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PartsTable / COMPONENT / 55AC17065
55AC17065 ✓ 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: 0.625 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN, outside_diameter: 1.250 INCHES NOMINAL IN, style_designator: KEY, features_provided: CASEHARDENED, material_thickness: 0.125 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-518-6716, 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
55AC17065
NSN: 5310-00-518-6716
FSC: 5310
CAGE: 23382 — FWD SEAGRAVE HOLDINGS LP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.625 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
outside_diameter1.250 INCHES NOMINAL IN
style_designatorKEY
features_providedCASEHARDENED
material_thickness0.125 INCHES NOMINAL IN
internal_key_quantity1
internal_straight_key_width0.125 INCHES NOMINAL IN
distance_from_centerline_to_top_of_internal_key0.2525 INCHES NOMINAL IN
NSN5310-00-518-6716
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 55AC17065 · 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
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 0.2525 INCHES NOMINAL IN
•
INTERNAL KEY QUANTITY: 1
•
HOLE DIAMETER: 0.625 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 1.250 INCHES NOMINAL IN
•
FEATURES PROVIDED: CASEHARDENED
•
STYLE DESIGNATOR: KEY
•
MATERIAL: STEEL OVERALL
•
MATERIAL THICKNESS: 0.125 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY0.2525 INCHES NOMINAL IN
INTERNAL KEY QUANTITY1
HOLE DIAMETER0.625 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN
OUTSIDE DIAMETER1.250 INCHES NOMINAL IN
FEATURES PROVIDEDCASEHARDENED
STYLE DESIGNATORKEY
MATERIALSTEEL OVERALL
MATERIAL THICKNESS0.125 INCHES NOMINAL IN
INTERNAL STRAIGHT KEY WIDTH0.125 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
A-A-59606/2Interchangeable
interchangeable cross-reference
interchangeable
500810Interchangeable
interchangeable cross-reference
interchangeable
8713382Interchangeable
interchangeable cross-reference
interchangeable
R51Interchangeable
interchangeable cross-reference
interchangeable
510Interchangeable
interchangeable cross-reference
interchangeable
25651Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 55AC17065?
55AC17065 is a WASHER,KEY.
What parts can replace 55AC17065?
There are 17 known substitutes for 55AC17065: A-A-59606/2, 500810, 8713382 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 55AC17065?
55AC17065 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-518-6716. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026