391B ✓ Verified by PartsTable

— · MRO · MRO_GENERAL

WHAT YOU NEED TO KNOW

Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel

Confirm exact part number — similar PNs may be different parts

PRODUCT OVERVIEW

The 391B is a the manufacturer industrial component. Key specifications include current_type: DC, terminal_type: SCREW, overall_length: 6.875 INCHES NOMINAL IN, voltage_rating: 12.0 VOLTS NOMINAL, mounting_method: HOLE, actuation_method: FLOAT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6625-01-409-1022, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS

MRO→ MRO_GENERAL→ 391B

NSN: 6625-01-409-1022
FSC: 6625
CAGE: 08098 — B&K PRECISION CORP DIV B&K PRECISION CORPORATION (USA)

SPECIFICATIONS

current_type	DC
terminal_type	SCREW
overall_length	6.875 INCHES NOMINAL IN
voltage_rating	12.0 VOLTS NOMINAL
mounting_method	HOLE
actuation_method	FLOAT
float_arm_length	5.188 INCHES NOMINAL IN
overall_diameter	2.594 INCHES NOMINAL IN
terminal_quantity	1
attachment_feature_quantity	5
electrical_connection_quantity	1
NSN	6625-01-409-1022

COMPONENT DIAGRAM

VERIFIED SUBSTITUTES & CROSS-REFERENCES 19

39013Upgraded Successor

successor cross-reference

successor

390AUpgraded Successor

successor cross-reference

successor

390A3Upgraded Successor

successor cross-reference

successor

111417-16D-0540Interchangeable

interchangeable cross-reference

interchangeable

MIL-DTL-8795Interchangeable

interchangeable cross-reference

interchangeable

MS28741-16-0540Interchangeable

interchangeable cross-reference

interchangeable

LIFECYCLE

StatusACTIVE

AvailabilityOEM and secondary market

RoHS CompliantEAR99ESD SensitiveNot HAZMAT

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FREQUENTLY ASKED QUESTIONS

What is 391B?

391B is a 391B. It is classified as a MRO (MRO_GENERAL).

What parts can replace 391B?

There are 19 known substitutes for 391B: 39013, 390A, 390A3 and 16 more. Substitute compatibility should be verified for your specific system.

What is the NSN for 391B?

391B is cataloged in the Federal Logistics Information System (FLIS) under NSN 6625-01-409-1022. This indicates validated use in U.S. government and defense supply chains.

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