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Technical Data Sheet
PartsTable / COMPONENT / B18-2-2
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 HOSE ASSEMBLY,NONMETALLIC is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: HEXAGON, thickness: 2.00 MILLIMETERS MINIMUM AND 2.80 MILLIMETERS MAXIMUM MM, nut_height: 0.258 INCHES MINIMUM AND 0.273 INCHES MAXIMUM IN, thread_class: 2B, hole_diameter: 13.30 MILLIMETERS MINIMUM AND 13.57 MILLIMETERS MAXIMUM MM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-022-0081, 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
B18-2-2
NSN: 5310-00-022-0081
FSC: 5310
CAGE: 80204 — AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED DBA AMERICAN NATIONAL STANDARDS INSTITUTE (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_styleHEXAGON
thickness2.00 MILLIMETERS MINIMUM AND 2.80 MILLIMETERS MAXIMUM MM
nut_height0.258 INCHES MINIMUM AND 0.273 INCHES MAXIMUM IN
thread_class2B
hole_diameter13.30 MILLIMETERS MINIMUM AND 13.57 MILLIMETERS MAXIMUM MM
thread_seriesUNF
vacuum_in_torr101.6
hardness_rating95.0 ROCKWELL B MINIMUM AND 32.0 ROCKWELL C MAXIMUM
inside_diameter0.187 INCHES NOMINAL IN
connection_styleSWIVEL NUT FLARE FIRST END
outside_diameter0.484 INCHES NOMINAL IN
NSN5310-00-022-0081
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 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
•
NUT HEIGHT: 0.641 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 10
•
NOMINAL THREAD SIZE: 0.750 INCHES IN
•
BEARING SURFACE TYPE: WASHER FACED
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
MATERIAL: STEEL OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
SPECIFICATION/STANDARD DATA: 80204-B18-2-2-65 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
TECHNICAL CHARACTERISTICS (FLIS)
NUT HEIGHT0.641 INCHES NOMINAL IN
THREAD QUANTITY PER INCH10
NOMINAL THREAD SIZE0.750 INCHES IN
BEARING SURFACE TYPEWASHER FACED
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
MATERIALSTEEL OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-633-CANC FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SPECIFICATION/STANDARD DATA80204-B18-2-2-65 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
WIDTH ACROSS FLATS1.125 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
USAF325B16Interchangeable
interchangeable cross-reference
interchangeable
REGULARNUTInterchangeable
interchangeable cross-reference
interchangeable
20261 FIND 21Interchangeable
interchangeable cross-reference
interchangeable
64049Interchangeable
interchangeable cross-reference
interchangeable
1.5S1BInterchangeable
interchangeable cross-reference
interchangeable
B4CXInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B18-2-2?
B18-2-2 is a HOSE ASSEMBLY,NONMETALLIC.
What parts can replace B18-2-2?
There are 14 known substitutes for B18-2-2: USAF325B16, REGULARNUT, 20261 FIND 21 and 11 more. Substitute compatibility should be verified for your specific system.
Is B18-2-2 still available?
B18-2-2 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: July 2026