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PartsTable / COMPONENT / 1A4516
1A4516 ✓ 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: 1.011 INCHES MINIMUM AND 1.021 INCHES MAXIMUM IN, outside_diameter: 1.870 INCHES MINIMUM AND 1.880 INCHES MAXIMUM IN, style_designator: KEY, material_thickness: 0.042 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN, internal_prebent_key_width: 0.276 INCHES MINIMUM AND 0.286 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-833-1481, 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
1A4516
NSN: 5310-00-833-1481
FSC: 5310
CAGE: 95201 — NAPCO INTERNATIONAL LLC DBA NAPCO INTERNATIONAL INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter1.011 INCHES MINIMUM AND 1.021 INCHES MAXIMUM IN
outside_diameter1.870 INCHES MINIMUM AND 1.880 INCHES MAXIMUM IN
style_designatorKEY
material_thickness0.042 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
internal_prebent_key_width0.276 INCHES MINIMUM AND 0.286 INCHES MAXIMUM IN
internal_prebent_key_length0.042 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
distance_from_centerline_to_inside_of_prebent_key0.651 INCHES MINIMUM AND 0.661 INCHES MAXIMUM IN
NSN5310-00-833-1481
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 1A4516 · 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
•
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY: 0.651 INCHES MINIMUM AND 0.661 INCHES MAXIMUM IN
•
INTERNAL PREBENT KEY WIDTH: 0.276 INCHES MINIMUM AND 0.286 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.042 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 1.870 INCHES MINIMUM AND 1.880 INCHES MAXIMUM IN
•
HOLE DIAMETER: 1.011 INCHES MINIMUM AND 1.021 INCHES MAXIMUM IN
•
INTERNAL PREBENT KEY LENGTH: 0.042 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORKEY
MATERIALSTEEL OVERALL
DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY0.651 INCHES MINIMUM AND 0.661 INCHES MAXIMUM IN
INTERNAL PREBENT KEY WIDTH0.276 INCHES MINIMUM AND 0.286 INCHES MAXIMUM IN
MATERIAL THICKNESS0.042 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
OUTSIDE DIAMETER1.870 INCHES MINIMUM AND 1.880 INCHES MAXIMUM IN
HOLE DIAMETER1.011 INCHES MINIMUM AND 1.021 INCHES MAXIMUM IN
INTERNAL PREBENT KEY LENGTH0.042 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
UAT83483AOInterchangeable
interchangeable cross-reference
interchangeable
LOCTITE LB 8700Interchangeable
interchangeable cross-reference
interchangeable
MOLY-50Interchangeable
interchangeable cross-reference
interchangeable
6303Interchangeable
interchangeable cross-reference
interchangeable
STKX109Interchangeable
interchangeable cross-reference
interchangeable
26203-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1A4516?
1A4516 is a WASHER,KEY.
What parts can replace 1A4516?
There are 15 known substitutes for 1A4516: UAT83483AO, LOCTITE LB 8700, MOLY-50 and 12 more. Substitute compatibility should be verified for your specific system.
Is 1A4516 still available?
1A4516 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