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Technical Data Sheet
PartsTable / COMPONENT / MIL-DTL-1222,TYIII,GR 7,STY AL1
MIL-DTL-1222,TYIII,GR 7,STY AL1 ✓ 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-1222,TYIII,GR 7,STY AL1 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 5310-01-383-3251, 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-1222,TYIII,GR 7,STY AL1
NSN: 5310-01-383-3251
FSC: 5310
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
Part NumberMIL-DTL-1222,TYIII,GR 7,STY AL1
NSN5310-01-383-3251
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MIL-DTL-1222,TYIII,GR 7,STY AL1 · 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
•
DEPARTURE FROM CITED DOCUMENT: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
•
NOMINAL THREAD SIZE: 0.750 INCHES IN
•
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
•
CRITICALITY CODE JUSTIFICATION: ZZZW
•
THREAD QUANTITY PER INCH: 10
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS (FLIS)
DEPARTURE FROM CITED DOCUMENTMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS
NOMINAL THREAD SIZE0.750 INCHES IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
CRITICALITY CODE JUSTIFICATIONZZZW
THREAD QUANTITY PER INCH10
THREAD CLASS2B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
MIL-DTL-1222,TYIII,GR7,STYAL1Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222,TYIII,GR7,STYAInterchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222Interchangeable
interchangeable cross-reference
interchangeable
MIL-STD-1222,TYIII,GR7,STYAInterchangeable
interchangeable cross-reference
interchangeable
29307NPC15Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222L1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-DTL-1222,TYIII,GR 7,STY AL1?
MIL-DTL-1222,TYIII,GR 7,STY AL1 is a MIL-DTL-1222,TYIII,GR 7,STY AL1.
What parts can replace MIL-DTL-1222,TYIII,GR 7,STY AL1?
There are 13 known substitutes for MIL-DTL-1222,TYIII,GR 7,STY AL1: MIL-DTL-1222,TYIII,GR7,STYAL1, MIL-DTL-1222,TYIII,GR7,STYA, MIL-DTL-1222 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-DTL-1222,TYIII,GR 7,STY AL1?
MIL-DTL-1222,TYIII,GR 7,STY AL1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-383-3251. 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