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Technical Data Sheet
PartsTable / COMPONENT / FF-W-84
FF-W-84 ✓ 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,LOCK is a the manufacturer industrial component. Key specifications include color: YELLOW OVERALL, head_style: ROUND, head_height: 0.107 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.287 INCHES MINIMUM AND 0.309 INCHES MAXIMUM IN, hole_diameter: 0.377 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-003-4094, 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
FF-W-84
NSN: 5310-00-003-4094
FSC: 5310
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
colorYELLOW OVERALL
head_styleROUND
head_height0.107 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.287 INCHES MINIMUM AND 0.309 INCHES MAXIMUM IN
hole_diameter0.377 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN
thread_length0.282 INCHES MINIMUM AND 0.344 INCHES MAXIMUM IN
heat_treatmentQUENCHED AND TEMPERED
overall_height0.035 INCHES NOMINAL IN
fastener_length0.344 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
hardness_rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM
washer_quantity1
NSN5310-00-003-4094
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: FF-W-84 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
103323Interchangeable
interchangeable cross-reference
interchangeable
1-2MInterchangeable
interchangeable cross-reference
interchangeable
XX002-0695Interchangeable
interchangeable cross-reference
interchangeable
10505769Interchangeable
interchangeable cross-reference
interchangeable
Z09378423Interchangeable
interchangeable cross-reference
interchangeable
78423Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FF-W-84?
FF-W-84 is a WASHER,LOCK.
What parts can replace FF-W-84?
There are 21 known substitutes for FF-W-84: 103323, 1-2M, XX002-0695 and 18 more. Substitute compatibility should be verified for your specific system.
Is FF-W-84 still available?
FF-W-84 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