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PartsTable / COMPONENT / OO-K-220 TY2ST1GRA
OO-K-220 TY2ST1GRA ✓ 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 KEY,MACHINE is a the manufacturer industrial component. Key specifications include overall_width: 0.1875 INCHES MINIMUM AND 0.1885 INCHES MAXIMUM IN, overall_height: 0.1875 INCHES MINIMUM AND 0.1885 INCHES MAXIMUM IN, overall_length: 1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN, style_designator: PLAIN, surface_treatment: PASSIVATE OVERALL, starting_edge_shape: STRAIGHT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-917-7838, 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
OO-K-220 TY2ST1GRA
NSN: 5315-00-917-7838
FSC: 5315
CAGE: 80244 — GENERAL SERVICES ADMINISTRATION FEDERAL SUPPLY SERVICE (USA)
SPECIFICATIONS
overall_width0.1875 INCHES MINIMUM AND 0.1885 INCHES MAXIMUM IN
overall_height0.1875 INCHES MINIMUM AND 0.1885 INCHES MAXIMUM IN
overall_length1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN
style_designatorPLAIN
surface_treatmentPASSIVATE OVERALL
starting_edge_shapeSTRAIGHT
nondefinitive_spec/std_data2 TYPE OR 1 STYLE OR A GRADE
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5315-00-917-7838
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: OO-K-220 TY2ST1GRA · 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
•
NONDEFINITIVE SPEC/STD DATA: 2 TYPE OR 1 STYLE OR A GRADE
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL: STEEL COMP 403 OR STEEL COMP 405 OR STEEL COMP 410 OR STEEL COMP 414 OR STEEL COMP 416 OR STEEL COMP 416SE OR STEEL COMP 420 OR STEEL COMP 430 OR STEEL COMP 430F OR STEEL COMP 430FSE OR STEEL COMP 440A OR STEEL COMP 440B OR STEEL COMP 440C OR STEEL COMP 442 OR STEEL COMP 446 OVERALL A
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
STYLE DESIGNATOR: PLAIN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH0.1875 INCHES MINIMUM AND 0.1885 INCHES MAXIMUM IN
NONDEFINITIVE SPEC/STD DATA2 TYPE OR 1 STYLE OR A GRADE
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL COMP 403 OR STEEL COMP 405 OR STEEL COMP 410 OR STEEL COMP 414 OR STEEL COMP 416 OR STEEL COMP 416SE OR STEEL COMP 420 OR STEEL COMP 430 OR STEEL COMP 430F OR STEEL COMP 430FSE OR STEEL COMP 440A OR STEEL COMP 440B OR STEEL COMP 440C OR STEEL COMP 442 OR STEEL COMP 446 OVERALL A
OVERALL LENGTH1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
STYLE DESIGNATORPLAIN
STARTING EDGE SHAPESTRAIGHT
OVERALL HEIGHT0.1875 INCHES MINIMUM AND 0.1885 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
00K220Interchangeable
interchangeable cross-reference
interchangeable
MS20066-2Interchangeable
interchangeable cross-reference
interchangeable
MS20066-544Interchangeable
interchangeable cross-reference
interchangeable
NASM20066Interchangeable
interchangeable cross-reference
interchangeable
55-22081 PART 2Interchangeable
interchangeable cross-reference
interchangeable
MB423Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is OO-K-220 TY2ST1GRA?
OO-K-220 TY2ST1GRA is a KEY,MACHINE.
What parts can replace OO-K-220 TY2ST1GRA?
There are 13 known substitutes for OO-K-220 TY2ST1GRA: 00K220, MS20066-2, MS20066-544 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for OO-K-220 TY2ST1GRA?
OO-K-220 TY2ST1GRA is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-917-7838. 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