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176C1979 — PLATE,RETAINING,BEARING

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

176C1979: PLATE,RETAINING,BEARING.

The PLATE,RETAINING,BEARING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4140 OVERALL, hardness_rating: 33.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM, minor_thickness: 0.040 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN, outside_diameter: 3.070 INCHES MINIMUM AND 3.110 INCHES MAXIMUM IN, style_designator: ROUND, aperture_diameter: 1.440 INCHES MINIMUM AND 1.480 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-121-7495, 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
176C1979
NSN: 3110-01-121-7495
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 05606 — GENERAL DYNAMICS-OTS, INC. DIV ORDNANCE AND TACTICAL SYSTEMS (USA)
SPECIFICATIONS
materialSTEEL COMP 4140 OVERALL
hardness_rating33.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
minor_thickness0.040 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
outside_diameter3.070 INCHES MINIMUM AND 3.110 INCHES MAXIMUM IN
style_designatorROUND
aperture_diameter1.440 INCHES MINIMUM AND 1.480 INCHES MAXIMUM IN
counterbore_depth1.120 INCHES NOMINAL IN
overall_thickness1.160 INCHES MINIMUM AND 1.200 INCHES MAXIMUM IN
mounting_hole_typeROUND, UNTHREADED
counterbore_diameter1.160 INCHES MINIMUM AND 1.180 INCHES MAXIMUM IN
mounting_hole_diameter0.285 INCHES MINIMUM AND 0.301 INCHES MAXIMUM IN
cross-sectional_shape_styleCOUNTERBORED W/ APERTURE
NSN3110-01-121-7495
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 176C1979 · 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
•
MINOR THICKNESS: 0.040 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
•
MOUNTING HOLE TYPE: ROUND, UNTHREADED
•
COUNTERBORE DIAMETER: 1.160 INCHES MINIMUM AND 1.180 INCHES MAXIMUM IN
•
COUNTERBORE DEPTH: 1.120 INCHES NOMINAL IN
•
OVERALL THICKNESS: 1.160 INCHES MINIMUM AND 1.200 INCHES MAXIMUM IN
•
HARDNESS RATING: 33.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: ROUND
•
MOUNTING HOLE DIAMETER: 0.285 INCHES MINIMUM AND 0.301 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
MINOR THICKNESS0.040 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN
MOUNTING HOLE TYPEROUND, UNTHREADED
COUNTERBORE DIAMETER1.160 INCHES MINIMUM AND 1.180 INCHES MAXIMUM IN
COUNTERBORE DEPTH1.120 INCHES NOMINAL IN
OVERALL THICKNESS1.160 INCHES MINIMUM AND 1.200 INCHES MAXIMUM IN
HARDNESS RATING33.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORROUND
MOUNTING HOLE DIAMETER0.285 INCHES MINIMUM AND 0.301 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLECOUNTERBORED W/ APERTURE
OUTSIDE DIAMETER3.070 INCHES MINIMUM AND 3.110 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
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 176C1979?
176C1979 is a PLATE,RETAINING,BEARING.
What is the NSN for 176C1979?
176C1979 is cataloged in the U.S. Government catalog under NSN 3110-01-121-7495. This indicates validated use in U.S. government and defense supply chains.
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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.