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187873 — CIRCUIT BREAKER

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

187873: CIRCUIT BREAKER.

The CIRCUIT BREAKER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, head_height: 0.092 INCHES MINIMUM AND 0.094 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.422 INCHES MINIMUM AND 0.454 INCHES MAXIMUM IN, thread_length: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN, shoulder_shape: ROUND FIRST SHOULDER. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-207-4948, 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→ 187873
NSN: 5305-00-207-4948
NIINs: 002074948, 013219328
FSC: 5305 — Screws
CAGE: 56232 — LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
head_height0.092 INCHES MINIMUM AND 0.094 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.422 INCHES MINIMUM AND 0.454 INCHES MAXIMUM IN
thread_length0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.548 INCHES MINIMUM AND 0.578 INCHES MAXIMUM IN
shoulder_length0.062 INCHES MINIMUM AND 0.064 INCHES MAXIMUM FIRST SHOULDER IN
thread_directionRIGHT-HAND
shoulder_diameter0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM FIRST SHOULDER IN
internal_drive_styleSLOT
end_item_identificationAIRPORT SURVEILLANCE DETECTION EQUIPMENT 3,ASDE3
NSN5305-00-207-4948
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 187873 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
HEAD HEIGHT: 0.092 INCHES MINIMUM AND 0.094 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.548 INCHES MINIMUM AND 0.578 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 0.062 INCHES MINIMUM AND 0.064 INCHES MAXIMUM FIRST SHOULDER IN
•
SHOULDER DIAMETER: 0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.092 INCHES MINIMUM AND 0.094 INCHES MAXIMUM IN
FASTENER LENGTH0.548 INCHES MINIMUM AND 0.578 INCHES MAXIMUM IN
SHOULDER LENGTH0.062 INCHES MINIMUM AND 0.064 INCHES MAXIMUM FIRST SHOULDER IN
SHOULDER DIAMETER0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
NOMINAL THREAD DIAMETER0.190 INCHES IN
THREAD DIRECTIONRIGHT-HAND
INTERNAL DRIVE STYLESLOT
THREAD CLASS2A A
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 187873?
187873 is a CIRCUIT BREAKER. It is classified as a MRO (MRO_GENERAL).
What is the NSN for 187873?
187873 is cataloged in the U.S. Government catalog under NSN 5305-00-207-4948. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.