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Technical Data Sheet
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181-275 — Technical Data Sheet

✓ Verified by PartsTable
Hama · TAPERED BEARING
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

- Flexible cover with especially silky rubber finish for a pleasant touch<br>- Protects the back of the smartphone from dirt and scratches. Key specifications include material: STEEL OVERALL, overall_width: 0.7500 INCHES NOMINAL IN, outside_diameter: 2.8750 INCHES NOMINAL IN, style_designator: NORMAL ANGLE, backface_corner_radius: 0.0938 INCHES NOMINAL IN, standard_tolerance_designation: AFBMA CLASS 2. This part is cataloged in the Federal Logistics Information System under NSN 3110-00-100-0550, 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
181-275
NSN: 3110-00-100-0550
FSC: 3110
CAGE: 35301 — DRESSER INDUSTRIES INC LEROI DIV (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_width0.7500 INCHES NOMINAL IN
outside_diameter2.8750 INCHES NOMINAL IN
style_designatorNORMAL ANGLE
backface_corner_radius0.0938 INCHES NOMINAL IN
standard_tolerance_designationAFBMA CLASS 2
NSN3110-00-100-0550
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 181-275 · Hama ⚠ 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
•
BACKFACE CORNER RADIUS: 0.0938 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: NORMAL ANGLE
•
OUTSIDE DIAMETER: 2.8750 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA CLASS 2
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS
BACKFACE CORNER RADIUS0.0938 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
STYLE DESIGNATORNORMAL ANGLE
OUTSIDE DIAMETER2.8750 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
OVERALL WIDTH0.7500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
H36920InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
1540-20InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
J51 TYPE BInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
25820InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
A25820InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
5502-3InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 181-275?
181-275 is a CUP,TAPERED ROLLER BEARING manufactured by Hama.
What parts can replace 181-275?
There are 19 known substitutes for 181-275: H36920, 1540-20, J51 TYPE B and 16 more. Substitute compatibility should be verified for your specific system.
Is 181-275 still available?
181-275 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: September 2026