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FFW84A — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

FFW84A: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.115 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN, hardness_rating: 35.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM, outside_diameter: 0.209 INCHES MAXIMUM IN, style_designator: SPLIT HELICAL-RIGHT HAND, surface_treatment: ZINC OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-184-9137, 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
FFW84A
NSN: 5310-00-184-9137
NIINs: 001849137, 002094444, 002096068, 002258384, 002617435, 002617437, 002617542, 002618278, 002623562, 002717450, 002753678, 005273267, 005767083, 005794654, 006191018, 006395001, 006875934, 007544606, 008085381, 008935637, 009265882, 011350875
FSC: 5310 — Nuts and Washers
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.115 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN
hardness_rating35.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM
outside_diameter0.209 INCHES MAXIMUM IN
style_designatorSPLIT HELICAL-RIGHT HAND
surface_treatmentZINC OVERALL
material_thickness0.025 INCHES MINIMUM IN
nondefinitive_spec/std_dataB CLASS AND 2 STYLE
specification/standard_data80205-NAS1676 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
departure_from_cited_designatorAS MODIFIED BY DIM.
material_document_and_classification66 FED STD SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-C-13924,CL 4 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5310-00-184-9137
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: FFW84A · 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: SPLIT HELICAL-RIGHT HAND
•
OUTSIDE DIAMETER: 0.875 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.135 INCHES NOMINAL IN
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
HOLE DIAMETER: 0.636 INCHES MINIMUM AND 0.653 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
OUTSIDE DIAMETER0.875 INCHES NOMINAL IN
MATERIAL THICKNESS0.135 INCHES NOMINAL IN
MATERIALSTEEL CORROSION RESISTING OVERALL
HOLE DIAMETER0.636 INCHES MINIMUM AND 0.653 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 1
414908PC21Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is FFW84A?
FFW84A is a WASHER,LOCK.
What parts can replace FFW84A?
There is 1 known substitute for FFW84A: 414908PC21. Substitute compatibility should be verified for your specific system.
What is the NSN for FFW84A?
FFW84A is cataloged in the U.S. Government catalog under NSN 5310-00-184-9137. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.