PartsTable
Technical Data Sheet
PartsTable / COMPONENT / ANSI B18.6.3
ANSI B18.6.3 ✓ 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 ANSI B18.6.3 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-059-8256, 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
ANSI B18.6.3
NSN: 5305-00-059-8256
FSC: 5305
CAGE: 80204 — AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED DBA AMERICAN NATIONAL STANDARDS INSTITUTE (USA)
SPECIFICATIONS
Part NumberANSI B18.6.3
NSN5305-00-059-8256
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ANSI B18.6.3 · 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
•
THREAD LENGTH: 0.938 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
•
SCREW MATERIAL: COPPER ALLOY
•
THREAD CLASS: 2A A
•
HEAD DIAMETER: 0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
•
HEAD HEIGHT: 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
MINIMUM TENSILE STRENGTH: 55000 POUNDS PER SQUARE INCH LBS
•
NOMINAL THREAD DIAMETER: 0.138 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD LENGTH0.938 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN
SCREW MATERIALCOPPER ALLOY
THREAD CLASS2A A
HEAD DIAMETER0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN
HEAD HEIGHT0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
MINIMUM TENSILE STRENGTH55000 POUNDS PER SQUARE INCH LBS
NOMINAL THREAD DIAMETER0.138 INCHES IN
THREAD QUANTITY PER INCH32
FASTENER LENGTH1.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
5305PL2228214Interchangeable
interchangeable cross-reference
interchangeable
ANSI B18.6.3Interchangeable
interchangeable cross-reference
interchangeable
FF-S-92Interchangeable
interchangeable cross-reference
interchangeable
706Interchangeable
interchangeable cross-reference
interchangeable
A-A-1044Interchangeable
interchangeable cross-reference
interchangeable
A-A-1044 TY1CL3FMAInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
Ready to buy ANSI B18.6.3?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is ANSI B18.6.3?
ANSI B18.6.3 is a ANSI B18.6.3.
What parts can replace ANSI B18.6.3?
There are 25 known substitutes for ANSI B18.6.3: 5305PL2228214, ANSI B18.6.3, FF-S-92 and 22 more. Substitute compatibility should be verified for your specific system.
Is ANSI B18.6.3 still available?
ANSI B18.6.3 is currently cancelled.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — ANSI B18.6.3

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026