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PartsTable / COMPONENT / FFB561ANDTYPE1ANDGRADEC
FFB561ANDTYPE1ANDGRADEC ✓ 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,LAG is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, head_style: SQUARE, head_height: 0.250 INCHES NOMINAL IN, fastener_length: 2.000 INCHES NOMINAL IN, width_between_flats: 0.562 INCHES NOMINAL IN, nonmachine_thread_style: FETTER DRIVE (TYPE DR). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-282-8991, 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
FFB561ANDTYPE1ANDGRADEC
NSN: 5305-00-282-8991
FSC: 5305
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
head_styleSQUARE
head_height0.250 INCHES NOMINAL IN
fastener_length2.000 INCHES NOMINAL IN
width_between_flats0.562 INCHES NOMINAL IN
nonmachine_thread_styleFETTER DRIVE (TYPE DR)
NSN5305-00-282-8991
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: FFB561ANDTYPE1ANDGRADEC · 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: 2.000 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.250 INCHES NOMINAL IN
•
HEAD STYLE: SQUARE
•
MATERIAL: STEEL OVERALL
•
WIDTH BETWEEN FLATS: 0.562 INCHES NOMINAL IN
•
NONMACHINE THREAD STYLE: FETTER DRIVE (TYPE DR)
TECHNICAL CHARACTERISTICS (FLIS)
FASTENER LENGTH2.000 INCHES NOMINAL IN
HEAD HEIGHT0.250 INCHES NOMINAL IN
HEAD STYLESQUARE
MATERIALSTEEL OVERALL
WIDTH BETWEEN FLATS0.562 INCHES NOMINAL IN
NONMACHINE THREAD STYLEFETTER DRIVE (TYPE DR)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
54064Interchangeable
interchangeable cross-reference
interchangeable
XM-36460-120-0360-O-LInterchangeable
interchangeable cross-reference
interchangeable
SS20829BInterchangeable
interchangeable cross-reference
interchangeable
B-3353Interchangeable
interchangeable cross-reference
interchangeable
Y00016611Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is FFB561ANDTYPE1ANDGRADEC?
FFB561ANDTYPE1ANDGRADEC is a SCREW,LAG.
What parts can replace FFB561ANDTYPE1ANDGRADEC?
There are 5 known substitutes for FFB561ANDTYPE1ANDGRADEC: 54064, XM-36460-120-0360-O-L, SS20829B and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for FFB561ANDTYPE1ANDGRADEC?
FFB561ANDTYPE1ANDGRADEC is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-282-8991. 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