B290 — CIRCUIT BREAKER

✓ Government record, cited

— · MRO · MRO_GENERAL

PRODUCT OVERVIEW

B290: CIRCUIT BREAKER.

The CIRCUIT BREAKER is a the manufacturer industrial component. Key specifications include diameter: 0.500 INCHES NOMINAL IN, material: PLASTIC CASE, body_style: RECTANGULAR DIMENSIONAL ENVELOPE, reset_method: MANUAL, overall_width: 3.000 INCHES NOMINAL IN, overall_height: 2.375 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-020-6784, 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→ B290

NSN: 5315-01-020-6784
NIINs: 010206784, 013876609, 014354227
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 1NH57 — ARCOSA MARINE COMPONENTS, LLC (USA)

SPECIFICATIONS

diameter	0.500 INCHES NOMINAL IN
material	PLASTIC CASE
body_style	RECTANGULAR DIMENSIONAL ENVELOPE
reset_method	MANUAL
overall_width	3.000 INCHES NOMINAL IN
pole_quantity	2
overall_height	2.375 INCHES NOMINAL IN
overall_length	3.562 INCHES NOMINAL IN
undercut_width	0.250 INCHES NOMINAL IN
first_end_style	CHAMFERED
hardness_rating	52.0 ROCKWELL C MINIMUM AND 56.0 ROCKWELL C MAXIMUM OVERALL
undercut_radius	0.250 INCHES NOMINAL IN
NSN	5315-01-020-6784

COMPONENT DIAGRAM

KEY FEATURES

•

UNDERCUT WIDTH: 0.250 INCHES NOMINAL IN

•

FIRST END TAPER LENGTH: 0.062 INCHES NOMINAL IN

•

UNDERCUT DIAMETER: 0.375 INCHES NOMINAL IN

•

FIRST END LOCATION: BOTH ENDS

•

HOLE ARRANGEMENT STYLE: ONE END DRILLED

•

FIRST END STYLE: CHAMFERED

•

FIRST HOLE DIAMETER: 0.141 INCHES NOMINAL IN

•

HARDNESS RATING: 52.0 ROCKWELL C MINIMUM AND 56.0 ROCKWELL C MAXIMUM OVERALL

TECHNICAL CHARACTERISTICS

UNDERCUT WIDTH	0.250 INCHES NOMINAL IN
FIRST END TAPER LENGTH	0.062 INCHES NOMINAL IN
UNDERCUT DIAMETER	0.375 INCHES NOMINAL IN
FIRST END LOCATION	BOTH ENDS
HOLE ARRANGEMENT STYLE	ONE END DRILLED
FIRST END STYLE	CHAMFERED
FIRST HOLE DIAMETER	0.141 INCHES NOMINAL IN
HARDNESS RATING	52.0 ROCKWELL C MINIMUM AND 56.0 ROCKWELL C MAXIMUM OVERALL
STYLE DESIGNATOR	GROOVE
DIAMETER	0.500 INCHES NOMINAL IN

SUBSTITUTES & CROSS-REFERENCES 4

290Reference document

Same NSN cross-reference

Reference document — Secondary reference

L12M-RFAReference document

Same NSN cross-reference

Reference document — Secondary reference

L12MReference document

Same NSN cross-reference

Reference document — Secondary reference

290-BReference document

Same NSN cross-reference

Reference document — Design control — primary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is B290?

B290 is a CIRCUIT BREAKER. It is classified as a MRO (MRO_GENERAL).

What parts can replace B290?

There are 4 known substitutes for B290: 290, L12M-RFA, L12M and 1 more. Substitute compatibility should be verified for your specific system.

What is the NSN for B290?

B290 is cataloged in the U.S. Government catalog under NSN 5315-01-020-6784. This indicates validated use in U.S. government and defense supply chains.

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