed it: check it before you order.

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Source: US Government (DLA FLIS), October 2026 edition, a public U.S. government data release. This is not an official DLA record and may contain errors. Verify fitment before ordering. Not affiliated with or endorsed by the Defense Logistics Agency or the Department of Defense. SearchForPart does not show a price here.