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PartsTable / COMPONENT / FFB571ANDCLASSA
FFB571ANDCLASSA ✓ 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 SCREW,CAP,HEXAGON HEAD is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: HEXAGON, grip_length: 1.125 INCHES NOMINAL IN, head_height: 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.750 INCHES MINIMUM AND 0.938 INCHES MAXIMUM 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 5306-00-151-3456, 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
FFB571ANDCLASSA
NSN: 5306-00-151-3456
FSC: 5306
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
grip_length1.125 INCHES NOMINAL IN
head_height0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN
thread_class2A A
thread_length0.750 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN
fastener_length1.500 INCHES NOMINAL IN
hardness_rating32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentZINC AND CHROMATE OVERALL
width_between_flats0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN
NSN5306-00-151-3456
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: FFB571ANDCLASSA · 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
•
HEAD STYLE: HEXAGON
•
THREAD SERIES DESIGNATOR: UNF
•
MINIMUM TENSILE STRENGTH: 48000 POUNDS PER SQUARE INCH LBS
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
HEAD HEIGHT: 0.172 INCHES NOMINAL IN
•
THREAD DIRECTION: RIGHT-HAND
•
FEATURES PROVIDED: FINISHED HEAD
•
THREAD CLASS: 2A A
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLEHEXAGON
THREAD SERIES DESIGNATORUNF
MINIMUM TENSILE STRENGTH48000 POUNDS PER SQUARE INCH LBS
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
HEAD HEIGHT0.172 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
FEATURES PROVIDEDFINISHED HEAD
THREAD CLASS2A A
WIDTH BETWEEN FLATS0.375 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
60426Interchangeable
interchangeable cross-reference
interchangeable
60-4-20Interchangeable
interchangeable cross-reference
interchangeable
FFB571ANDCLASSAInterchangeable
interchangeable cross-reference
interchangeable
60-4-12Interchangeable
interchangeable cross-reference
interchangeable
MS90727-12Interchangeable
interchangeable cross-reference
interchangeable
B1821BH025F150Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FFB571ANDCLASSA?
FFB571ANDCLASSA is a SCREW,CAP,HEXAGON HEAD.
What parts can replace FFB571ANDCLASSA?
There are 10 known substitutes for FFB571ANDCLASSA: 60426, 60-4-20, FFB571ANDCLASSA and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FFB571ANDCLASSA?
FFB571ANDCLASSA is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-151-3456. 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