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OO-K-220 — KEY,MACHINE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

OO-K-220: KEY,MACHINE.

The KEY,MACHINE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, overall_width: 0.625 INCHES MINIMUM AND 0.626 INCHES MAXIMUM IN, overall_height: 0.625 INCHES MINIMUM AND 0.626 INCHES MAXIMUM IN, overall_length: 3.000 INCHES NOMINAL IN, shear_strength: 60000 SINGLE POUNDS PER SQUARE INCH, hardness_rating: 40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-051-6105, 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
NSN: 5315-00-051-6105
NIINs: 000516105, 000516610, 000626839, 000816414, 002564826, 002643099, 002989161, 006164249, 006821811, 007207038, 007262470, 007262484, 007296988, 007296991, 007296992, 007296993, 007296994, 007298570, 007298575, 007298766, 007304448, 007304451, 007304453, 007304454, 007304455, 007304456, 007304466, 007304564, 007304713, 007320589, 007320594, 007321003, 007321006, 007322837, 007322839, 007322841, 007613703, 007811994, 007812035, 007814529, 008005440, 008104761, 008159499, 008438587, 008557331, 008995273, 009004601, 009177838, 009577089, 009902973, 010215724, 010264522, 010326625, 010332829, 010412167, 010735859, 010810249, 010833371, 010866565, 010871322, 010928862, 010953475, 010983923, 011104790, 011126256, 011126257, 011140028, 011143906, 011145368, 011188930, 011190591, 011195239, 011320268, 011345942, 011361859, 011363601, 011364541, 011382730, 011391493, 011441068, 011441069, 011450877, 011599430, 011651459, 011695670, 011996301, 011996302, 012016929, 012016930, 012086883, 012134417, 012229228, 012277807, 012364465, 012408199, 012411630, 012416619, 012464000, 012549256, 012549257, 012638321, 012728388, 012736919, 012829998, 012867280, 012867282, 012881603, 012935477, 013048832, 013424722, 013531534, 013955127, 014376669
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 81348 — FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_width0.625 INCHES MINIMUM AND 0.626 INCHES MAXIMUM IN
overall_height0.625 INCHES MINIMUM AND 0.626 INCHES MAXIMUM IN
overall_length3.000 INCHES NOMINAL IN
shear_strength60000 SINGLE POUNDS PER SQUARE INCH
hardness_rating40.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
style_designatorPLAIN
surface_treatmentPASSIVATE OVERALL
starting_edge_shapeROUNDROUND
starting_edge_radius0.062 INCHES NOMINAL0.062 INCHES NOMINAL IN
nondefinitive_spec/std_data2 TYPE AND 2 TYPE AND 2 STYLE AND 2 STYLE AND B GRADEB GRADE
specification/standard_data96906-MS20066 GOVERNMENT STANDARD
NSN5315-00-051-6105
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: OO-K-220 · 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
STARTING EDGE SHAPE: STRAIGHT
•
STYLE DESIGNATOR: PLAIN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
NONDEFINITIVE SPEC/STD DATA: 2 TYPE AND 1 STYLE AND A GRADE
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.125 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
STARTING EDGE SHAPESTRAIGHT
STYLE DESIGNATORPLAIN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
OVERALL LENGTH0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN
OVERALL WIDTH0.125 INCHES MINIMUM AND 0.126 INCHES MAXIMUM IN
NONDEFINITIVE SPEC/STD DATA2 TYPE AND 1 STYLE AND A GRADE
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL COMP 403 OR STEEL COMP 405 OR STEEL COMP 410 OR STEEL COMP 446 OR STEEL COMP 414 OR STEEL COMP 416SE OR STEEL COMP 416 OR STEEL COMP 420 OR STEEL COMP 430 OR STEEL COMP 430F OR STEEL COMP 430FSE OR STEEL COMP 431 OR STEEL COMP 440A OR STEEL COMP 440B OR STEEL COMP 440C OR STEEL COMP 442 OVERALL A
OTHER ITEMS IN FSC 5315 — Nails, Machine Keys, and Pins
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5315-00-000-1037 5315-00-000-1067 5315-00-000-1245 5315-00-000-1372 5315-00-000-1412 5315-00-001-1571 5315-00-001-1572 5315-00-001-1602
SUBSTITUTES & CROSS-REFERENCES 1
MS20066-74Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is OO-K-220?
OO-K-220 is a KEY,MACHINE.
What parts can replace OO-K-220?
There is 1 known substitute for OO-K-220: MS20066-74. Substitute compatibility should be verified for your specific system.
What is the NSN for OO-K-220?
OO-K-220 is cataloged in the U.S. Government catalog under NSN 5315-00-051-6105. This indicates validated use in U.S. government and defense supply chains.
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U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.