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Technical Data Sheet
PartsTable / COMPONENT / T289
T289 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The BATTERY,NONRECHARGEABLE is a the manufacturer cache protection component designed to preserve data integrity during power loss events in enterprise server and storage controller environments. Key specifications include material: STEEL OVERALL, hole_diameter: 1.615 INCHES MINIMUM AND 1.635 INCHES MAXIMUM IN, outside_diameter: 2.052 INCHES MINIMUM AND 2.072 INCHES MAXIMUM IN, style_designator: KEY, material_thickness: 0.055 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN, external_straight_key_width: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-282-0501, 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
T289
NSN: 5310-00-282-0501
FSC: 5310
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter1.615 INCHES MINIMUM AND 1.635 INCHES MAXIMUM IN
outside_diameter2.052 INCHES MINIMUM AND 2.072 INCHES MAXIMUM IN
style_designatorKEY
material_thickness0.055 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
external_key_quantity2
internal_key_quantity1
external_straight_key_width0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
internal_straight_key_width0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
external_straight_key_length0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
overall_distance_including_keys2.365 INCHES MINIMUM AND 2.385 INCHES MAXIMUM IN
distance_from_centerline_to_top_of_internal_key0.53125 INCHES NOMINAL IN
NSN5310-00-282-0501
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: T289 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
HOLE DIAMETER: 1.615 INCHES MINIMUM AND 1.635 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
MATERIAL THICKNESS: 0.055 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
•
EXTERNAL STRAIGHT KEY LENGTH: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
•
INTERNAL STRAIGHT KEY WIDTH: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
•
EXTERNAL STRAIGHT KEY WIDTH: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
•
OVERALL DISTANCE INCLUDING KEYS: 2.365 INCHES MINIMUM AND 2.385 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: KEY
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER1.615 INCHES MINIMUM AND 1.635 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
MATERIAL THICKNESS0.055 INCHES MINIMUM AND 0.075 INCHES MAXIMUM IN
EXTERNAL STRAIGHT KEY LENGTH0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
INTERNAL STRAIGHT KEY WIDTH0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
EXTERNAL STRAIGHT KEY WIDTH0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
OVERALL DISTANCE INCLUDING KEYS2.365 INCHES MINIMUM AND 2.385 INCHES MAXIMUM IN
STYLE DESIGNATORKEY
OUTSIDE DIAMETER2.052 INCHES MINIMUM AND 2.072 INCHES MAXIMUM IN
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY0.53125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
1810MInterchangeable
interchangeable cross-reference
interchangeable
T289Interchangeable
interchangeable cross-reference
interchangeable
1810Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is T289?
T289 is a BATTERY,NONRECHARGEABLE.
What parts can replace T289?
There are 3 known substitutes for T289: 1810M, T289, 1810. Substitute compatibility should be verified for your specific system.
Is T289 still available?
T289 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: July 2026