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Technical Data Sheet
6748569 ✓ 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 WASHER,KEY is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 2.130 INCHES MINIMUM AND 2.135 INCHES MAXIMUM IN, heat_treatment: AS FABRICATED, hardness_rating: 55.0 ROCKWELL B MAXIMUM, outside_diameter: 2.656 INCHES NOMINAL IN, style_designator: KEY. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-639-3865, 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
6748569
NSN: 5310-00-639-3865
FSC: 5310
CAGE: 73342 — ALLISON TRANSMISSION INC DBA ALLISON TRANSMISSION, INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter2.130 INCHES MINIMUM AND 2.135 INCHES MAXIMUM IN
heat_treatmentAS FABRICATED
hardness_rating55.0 ROCKWELL B MAXIMUM
outside_diameter2.656 INCHES NOMINAL IN
style_designatorKEY
surface_treatmentCADMIUM OVERALL
material_thickness0.068 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN
external_key_quantity17
external_prebent_key_width0.230 INCHES NOMINAL IN
internal_prebent_key_width0.235 INCHES MINIMUM AND 0.245 INCHES MAXIMUM IN
internal_prebent_key_length0.188 INCHES NOMINAL IN
NSN5310-00-639-3865
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6748569 · 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
OUTSIDE DIAMETER: 2.656 INCHES NOMINAL IN
MATERIAL THICKNESS: 0.068 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY: 17
HARDNESS RATING: 55.0 ROCKWELL B MAXIMUM
HEAT TREATMENT: AS FABRICATED
HOLE DIAMETER: 2.130 INCHES MINIMUM AND 2.135 INCHES MAXIMUM IN
MATERIAL: STEEL OVERALL
INTERNAL PREBENT KEY LENGTH: 0.188 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER2.656 INCHES NOMINAL IN
MATERIAL THICKNESS0.068 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN
EXTERNAL KEY QUANTITY17
HARDNESS RATING55.0 ROCKWELL B MAXIMUM
HEAT TREATMENTAS FABRICATED
HOLE DIAMETER2.130 INCHES MINIMUM AND 2.135 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
INTERNAL PREBENT KEY LENGTH0.188 INCHES NOMINAL IN
OVERALL DISTANCE INCLUDING KEYS3.109 INCHES NOMINAL IN
SURFACE TREATMENTCADMIUM OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
9039076Interchangeable
interchangeable cross-reference
interchangeable
82038-000Interchangeable
interchangeable cross-reference
interchangeable
4250-020-13Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6748569?
6748569 is a WASHER,KEY.
What parts can replace 6748569?
There are 3 known substitutes for 6748569: 9039076, 82038-000, 4250-020-13. Substitute compatibility should be verified for your specific system.
Is 6748569 still available?
6748569 is currently cancelled.
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