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Technical Data Sheet
PartsTable / COMPONENT / F171-3
F171-3 ✓ 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 SCREW,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OR STEEL COMP 8740 OR STEEL COMP 4340 OVERALL, nut_style: PLATE, head_style: FILLISTER EXTENDED WASHER, nut_height: 0.290 INCHES MAXIMUM IN, nut_length: 0.948 INCHES MAXIMUM IN, head_height: 0.437 INCHES NOMINAL 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 5310-00-003-9343, 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
F171-3
NSN: 5310-00-003-9343
FSC: 5310
CAGE: 72962 — HARVARD INDUSTRIES INC (USA)
SPECIFICATIONS
materialSTEEL COMP 4130 OR STEEL COMP 8740 OR STEEL COMP 4340 OVERALL
nut_stylePLATE
head_styleFILLISTER EXTENDED WASHER
nut_height0.290 INCHES MAXIMUM IN
nut_length0.948 INCHES MAXIMUM IN
head_height0.437 INCHES NOMINAL IN
lubricationDRY FILM LUBRICANT
plate_width0.416 INCHES MAXIMUM IN
temp_rating450.0 FAHRENHEIT NOMINAL DEGF
thread_class2A A
head_diameter0.300 INCHES MINIMUM AND 0.308 INCHES MAXIMUM IN
thread_length0.219 INCHES MINIMUM IN
NSN5310-00-003-9343
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: F171-3 · 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
•
FEATURES PROVIDED: FLOATING NUT
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS @6350 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6358 ASSN STD 2ND MATERIAL RESPONSE OR AMS6359 ASSN STD 3RD MATERIAL RESPONSE OVERALL
•
THREAD QUANTITY PER INCH: 32
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
PLATE WIDTH: 0.416 INCHES MAXIMUM IN
•
TEMP RATING: 450.0 FAHRENHEIT NOMINAL DEGF
•
DISTANCE FROM APERTURE CENTER TO MOUNTING HOLE CENTER: 0.339 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN
•
NUT STYLE: PLATE
TECHNICAL CHARACTERISTICS (FLIS)
FEATURES PROVIDEDFLOATING NUT
MATERIAL DOCUMENT AND CLASSIFICATIONAMS @6350 ASSN STD 1ST MATERIAL RESPONSE OR AMS 6358 ASSN STD 2ND MATERIAL RESPONSE OR AMS6359 ASSN STD 3RD MATERIAL RESPONSE OVERALL
THREAD QUANTITY PER INCH32
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
PLATE WIDTH0.416 INCHES MAXIMUM IN
TEMP RATING450.0 FAHRENHEIT NOMINAL DEGF
DISTANCE FROM APERTURE CENTER TO MOUNTING HOLE CENTER0.339 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN
NUT STYLEPLATE
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG LENGTH0.686 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN
COUNTERBORE DIAMETER0.194 INCHES MINIMUM NUT IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
EB4516Interchangeable
interchangeable cross-reference
interchangeable
BB17973Interchangeable
interchangeable cross-reference
interchangeable
F1713Interchangeable
interchangeable cross-reference
interchangeable
993L03X1LInterchangeable
interchangeable cross-reference
interchangeable
436-0002Interchangeable
interchangeable cross-reference
interchangeable
BACN10JB3Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is F171-3?
F171-3 is a SCREW,MACHINE.
What parts can replace F171-3?
There are 6 known substitutes for F171-3: EB4516, BB17973, F1713 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for F171-3?
F171-3 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-003-9343. 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