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Technical Data Sheet
PartsTable / COMPONENT / AMSE B18.6.4
AMSE B18.6.4 ✓ 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 AMSE B18.6.4 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5305-00-432-4172, 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
AMSE B18.6.4
NSN: 5305-00-432-4172
FSC: 5305
CAGE: 05047 — THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS (USA)
SPECIFICATIONS
Part NumberAMSE B18.6.4
NSN5305-00-432-4172
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AMSE B18.6.4 · 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
•
HEAD DIAMETER: 0.306 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B633 ASSN STD 1ST TREATMENT RESPONSE OVERALL
•
HEAD STYLE: PAN
•
NONDEFINITIVE SPEC/STD DATA: AB TYPE
•
SURFACE TREATMENT: ZINC OVERALL
•
MATERIAL: STEEL OVERALL
•
FASTENER LENGTH: 0.719 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
HEAD DIAMETER0.306 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B633 ASSN STD 1ST TREATMENT RESPONSE OVERALL
HEAD STYLEPAN
NONDEFINITIVE SPEC/STD DATAAB TYPE
SURFACE TREATMENTZINC OVERALL
MATERIALSTEEL OVERALL
FASTENER LENGTH0.719 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN
HEAD HEIGHT0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN
NONMACHINE THREAD STYLEGIMLET POINT (TYPE A, AB OR BA)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
AMSE-B18.6.4Interchangeable
interchangeable cross-reference
interchangeable
FF-S-107 TYAInterchangeable
interchangeable cross-reference
interchangeable
ANSI B18.6.4Interchangeable
interchangeable cross-reference
interchangeable
MS24617-46Interchangeable
interchangeable cross-reference
interchangeable
80096Interchangeable
interchangeable cross-reference
interchangeable
FF-S-107 TYABST PAN RECESSEDInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AMSE B18.6.4?
AMSE B18.6.4 is a AMSE B18.6.4.
What parts can replace AMSE B18.6.4?
There are 30 known substitutes for AMSE B18.6.4: AMSE-B18.6.4, FF-S-107 TYA, ANSI B18.6.4 and 27 more. Substitute compatibility should be verified for your specific system.
Is AMSE B18.6.4 still available?
AMSE B18.6.4 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026