PartsTable
Technical Data Sheet
PartsTable / COMPONENT / FF-B-575C
FF-B-575C ✓ 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, head_height: 0.312 INCHES NOMINAL IN, thread_class: 2A A, thread_length: 1.250 INCHES MINIMUM IN, fastener_length: 2.000 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-151-3469, 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
FF-B-575C
NSN: 5306-00-151-3469
FSC: 5306
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleHEXAGON
head_height0.312 INCHES NOMINAL IN
thread_class2A A
thread_length1.250 INCHES MINIMUM IN
fastener_length2.000 INCHES NOMINAL IN
hardness_rating95.0 ROCKWELL B NOMINAL OVERALL
special_featuresFURNISHED WITH SQUARE NUT
thread_directionRIGHT-HAND
features_providedFINISHED HEAD
surface_treatmentCADMIUM AND CHROMATE OVERALL
width_between_flats0.750 INCHES NOMINAL IN
NSN5306-00-151-3469
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: FF-B-575C · 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
•
MINIMUM TENSILE STRENGTH: 48000 POUNDS PER SQUARE INCH LBS
•
THREAD CLASS: 2A A
•
HEAD HEIGHT: 0.172 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
WIDTH BETWEEN FLATS: 0.375 INCHES NOMINAL IN
•
FASTENER LENGTH: 2.500 INCHES NOMINAL IN
•
THREAD LENGTH: 0.750 INCHES MINIMUM IN
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
MINIMUM TENSILE STRENGTH48000 POUNDS PER SQUARE INCH LBS
THREAD CLASS2A A
HEAD HEIGHT0.172 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.250 INCHES IN
WIDTH BETWEEN FLATS0.375 INCHES NOMINAL IN
FASTENER LENGTH2.500 INCHES NOMINAL IN
THREAD LENGTH0.750 INCHES MINIMUM IN
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
THREAD QUANTITY PER INCH20
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
FF-B-575CUpgraded Successor
successor cross-reference
successor
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
MILB857TYPEACLASSCUpgraded Successor
successor cross-reference
successor
65424Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FF-B-575C?
FF-B-575C is a BOLT,MACHINE.
What parts can replace FF-B-575C?
There are 10 known substitutes for FF-B-575C: FF-B-575C, FF-B-575 TYPE II GRADE 1, FFB571ANDCLASSC and 7 more. Substitute compatibility should be verified for your specific system.
Is FF-B-575C still available?
FF-B-575C 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