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M571 — BEARING,ROLLER,NEEDLE

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

M571: BEARING,ROLLER,NEEDLE.

The BEARING,ROLLER,NEEDLE is a the manufacturer industrial component. Key specifications include focusing_type: ADJUSTABLE, magnification: 5.0 MINIMUM AND 25.0 MAXIMUM, scale_markings: PROVIDED, magnification_type: VARIABLE, optical_device_type: LENS, reticle_style_designator: VERTICALLY GRADUATED. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-108-7939, 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
M571
NSN: 3110-00-108-7939
NIINs: 001087939, 016714964
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 60380 — TIMKEN AEROSPACE, INC DBA TORRINGTON PRODUCT (USA)
SPECIFICATIONS
focusing_typeADJUSTABLE
magnification5.0 MINIMUM AND 25.0 MAXIMUM
scale_markingsPROVIDED
magnification_typeVARIABLE
optical_device_typeLENS
reticle_style_designatorVERTICALLY GRADUATED
accessory_components_and_quantity1 MULTITOOL - T6, 1/16 HEX, 6/64 HEX;56MM ANTI-REFLECTIVE DEVICE;56MM PASSIVE OPTICAL FILTER MM
part_name_assigned_by_controlling_agencySIGHT, BORE, OPTICAL
NSN3110-00-108-7939
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: M571 · 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
•
OVERALL OUTSIDE DIAMETER: 0.5000 INCHES NOMINAL IN
•
ALIGNMENT TYPE: RIGID
•
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
•
BORE DIAMETER: 0.3120 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL OUTSIDE DIAMETER0.5000 INCHES NOMINAL IN
ALIGNMENT TYPERIGID
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
BORE DIAMETER0.3120 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
X1302Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is M571?
M571 is a BEARING,ROLLER,NEEDLE.
What parts can replace M571?
There is 1 known substitute for M571: X1302. Substitute compatibility should be verified for your specific system.
What is the NSN for M571?
M571 is cataloged in the U.S. Government catalog under NSN 3110-00-108-7939. 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.