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PartsTable / COMPONENT / ANSI B18.2.2
ANSI B18.2.2 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The ANSI B18.2.2 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-639-1054, 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 B18.2.2
NSN: 5310-00-639-1054
FSC: 5310
CAGE: 80204 — AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED DBA AMERICAN NATIONAL STANDARDS INSTITUTE (USA)
SPECIFICATIONS
Part NumberANSI B18.2.2
NSN5310-00-639-1054
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: ANSI B18.2.2 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 4 STYLE AND 2B CLASS
•
NUT STYLE: HEXAGON
•
THREAD QUANTITY PER INCH: 16
•
WIDTH ACROSS FLATS: 1.088 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
•
THREAD SERIES: UNF
•
NOMINAL THREAD SIZE: 0.750 INCHES IN
•
BEARING SURFACE TYPE: CHAMFERED OR WASHER FACED
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 4 STYLE AND 2B CLASS
NUT STYLEHEXAGON
THREAD QUANTITY PER INCH16
WIDTH ACROSS FLATS1.088 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN
THREAD SERIESUNF
END ITEM IDENTIFICATIONMRAP BUFFALO MK2A2
NOMINAL THREAD SIZE0.750 INCHES IN
BEARING SURFACE TYPECHAMFERED OR WASHER FACED
MATERIALSTEEL OVERALL
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
16A4C2Interchangeable
interchangeable cross-reference
interchangeable
012316-8Interchangeable
interchangeable cross-reference
interchangeable
FFS836Interchangeable
interchangeable cross-reference
interchangeable
M1222N3X6C20GFNNInterchangeable
interchangeable cross-reference
interchangeable
M122N3X6C20CFNNInterchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ANSI B18.2.2?
ANSI B18.2.2 is a ANSI B18.2.2.
What parts can replace ANSI B18.2.2?
There are 15 known substitutes for ANSI B18.2.2: 16A4C2, 012316-8, FFS836 and 12 more. Substitute compatibility should be verified for your specific system.
Is ANSI B18.2.2 still available?
ANSI B18.2.2 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