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PartsTable / COMPONENT / MIL-S-1222G 1-1/8IN 8UN
MIL-S-1222G 1-1/8IN 8UN ✓ 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-1222G 1-1/8IN 8UN is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-01-111-5212, 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-1222G 1-1/8IN 8UN
NSN: 5310-01-111-5212
FSC: 5310
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
Part NumberMIL-S-1222G 1-1/8IN 8UN
NSN5310-01-111-5212
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: MIL-S-1222G 1-1/8IN 8UN · 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
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
•
CRITICALITY CODE JUSTIFICATION: ZZZY
TECHNICAL CHARACTERISTICS (FLIS)
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
CRITICALITY CODE JUSTIFICATIONZZZY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
MIL-B-857AInterchangeable
interchangeable cross-reference
interchangeable
001.125-08UNC-2BInterchangeable
interchangeable cross-reference
interchangeable
MIL-S-1222GInterchangeable
interchangeable cross-reference
interchangeable
MIL-S-1222G 1-1/8IN 8UNInterchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-1222Interchangeable
Same NIIN cross-reference
interchangeable
MIL-S-1222Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-S-1222G 1-1/8IN 8UN?
MIL-S-1222G 1-1/8IN 8UN is a MIL-S-1222G 1-1/8IN 8UN.
What parts can replace MIL-S-1222G 1-1/8IN 8UN?
There are 6 known substitutes for MIL-S-1222G 1-1/8IN 8UN: MIL-B-857A, 001.125-08UNC-2B, MIL-S-1222G and 3 more. Substitute compatibility should be verified for your specific system.
Is MIL-S-1222G 1-1/8IN 8UN still available?
MIL-S-1222G 1-1/8IN 8UN 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