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PartsTable / COMPONENT / ANSI B18.3.5M
ANSI B18.3.5M ✓ 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 B18.3.5M is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-494-7315, 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 B18.3.5M
NSN: 5305-01-494-7315
FSC: 5305
CAGE: 80204 — AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED DBA AMERICAN NATIONAL STANDARDS INSTITUTE (USA)
SPECIFICATIONS
Part NumberANSI B18.3.5M
NSN5305-01-494-7315
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: ANSI B18.3.5M · 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 DIRECTION: RIGHT-HAND
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B633,TY 2 FED STD SINGLE TREATMENT RESPONSE OVERALL
•
SURFACE TREATMENT: ZINC AND CHROMATE OVERALL
•
THREAD SERIES DESIGNATOR: M
•
THREAD LENGTH: 20.0 MILLIMETERS NOMINAL MM
•
NOMINAL THREAD DIAMETER: 5.0 MILLIMETERS MM
•
THREAD PITCH IN MILLIMETERS: 0.8
•
HEAD DIAMETER: 9.75 MILLIMETERS MINIMUM AND 11.20 MILLIMETERS MAXIMUM MM
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633,TY 2 FED STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTZINC AND CHROMATE OVERALL
THREAD SERIES DESIGNATORM
THREAD LENGTH20.0 MILLIMETERS NOMINAL MM
NOMINAL THREAD DIAMETER5.0 MILLIMETERS MM
THREAD PITCH IN MILLIMETERS0.8
HEAD DIAMETER9.75 MILLIMETERS MINIMUM AND 11.20 MILLIMETERS MAXIMUM MM
HEAD STYLEFLAT COUNTERSUNK
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
4L420-4Interchangeable
interchangeable cross-reference
interchangeable
4L420Interchangeable
interchangeable cross-reference
interchangeable
24204Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ANSI B18.3.5M?
ANSI B18.3.5M is a ANSI B18.3.5M.
What parts can replace ANSI B18.3.5M?
There are 3 known substitutes for ANSI B18.3.5M: 4L420-4, 4L420, 24204. Substitute compatibility should be verified for your specific system.
What is the NSN for ANSI B18.3.5M?
ANSI B18.3.5M is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-01-494-7315. 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