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Technical Data Sheet
PartsTable / COMPONENT / 5190405
5190405 ✓ 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 WEDGE,COLLAR is a the manufacturer industrial component. Key specifications include end_item_identification: CLOSE-IN WEAPON SYS MK15 MOD II, general_characteristics_item_description: MATL-CRES STEEL QQ-S-763,CL304,CONDITION A HF AND PICKLED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-185-6389, 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
5190405
NSN: 5310-00-185-6389
FSC: 5310
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
end_item_identificationCLOSE-IN WEAPON SYS MK15 MOD II
general_characteristics_item_descriptionMATL-CRES STEEL QQ-S-763,CL304,CONDITION A HF AND PICKLED
NSN5310-00-185-6389
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 5190405 · 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
•
NUT STYLE: ROUND
•
NOMINAL THREAD SIZE: 1.563 INCHES IN
•
HARDNESS RATING: 66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM
•
THREAD QUANTITY PER INCH: 18
•
THREAD SERIES: UNEF
•
THREAD CLASS: 2B
•
DRIVE POINT QUANTITY: 4
TECHNICAL CHARACTERISTICS (FLIS)
NUT STYLEROUND
NOMINAL THREAD SIZE1.563 INCHES IN
HARDNESS RATING66.0 ROCKWELL B MINIMUM AND 92.0 ROCKWELL B MAXIMUM
END ITEM IDENTIFICATIONLOGISTGICS SUPPORT VESSEL
THREAD QUANTITY PER INCH18
THREAD SERIESUNEF
THREAD CLASS2B
DRIVE POINT QUANTITY4
NUT DIAMETER2.230 INCHES MINIMUM AND 2.260 INCHES MAXIMUM IN
DRIVE POINT DEPTH0.094 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 33
60625Interchangeable
interchangeable cross-reference
interchangeable
3210830Interchangeable
interchangeable cross-reference
interchangeable
8Interchangeable
interchangeable cross-reference
interchangeable
27316-03Interchangeable
interchangeable cross-reference
interchangeable
N2731603Interchangeable
interchangeable cross-reference
interchangeable
713-8-11Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5190405?
5190405 is a WEDGE,COLLAR.
What parts can replace 5190405?
There are 33 known substitutes for 5190405: 60625, 3210830, 8 and 30 more. Substitute compatibility should be verified for your specific system.
Is 5190405 still available?
5190405 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