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Technical Data Sheet
PartsTable / COMPONENT / 3/8-11UNC-2B
3/8-11UNC-2B ✓ 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 3/8-11UNC-2B 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 5310-01-244-7567, 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
3/8-11UNC-2B
NSN: 5310-01-244-7567
FSC: 5310
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
Part Number3/8-11UNC-2B
NSN5310-01-244-7567
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 3/8-11UNC-2B · 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
•
NOMINAL THREAD SIZE: 0.375 INCHES IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
THREAD QUANTITY PER INCH: 16
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
BEARING SURFACE TYPE: FLAT OR WASHER FACED
•
NUT STYLE: HEXAGON
•
THREAD CLASS: 2B
•
NUT HEIGHT: 0.320 INCHES MINIMUM AND 0.337 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE0.375 INCHES IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH16
CRITICALITY CODE JUSTIFICATIONZZZY
BEARING SURFACE TYPEFLAT OR WASHER FACED
NUT STYLEHEXAGON
THREAD CLASS2B
NUT HEIGHT0.320 INCHES MINIMUM AND 0.337 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
SURFACE TREATMENTZINC OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
MIL-S-1222G TY1Interchangeable
interchangeable cross-reference
interchangeable
3/4-10UNC-2AX2-1/2 LGInterchangeable
interchangeable cross-reference
interchangeable
501-4364087ITEM3Interchangeable
interchangeable cross-reference
interchangeable
216-4363288MT-F44Interchangeable
interchangeable cross-reference
interchangeable
1/2-13UNC-2BInterchangeable
interchangeable cross-reference
interchangeable
216-4363322 F34-6Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3/8-11UNC-2B?
3/8-11UNC-2B is a 3/8-11UNC-2B.
What parts can replace 3/8-11UNC-2B?
There are 27 known substitutes for 3/8-11UNC-2B: MIL-S-1222G TY1, 3/4-10UNC-2AX2-1/2 LG, 501-4364087ITEM3 and 24 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3/8-11UNC-2B?
3/8-11UNC-2B is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-244-7567. 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