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K91511 ✓ 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: 2.182 INCHES MINIMUM AND 2.207 INCHES MAXIMUM IN, outside_diameter: 3.235 INCHES MINIMUM AND 3.265 INCHES MAXIMUM IN, style_designator: KEY, material_thickness: 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN, internal_straight_key_width: 0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM 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 5310-01-054-1549, 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
K91511
NSN: 5310-01-054-1549
FSC: 5310
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter2.182 INCHES MINIMUM AND 2.207 INCHES MAXIMUM IN
outside_diameter3.235 INCHES MINIMUM AND 3.265 INCHES MAXIMUM IN
style_designatorKEY
material_thickness0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
internal_key_quantity1
internal_straight_key_width0.250 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN
material_document_and_classificationSAE ASSN STD ALL MATERIAL RESPONSES OVERALL
distance_from_centerline_to_top_of_internal_key0.981 INCHES MINIMUM AND 0.984 INCHES MAXIMUM IN
NSN5310-01-054-1549
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: K91511 · 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
•
INTERNAL STRAIGHT KEY WIDTH: 0.290 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD ALL MATERIAL RESPONSES OVERALL
•
STYLE DESIGNATOR: KEY
•
MATERIAL: STEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 0.880 INCHES NOMINAL IN
•
HOLE DIAMETER: 2.182 INCHES MINIMUM AND 2.207 INCHES MAXIMUM IN
•
INTERNAL KEY QUANTITY: 1
•
MATERIAL THICKNESS: 0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL STRAIGHT KEY WIDTH0.290 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD ALL MATERIAL RESPONSES OVERALL
STYLE DESIGNATORKEY
MATERIALSTEEL COMP 1010 OR STEEL COMP 1012 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OVERALL
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY0.880 INCHES NOMINAL IN
HOLE DIAMETER2.182 INCHES MINIMUM AND 2.207 INCHES MAXIMUM IN
INTERNAL KEY QUANTITY1
MATERIAL THICKNESS0.156 INCHES MINIMUM AND 0.176 INCHES MAXIMUM IN
OUTSIDE DIAMETER3.235 INCHES MINIMUM AND 3.265 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
85885Interchangeable
interchangeable cross-reference
interchangeable
70857Interchangeable
interchangeable cross-reference
interchangeable
211-504Interchangeable
interchangeable cross-reference
interchangeable
K91511Interchangeable
interchangeable cross-reference
interchangeable
5428113Interchangeable
interchangeable cross-reference
interchangeable
TUBO ENDOTRAQUEAL DIR TAM 35FInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is K91511?
K91511 is a WASHER,KEY.
What parts can replace K91511?
There are 6 known substitutes for K91511: 85885, 70857, 211-504 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for K91511?
K91511 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-054-1549. 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