PartsTable
Technical Data Sheet
PartsTable / COMPONENT / R18543
R18543 ✓ 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 KEY,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, flat_height: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN, overall_width: 0.998 INCHES MINIMUM AND 1.002 INCHES MAXIMUM IN, overall_height: 0.998 INCHES MINIMUM AND 1.002 INCHES MAXIMUM IN, overall_length: 2.998 INCHES MINIMUM AND 3.002 INCHES MAXIMUM IN, style_designator: STEPPED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-430-9498, 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
R18543
NSN: 5315-00-430-9498
FSC: 5315
CAGE: 23926 — KOMATSU AMERICA CORPORATION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
flat_height0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
overall_width0.998 INCHES MINIMUM AND 1.002 INCHES MAXIMUM IN
overall_height0.998 INCHES MINIMUM AND 1.002 INCHES MAXIMUM IN
overall_length2.998 INCHES MINIMUM AND 3.002 INCHES MAXIMUM IN
style_designatorSTEPPED
first_flat_length2.500 INCHES NOMINAL IN
starting_edge_shapeSTRAIGHT
NSN5315-00-430-9498
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: R18543 · 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
•
FLAT HEIGHT: 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
•
FIRST FLAT LENGTH: 2.500 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STARTING EDGE SHAPE: STRAIGHT
•
STYLE DESIGNATOR: STEPPED
TECHNICAL CHARACTERISTICS (FLIS)
FLAT HEIGHT0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN
OVERALL LENGTH2.998 INCHES MINIMUM AND 3.002 INCHES MAXIMUM IN
OVERALL WIDTH0.998 INCHES MINIMUM AND 1.002 INCHES MAXIMUM IN
FIRST FLAT LENGTH2.500 INCHES NOMINAL IN
OVERALL HEIGHT0.998 INCHES MINIMUM AND 1.002 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
STARTING EDGE SHAPESTRAIGHT
STYLE DESIGNATORSTEPPED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
1F9080Interchangeable
interchangeable cross-reference
interchangeable
18543Interchangeable
interchangeable cross-reference
interchangeable
3876192Interchangeable
interchangeable cross-reference
interchangeable
S1M0027Interchangeable
interchangeable cross-reference
interchangeable
A2008 REDInterchangeable
interchangeable cross-reference
interchangeable
856649-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy R18543?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is R18543?
R18543 is a KEY,MACHINE.
What parts can replace R18543?
There are 11 known substitutes for R18543: 1F9080, 18543, 3876192 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R18543?
R18543 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-430-9498. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — R18543

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026