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515618 ✓ Verified by PartsTable
EMSA · 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

- Size: 0.5L (16.91 fl. oz.)<br>- With Soft-Touch collar<br>- With double-walled stainless-steel liner<br>- 100% leak-proof<br>- Opens with the press of a button<br>- 360° drinking from all sides<br>- Closure can be taken apart for easy cleaning This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-053-1366, 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
515618
NSN: 5310-00-053-1366
FSC: 5310
CAGE: 04660 — AIL SYSTEMS INC SUB OF EATON CORP (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
nut_styleCLINCH
nut_height0.189 INCHES NOMINAL IN
lubricationDRY FILM LUBRICANT
temp_rating450.0 FAHRENHEIT NOMINAL DEGF
pilot_length0.054 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
pilot_diameter0.185 INCHES MAXIMUM IN
hardness_rating70.0 ROCKWELL C MINIMUM
locking_featurePREVAILING TORQUE ALL METAL DESIGN
thread_directionRIGHT-HAND
NSN5310-00-053-1366
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 515618 · EMSA ⚠ 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
•
THREAD QUANTITY PER INCH: 40
•
NUT HEIGHT: 0.189 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
TEMP RATING: 450.0 FAHRENHEIT NOMINAL DEGF
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
•
NUT STYLE: CLINCH
•
HARDNESS RATING: 70.0 ROCKWELL C MINIMUM
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH40
NUT HEIGHT0.189 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
TEMP RATING450.0 FAHRENHEIT NOMINAL DEGF
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
NUT STYLECLINCH
HARDNESS RATING70.0 ROCKWELL C MINIMUM
NOMINAL THREAD SIZE0.112 INCHES IN
PILOT DIAMETER0.185 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
515618Interchangeable
interchangeable cross-reference
interchangeable
10122031Interchangeable
interchangeable cross-reference
interchangeable
201481-11Interchangeable
interchangeable cross-reference
interchangeable
M45938/7-2Interchangeable
interchangeable cross-reference
interchangeable
4132686-01Interchangeable
interchangeable cross-reference
interchangeable
4132686Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 515618?
515618 is a NUT,SELF-LOCKING,CLINCH manufactured by EMSA.
What parts can replace 515618?
There are 14 known substitutes for 515618: 515618, 10122031, 201481-11 and 11 more. Substitute compatibility should be verified for your specific system.
Is 515618 still available?
515618 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