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Technical Data Sheet
PartsTable / COMPONENT / 0121761-1
0121761-1 ✓ 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: 1.375 INCHES NOMINAL IN, outside_diameter: 2.625 INCHES NOMINAL IN, style_designator: KEY, material_thickness: 0.062 INCHES NOMINAL IN, internal_prebent_key_width: 0.344 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 5310-00-431-2157, 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
0121761-1
NSN: 5310-00-431-2157
FSC: 5310
CAGE: 89926 — NEW HOLLAND CONSTRUCTION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter1.375 INCHES NOMINAL IN
outside_diameter2.625 INCHES NOMINAL IN
style_designatorKEY
material_thickness0.062 INCHES NOMINAL IN
internal_prebent_key_width0.344 INCHES NOMINAL IN
internal_prebent_key_length0.156 INCHES NOMINAL IN
distance_from_centerline_to_inside_of_prebent_key1.062 INCHES NOMINAL IN
NSN5310-00-431-2157
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 0121761-1 · 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
•
STYLE DESIGNATOR: KEY
•
MATERIAL: STEEL OVERALL
•
INTERNAL PREBENT KEY WIDTH: 0.344 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 2.625 INCHES NOMINAL IN
•
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY: 1.062 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.062 INCHES NOMINAL IN
•
INTERNAL PREBENT KEY LENGTH: 0.156 INCHES NOMINAL IN
•
HOLE DIAMETER: 1.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORKEY
MATERIALSTEEL OVERALL
INTERNAL PREBENT KEY WIDTH0.344 INCHES NOMINAL IN
OUTSIDE DIAMETER2.625 INCHES NOMINAL IN
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY1.062 INCHES NOMINAL IN
MATERIAL THICKNESS0.062 INCHES NOMINAL IN
INTERNAL PREBENT KEY LENGTH0.156 INCHES NOMINAL IN
HOLE DIAMETER1.375 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
21761Interchangeable
interchangeable cross-reference
interchangeable
PM-21761Interchangeable
interchangeable cross-reference
interchangeable
S17C92407-3442Interchangeable
interchangeable cross-reference
interchangeable
21761-4Interchangeable
interchangeable cross-reference
interchangeable
11162Interchangeable
interchangeable cross-reference
interchangeable
6515NCM093244Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 0121761-1?
0121761-1 is a WASHER,KEY.
What parts can replace 0121761-1?
There are 7 known substitutes for 0121761-1: 21761, PM-21761, S17C92407-3442 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 0121761-1?
0121761-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-431-2157. 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