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PartsTable / COMPONENT / FFB571TYPEB2
FFB571TYPEB2 ✓ 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, nut_style: SQUARE, head_style: HEXAGON, nut_height: 0.310 INCHES MINIMUM AND 0.346 INCHES MAXIMUM IN, grip_length: 4.750 INCHES NOMINAL IN, head_height: 0.234 INCHES NOMINAL 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 5306-00-141-2929, 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
FFB571TYPEB2
NSN: 5306-00-141-2929
FSC: 5306
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleSQUARE
head_styleHEXAGON
nut_height0.310 INCHES MINIMUM AND 0.346 INCHES MAXIMUM IN
grip_length4.750 INCHES NOMINAL IN
head_height0.234 INCHES NOMINAL IN
thread_class2A A
thread_length1.000 INCHES MINIMUM IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
fastener_length1.250 INCHES NOMINAL IN
special_featuresFURNISHED WITH HEX NUT
thread_directionRIGHT-HAND
NSN5306-00-141-2929
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: FFB571TYPEB2 · 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
•
FASTENER LENGTH: 0.500 INCHES NOMINAL IN
•
WIDTH BETWEEN FLATS: 0.363 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
•
MINIMUM TENSILE STRENGTH: 68000 POUNDS PER SQUARE INCH LBS
•
THREAD LENGTH: 0.500 INCHES MAXIMUM IN
•
HEAD STYLE: HEXAGON
•
MATERIAL: STEEL OVERALL
•
THREAD QUANTITY PER INCH: 20
•
MATERIAL DOCUMENT AND CLASSIFICATION: FF-B-571 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH0.500 INCHES NOMINAL IN
WIDTH BETWEEN FLATS0.363 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
MINIMUM TENSILE STRENGTH68000 POUNDS PER SQUARE INCH LBS
THREAD LENGTH0.500 INCHES MAXIMUM IN
HEAD STYLEHEXAGON
MATERIALSTEEL OVERALL
THREAD QUANTITY PER INCH20
MATERIAL DOCUMENT AND CLASSIFICATIONFF-B-571 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
THREAD CLASS2A A
NONDEFINITIVE SPEC/STD DATAB2 TYPE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
FFB571TYPEB2Interchangeable
interchangeable cross-reference
interchangeable
JHP13-187Interchangeable
interchangeable cross-reference
interchangeable
92766Interchangeable
interchangeable cross-reference
interchangeable
50-2L3Interchangeable
interchangeable cross-reference
interchangeable
M491Interchangeable
interchangeable cross-reference
interchangeable
122138Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FFB571TYPEB2?
FFB571TYPEB2 is a BOLT,MACHINE.
What parts can replace FFB571TYPEB2?
There are 7 known substitutes for FFB571TYPEB2: FFB571TYPEB2, JHP13-187, 92766 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FFB571TYPEB2?
FFB571TYPEB2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-141-2929. 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