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Technical Data Sheet
PartsTable / COMPONENT / MIL-DTL-1222TY3GR7,5/811UNC-2B
MIL-DTL-1222TY3GR7,5/811UNC-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 MIL-DTL-1222TY3GR7,5/811UNC-2B is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-383-3345, 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
MIL-DTL-1222TY3GR7,5/811UNC-2B
NSN: 5310-01-383-3345
FSC: 5310
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
Part NumberMIL-DTL-1222TY3GR7,5/811UNC-2B
NSN5310-01-383-3345
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MIL-DTL-1222TY3GR7,5/811UNC-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
•
THREAD QUANTITY PER INCH: 11
•
DEPARTURE FROM CITED DOCUMENT: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD SIZE: 0.626 INCHES IN
•
CRITICALITY CODE JUSTIFICATION: ZZZW
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS (FLIS)
THREAD QUANTITY PER INCH11
PART NAME ASSIGNED BY CONTROLLING AGENCYNUT,HEAVY,HEXAGON
DEPARTURE FROM CITED DOCUMENTMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD SIZE0.626 INCHES IN
CRITICALITY CODE JUSTIFICATIONZZZW
THREAD CLASS2B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
MIL-DTL-1222,TYIII,GR7,STYAL1Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222,TYIII,GR7,STYAInterchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222L1Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222,TYIII,GR 7 STYAL1Interchangeable
interchangeable cross-reference
interchangeable
1.00008UNC2BT3G7NSAFAL1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-DTL-1222TY3GR7,5/811UNC-2B?
MIL-DTL-1222TY3GR7,5/811UNC-2B is a MIL-DTL-1222TY3GR7,5/811UNC-2B.
What parts can replace MIL-DTL-1222TY3GR7,5/811UNC-2B?
There are 17 known substitutes for MIL-DTL-1222TY3GR7,5/811UNC-2B: MIL-DTL-1222,TYIII,GR7,STYAL1, MIL-DTL-1222,TYIII,GR7,STYA, MIL-DTL-1222L1 and 14 more. Substitute compatibility should be verified for your specific system.
Is MIL-DTL-1222TY3GR7,5/811UNC-2B still available?
MIL-DTL-1222TY3GR7,5/811UNC-2B 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