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FFW100 ✓ 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 material: STEEL COMP 316 OVERALL, head_style: PAN NO. 2, head_height: 0.122 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN, hole_diameter: 0.320 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-016-6108, 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
FFW100
NSN: 5310-00-016-6108
FSC: 5310
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL COMP 316 OVERALL
head_stylePAN NO. 2
head_height0.122 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM IN
hole_diameter0.320 INCHES MINIMUM AND 0.332 INCHES MAXIMUM IN
thread_length0.563 INCHES MINIMUM IN
heat_treatmentANNEALED
fastener_length0.625 INCHES NOMINAL IN
hardness_rating40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
washer_quantity1
outside_diameter0.588 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN
NSN5310-00-016-6108
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: FFW100 · 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
•
HOLE DIAMETER: 0.115 INCHES MINIMUM AND 0.123 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: COUNTERSINK EXTERNAL TEETH
•
COUNTERSINK ANGLE: 95.0 DEGREES MINIMUM AND 105.0 DEGREES MAXIMUM
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
OUTSIDE DIAMETER: 0.227 INCHES MINIMUM AND 0.247 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.013 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 1050 OR STEEL COMP 1551 OR STEEL COMP 1059 OR STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1064 OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER0.115 INCHES MINIMUM AND 0.123 INCHES MAXIMUM IN
STYLE DESIGNATORCOUNTERSINK EXTERNAL TEETH
COUNTERSINK ANGLE95.0 DEGREES MINIMUM AND 105.0 DEGREES MAXIMUM
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
OUTSIDE DIAMETER0.227 INCHES MINIMUM AND 0.247 INCHES MAXIMUM IN
MATERIAL THICKNESS0.013 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1050 OR STEEL COMP 1551 OR STEEL COMP 1059 OR STEEL COMP 1060 OR STEEL COMP 1561 OR STEEL COMP 1064 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 1
MS35790-109Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FFW100?
FFW100 is a WASHER,LOCK.
What parts can replace FFW100?
There is 1 known substitute for FFW100: MS35790-109. Substitute compatibility should be verified for your specific system.
What is the NSN for FFW100?
FFW100 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-016-6108. 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