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Technical Data Sheet
PartsTable / COMPONENT / FFB571ANDTYPEC2
FFB571ANDTYPEC2 ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The BOLT,SQUARE NECK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: BUTTON, neck_width: 0.625 INCHES NOMINAL IN, head_height: 0.313 INCHES NOMINAL IN, neck_length: 0.406 INCHES NOMINAL IN, thread_class: 2A A. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-207-4660, 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
FFB571ANDTYPEC2
NSN: 5306-00-207-4660
FSC: 5306
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleBUTTON
neck_width0.625 INCHES NOMINAL IN
head_height0.313 INCHES NOMINAL IN
neck_length0.406 INCHES NOMINAL IN
thread_class2A A
head_diameter1.313 INCHES NOMINAL IN
thread_length1.750 INCHES MINIMUM IN
fastener_length10.000 INCHES NOMINAL IN
thread_directionRIGHT-HAND
features_providedSQUARE NUT
nominal_thread_diameter0.625 INCHES IN
NSN5306-00-207-4660
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: FFB571ANDTYPEC2 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL: STEEL OVERALL
•
THREAD QUANTITY PER INCH: 11
•
HEAD DIAMETER: 1.313 INCHES NOMINAL IN
•
NECK LENGTH: 0.406 INCHES NOMINAL IN
•
NONDEFINITIVE SPEC/STD DATA: C2 TYPE
•
MINIMUM TENSILE STRENGTH: 48000 POUNDS PER SQUARE INCH LBS
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
MATERIALSTEEL OVERALL
THREAD QUANTITY PER INCH11
HEAD DIAMETER1.313 INCHES NOMINAL IN
NECK LENGTH0.406 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATAC2 TYPE
MINIMUM TENSILE STRENGTH48000 POUNDS PER SQUARE INCH LBS
THREAD DIRECTIONRIGHT-HAND
NOMINAL THREAD DIAMETER0.625 INCHES IN
THREAD LENGTH1.750 INCHES MINIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
FFB571Upgraded Successor
successor cross-reference
successor
426204Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FFB571ANDTYPEC2?
FFB571ANDTYPEC2 is a BOLT,SQUARE NECK.
What parts can replace FFB571ANDTYPEC2?
There are 2 known substitutes for FFB571ANDTYPEC2: FFB571, 426204. Substitute compatibility should be verified for your specific system.
Is FFB571ANDTYPEC2 still available?
FFB571ANDTYPEC2 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