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M178 — MONITOR METER ASSEMBLY

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

M178: MONITOR METER ASSEMBLY.

The MONITOR METER ASSEMBLY is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYAMIDE NYLON OVERALL, bore_shape: STRAIGHT, corner_shape: ROUND LEFT FLANGE BODY CORNER, flange_width: 0.0540 INCHES MINIMUM AND 0.0740 INCHES MAXIMUM IN, bore_diameter: 45.00 MILLIMETERS NOMINAL MM, contact_angle: 25.0 DEGREES MAXIMUM. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-156-6844, 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
M178
NSN: 3110-00-156-6844
NIINs: 001566844, 002014427, 005543288, 007082249
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 16760 — CRYOGENIC EQUIPMENT INC (USA)
SPECIFICATIONS
materialPLASTIC POLYAMIDE NYLON OVERALL
bore_shapeSTRAIGHT
corner_shapeROUND LEFT FLANGE BODY CORNER
flange_width0.0540 INCHES MINIMUM AND 0.0740 INCHES MAXIMUM IN
bore_diameter45.00 MILLIMETERS NOMINAL MM
contact_angle25.0 DEGREES MAXIMUM
overall_width25.00 MILLIMETERS NOMINAL MM
terminal_typeTAB W/SCREW
load_directionRADIAL
overall_height2.500 INCHES NOMINAL IN
overall_length0.2400 INCHES MINIMUM AND 0.2800 INCHES MAXIMUM IN
surface_finish125.0 MICROINCHES OVERALL
NSN3110-00-156-6844
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: M178 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SURFACE FINISH: GROUND
•
STYLE DESIGNATOR: COUNTERBORED OUTER RING, NON-SEPARABLE
•
OVERALL OUTSIDE DIAMETER: 100.00 MILLIMETERS NOMINAL MM
•
BORE SHAPE: STRAIGHT
•
CONTACT ANGLE: 25.0 DEGREES MAXIMUM
•
LOAD DIRECTION: ANGULAR
•
STANDARD TOLERANCE DESIGNATION: ABEC NO.1
TECHNICAL CHARACTERISTICS
SURFACE FINISHGROUND
STYLE DESIGNATORCOUNTERBORED OUTER RING, NON-SEPARABLE
OVERALL WIDTH25.0 MILLIMETERS NOMINAL MM
OVERALL OUTSIDE DIAMETER100.00 MILLIMETERS NOMINAL MM
BORE SHAPESTRAIGHT
CONTACT ANGLE25.0 DEGREES MAXIMUM
LOAD DIRECTIONANGULAR
STANDARD TOLERANCE DESIGNATIONABEC NO.1
BORE DIAMETER45.00 MILLIMETERS NOMINAL MM
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 7
H20309Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
7309Reference document
Same NSN cross-reference
Reference document — Secondary reference
358193Reference document
Same NSN cross-reference
Reference document — Secondary reference
BB1743Reference document
Same NSN cross-reference
Reference document — Secondary reference
20309Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
20309-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is M178?
M178 is a MONITOR METER ASSEMBLY.
What parts can replace M178?
There are 7 known substitutes for M178: H20309, 7309, 358193 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M178?
M178 is cataloged in the U.S. Government catalog under NSN 3110-00-156-6844. 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.