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PartsTable / COMPONENT / W2551-22
W2551-22 ✓ 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 NUT,PLAIN,CLINCH is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: CLINCH, nut_height: 0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN, nut_diameter: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN, pilot_length: 0.058 INCHES MINIMUM AND 0.061 INCHES MAXIMUM IN, thread_class: 3B. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-596-8136, 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
W2551-22
NSN: 5310-00-596-8136
FSC: 5310
CAGE: 11530 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN INFORMATION SYSTEMS & GLOBAL SOLUTIONS (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleCLINCH
nut_height0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
nut_diameter0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
pilot_length0.058 INCHES MINIMUM AND 0.061 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNF
pilot_diameter0.266 INCHES MINIMUM AND 0.269 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
nominal_thread_size0.190 INCHES IN
thread_quantity_per_inch32
NSN5310-00-596-8136
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: W2551-22 · 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
•
NUT STYLE: CLINCH
•
THREAD SERIES: UNF
•
NOMINAL THREAD SIZE: 0.190 INCHES IN
•
THREAD QUANTITY PER INCH: 32
•
NUT DIAMETER: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
PILOT LENGTH: 0.058 INCHES MINIMUM AND 0.061 INCHES MAXIMUM IN
•
NUT HEIGHT: 0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLECLINCH
THREAD SERIESUNF
NOMINAL THREAD SIZE0.190 INCHES IN
THREAD QUANTITY PER INCH32
NUT DIAMETER0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
PILOT LENGTH0.058 INCHES MINIMUM AND 0.061 INCHES MAXIMUM IN
NUT HEIGHT0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
PILOT DIAMETER0.266 INCHES MINIMUM AND 0.269 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
188223Interchangeable
interchangeable cross-reference
interchangeable
FFB187/01-TYPE ABMA 02420Interchangeable
interchangeable cross-reference
interchangeable
019-35P125Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is W2551-22?
W2551-22 is a NUT,PLAIN,CLINCH.
What parts can replace W2551-22?
There are 3 known substitutes for W2551-22: 188223, FFB187/01-TYPE ABMA 02420, 019-35P125. Substitute compatibility should be verified for your specific system.
What is the NSN for W2551-22?
W2551-22 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-596-8136. 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