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Technical Data Sheet
PartsTable / COMPONENT / AMSE-B18.2.1
AMSE-B18.2.1 ✓ 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-B18.2.1 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5306-00-527-4956, 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-B18.2.1
NSN: 5306-00-527-4956
FSC: 5306
CAGE: 05047 — THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS (USA)
SPECIFICATIONS
Part NumberAMSE-B18.2.1
NSN5306-00-527-4956
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: AMSE-B18.2.1 · 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 STYLE: SQUARE
•
THREAD CLASS: 2A A
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: SAE/AMS QQ-P-416 TY2CL3 FED SPEC 1ST TREATMENT RESPONSE OR ASTM 633 FED SPEC 2ND TREATMENT RESPONSE OVERALL
•
MATERIAL: STEEL OVERALL
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
SURFACE TREATMENT: CADMIUM OR ZINC OVERALL
•
MINIMUM TENSILE STRENGTH: 55000 POUNDS PER SQUARE INCH LBS
TECHNICAL CHARACTERISTICS (FLIS)
HEAD STYLESQUARE
THREAD CLASS2A A
NONDEFINITIVE SPEC/STD DATA1 TYPE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONSAE/AMS QQ-P-416 TY2CL3 FED SPEC 1ST TREATMENT RESPONSE OR ASTM 633 FED SPEC 2ND TREATMENT RESPONSE OVERALL
MATERIALSTEEL OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
SURFACE TREATMENTCADMIUM OR ZINC OVERALL
MINIMUM TENSILE STRENGTH55000 POUNDS PER SQUARE INCH LBS
MATERIAL DOCUMENT AND CLASSIFICATIONSAE GR 1 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
HEAD HEIGHT0.400 INCHES MINIMUM AND 0.444 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
111195Upgraded Successor
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FF-B-575Upgraded Successor
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V80AUpgraded Successor
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1103024Upgraded Successor
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0904935-4Upgraded Successor
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MS35355-127Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AMSE-B18.2.1?
AMSE-B18.2.1 is a AMSE-B18.2.1.
What parts can replace AMSE-B18.2.1?
There are 24 known substitutes for AMSE-B18.2.1: 111195, FF-B-575, V80A and 21 more. Substitute compatibility should be verified for your specific system.
Is AMSE-B18.2.1 still available?
AMSE-B18.2.1 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