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PartsTable / COMPONENT / MIL-S-1222/QQ-S-763
MIL-S-1222/QQ-S-763 ✓ 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-S-1222/QQ-S-763 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 5310-01-038-0377, 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-S-1222/QQ-S-763
NSN: 5310-01-038-0377
FSC: 5310
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
Part NumberMIL-S-1222/QQ-S-763
NSN5310-01-038-0377
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MIL-S-1222/QQ-S-763 · 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 DIRECTION: RIGHT-HAND
•
WIDTH ACROSS FLATS: 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
•
THREAD CLASS: 2B
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OVERALL
•
DEPARTURE FROM CITED DOCUMENT: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
•
MATERIAL: STEEL COMP 304 OVERALL
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND B STYLE
•
NUT STYLE: HEXAGON
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND
WIDTH ACROSS FLATS0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
THREAD CLASS2B
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
DEPARTURE FROM CITED DOCUMENTMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
MATERIALSTEEL COMP 304 OVERALL
NONDEFINITIVE SPEC/STD DATA1 TYPE AND B STYLE
NUT STYLEHEXAGON
THREAD QUANTITY PER INCH13
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
MIL-S-1222G 1/2IN 13UNCInterchangeable
interchangeable cross-reference
interchangeable
MIL-S-1222GInterchangeable
interchangeable cross-reference
interchangeable
000.500-13UNC-2BInterchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222Interchangeable
interchangeable cross-reference
interchangeable
MIL-S-1222Interchangeable
interchangeable cross-reference
interchangeable
0.50013UNC2BT3G4NSA/BAInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-S-1222/QQ-S-763?
MIL-S-1222/QQ-S-763 is a MIL-S-1222/QQ-S-763.
What parts can replace MIL-S-1222/QQ-S-763?
There are 14 known substitutes for MIL-S-1222/QQ-S-763: MIL-S-1222G 1/2IN 13UNC, MIL-S-1222G, 000.500-13UNC-2B and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL-S-1222/QQ-S-763?
MIL-S-1222/QQ-S-763 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-038-0377. 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