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FFB571 — NUT,PLAIN,HEXAGON

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

FFB571: NUT,PLAIN,HEXAGON.

The NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, head_style: HEXAGON, neck_width: 0.375 INCHES NOMINAL IN, nut_height: 0.724 INCHES MINIMUM AND 0.776 INCHES MAXIMUM IN, grip_length: 2.000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-010-3025, 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
FFB571
NSN: 5310-00-010-3025
NIINs: 000103025, 000121956, 000124818, 000218563, 000220068, 000591224, 000591225, 001511904, 001513464, 001513476, 001768162, 001768170, 001775675, 002064789, 002073293, 002074612, 002074660, 002081971, 002082091, 002818922, 002818923, 002820125, 002820129, 002829040, 005147529, 005147531, 005147533, 005147534, 005149262, 005825952, 005969539, 006393312, 006393314, 007260728, 007320558, 007638912
FSC: 5310 — Nuts and Washers
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
head_styleHEXAGON
neck_width0.375 INCHES NOMINAL IN
nut_height0.724 INCHES MINIMUM AND 0.776 INCHES MAXIMUM IN
grip_length2.000 INCHES NOMINAL IN
head_height0.365 INCHES MINIMUM AND 0.386 INCHES MAXIMUM IN
neck_length0.281 INCHES NOMINAL IN
thread_class2B
head_diameter0.813 INCHES NOMINAL IN
thread_length1.000 INCHES MINIMUM IN
thread_seriesUNF
NSN5310-00-010-3025
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: FFB571 · 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
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESSQUARE NUT; HEAVY
SUBSTITUTES & CROSS-REFERENCES 10
G32S4Reference document
Same NSN cross-reference
Reference document — Secondary reference
0910233-6Reference document
Same NSN cross-reference
Reference document — Secondary reference
103025Reference document
Same NSN cross-reference
Reference document — Secondary reference
BB9962Reference document
Same NSN cross-reference
Reference document — Secondary reference
325604PC6Reference document
Same NSN cross-reference
Reference document — Secondary reference
DX581Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is FFB571?
FFB571 is a NUT,PLAIN,HEXAGON.
What parts can replace FFB571?
There are 10 known substitutes for FFB571: G32S4, 0910233-6, 103025 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FFB571?
FFB571 is cataloged in the U.S. Government catalog under NSN 5310-00-010-3025. 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.