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PartsTable / COMPONENT / FFB571TYPEA2CLASSC
FFB571TYPEA2CLASSC ✓ 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 NUT,PLAIN,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, nut_height: 0.969 INCHES NOMINAL IN, thread_class: 2B, thread_series: UNF, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-265-9217, 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
FFB571TYPEA2CLASSC
NSN: 5310-00-265-9217
FSC: 5310
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
nut_height0.969 INCHES NOMINAL IN
thread_class2B
thread_seriesUNF
thread_directionRIGHT-HAND
width_across_flats0.813 INCHES NOMINAL IN
nominal_thread_size0.500 INCHES IN
bearing_surface_typeCHAMFERED OR WASHER FACED
thread_quantity_per_inch20
nondefinitive_spec/std_dataA2 TYPE AND C CLASS
NSN5310-00-265-9217
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: FFB571TYPEA2CLASSC · 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
•
WIDTH ACROSS FLATS: 0.813 INCHES NOMINAL IN
•
NUT HEIGHT: 0.844 INCHES NOMINAL IN
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
•
THREAD QUANTITY PER INCH: 20
•
THREAD SERIES: UNF
•
NOMINAL THREAD SIZE: 0.500 INCHES IN
•
MATERIAL: STEEL OVERALL
•
NONDEFINITIVE SPEC/STD DATA: A2 TYPE AND C CLASS
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH ACROSS FLATS0.813 INCHES NOMINAL IN
NUT HEIGHT0.844 INCHES NOMINAL IN
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
THREAD QUANTITY PER INCH20
THREAD SERIESUNF
NOMINAL THREAD SIZE0.500 INCHES IN
MATERIALSTEEL OVERALL
NONDEFINITIVE SPEC/STD DATAA2 TYPE AND C CLASS
NUT STYLEHEXAGON
THREAD CLASS2B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
C270X1727JP17DInterchangeable
interchangeable cross-reference
interchangeable
C270Interchangeable
interchangeable cross-reference
interchangeable
C270X1727WInterchangeable
interchangeable cross-reference
interchangeable
FFB571TYPEA2CLASSCInterchangeable
interchangeable cross-reference
interchangeable
18277R1Interchangeable
interchangeable cross-reference
interchangeable
PB26462-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FFB571TYPEA2CLASSC?
FFB571TYPEA2CLASSC is a NUT,PLAIN,HEXAGON.
What parts can replace FFB571TYPEA2CLASSC?
There are 8 known substitutes for FFB571TYPEA2CLASSC: C270X1727JP17D, C270, C270X1727W and 5 more. Substitute compatibility should be verified for your specific system.
Is FFB571TYPEA2CLASSC still available?
FFB571TYPEA2CLASSC 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