PartsTable
Technical Data Sheet
PartsTable / COMPONENT / 51224B
51224B ✓ 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 THUMBSCREW is a the manufacturer industrial component. Key specifications include head_height: 0.359 INCHES NOMINAL IN, point_style: DOG, point_length: 0.094 INCHES NOMINAL IN, head_diameter: 0.490 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN, thread_length: 0.218 INCHES NOMINAL IN, point_diameter: 0.100 INCHES MINIMUM AND 0.105 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 5305-00-359-8869, 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
51224B
NSN: 5305-00-359-8869
FSC: 5305
CAGE: 77948 — SINGER CO THE (USA)
SPECIFICATIONS
head_height0.359 INCHES NOMINAL IN
point_styleDOG
point_length0.094 INCHES NOMINAL IN
head_diameter0.490 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
thread_length0.218 INCHES NOMINAL IN
point_diameter0.100 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN
fastener_length0.312 INCHES NOMINAL IN
NSN5305-00-359-8869
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 51224B · 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
•
POINT DIAMETER: 0.100 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN
•
POINT LENGTH: 0.094 INCHES NOMINAL IN
•
THREAD LENGTH: 0.218 INCHES NOMINAL IN
•
HEAD HEIGHT: 0.359 INCHES NOMINAL IN
•
HEAD DIAMETER: 0.490 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
•
POINT STYLE: DOG
•
FASTENER LENGTH: 0.312 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
POINT DIAMETER0.100 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN
POINT LENGTH0.094 INCHES NOMINAL IN
THREAD LENGTH0.218 INCHES NOMINAL IN
HEAD HEIGHT0.359 INCHES NOMINAL IN
HEAD DIAMETER0.490 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN
POINT STYLEDOG
FASTENER LENGTH0.312 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
B5-45-3115Interchangeable
interchangeable cross-reference
interchangeable
A1688Interchangeable
interchangeable cross-reference
interchangeable
740-04-004Interchangeable
interchangeable cross-reference
interchangeable
51224Interchangeable
interchangeable cross-reference
interchangeable
12810Interchangeable
interchangeable cross-reference
interchangeable
504004Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 51224B?
51224B is a THUMBSCREW.
What parts can replace 51224B?
There are 10 known substitutes for 51224B: B5-45-3115, A1688, 740-04-004 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 51224B?
51224B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-359-8869. 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