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PartsTable / COMPONENT / FFB571ANDCLASSC
FFB571ANDCLASSC ✓ 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,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, grip_length: 1.500 INCHES NOMINAL IN, head_height: 0.205 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 1.000 INCHES MINIMUM 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 5306-00-151-1905, 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
FFB571ANDCLASSC
NSN: 5306-00-151-1905
FSC: 5306
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
grip_length1.500 INCHES NOMINAL IN
head_height0.205 INCHES NOMINAL IN
thread_class2A A
thread_length1.000 INCHES MINIMUM IN
fastener_length2.500 INCHES NOMINAL IN
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentCADMIUM OR ZINC OVERALL
width_between_flats0.500 INCHES NOMINAL IN
nominal_thread_diameter0.312 INCHES IN
NSN5306-00-151-1905
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: FFB571ANDCLASSC · 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
•
NOMINAL THREAD DIAMETER: 0.625 INCHES IN
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
FEATURES PROVIDED: UNFINISHED HEAD
•
THREAD QUANTITY PER INCH: 18
•
THREAD CLASS: 2A A
•
HEAD STYLE: HEXAGON
•
HEAD HEIGHT: 0.413 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD DIAMETER0.625 INCHES IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
FEATURES PROVIDEDUNFINISHED HEAD
THREAD QUANTITY PER INCH18
THREAD CLASS2A A
HEAD STYLEHEXAGON
HEAD HEIGHT0.413 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
WIDTH BETWEEN FLATS0.938 INCHES NOMINAL IN
MINIMUM TENSILE STRENGTH48000 POUNDS PER SQUARE INCH LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
FF-B-575 TYPE II GRADE 1Upgraded Successor
successor cross-reference
successor
FFB571ANDCLASSCUpgraded Successor
successor cross-reference
successor
65-10-64Upgraded Successor
successor cross-reference
successor
849093Interchangeable
interchangeable cross-reference
interchangeable
MK 777-20Interchangeable
interchangeable cross-reference
interchangeable
633-19372Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FFB571ANDCLASSC?
FFB571ANDCLASSC is a BOLT,MACHINE.
What parts can replace FFB571ANDCLASSC?
There are 8 known substitutes for FFB571ANDCLASSC: FF-B-575 TYPE II GRADE 1, FFB571ANDCLASSC, 65-10-64 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FFB571ANDCLASSC?
FFB571ANDCLASSC is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-151-1905. 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