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PartsTable / COMPONENT / K-19003
K-19003 ✓ 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 NUT,SELF-LOCKING,PLATE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, nut_style: PLATE, nut_height: 0.220 INCHES MAXIMUM IN, nut_length: 0.969 INCHES MAXIMUM IN, lubrication: DRY FILM LUBRICANT, plate_width: 0.300 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-207-5258, 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
K-19003
NSN: 5310-00-207-5258
FSC: 5310
CAGE: 15653 — HOWMET GLOBAL FASTENING SYSTEMS INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
nut_stylePLATE
nut_height0.220 INCHES MAXIMUM IN
nut_length0.969 INCHES MAXIMUM IN
lubricationDRY FILM LUBRICANT
plate_width0.300 INCHES MAXIMUM IN
temp_rating450.0 FAHRENHEIT NOMINAL DEGF
thread_class38
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
locking_featurePREVAILING TORQUE ALL METAL DESIGN
plate_thickness0.032 INCHES NOMINAL IN
thread_directionRIGHT-HAND
NSN5310-00-207-5258
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: K-19003 · 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: 550 TYPE
•
NUT MOUNTING PROVISION: STRAIGHT HOLES
•
LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN
•
THREAD DIRECTION: RIGHT-HAND
•
THREAD CLASS: 38
•
NUT LENGTH: 0.969 INCHES MAXIMUM IN
•
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG LENGTH: 0.686 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA550 TYPE
NUT MOUNTING PROVISIONSTRAIGHT HOLES
LOCKING FEATUREPREVAILING TORQUE ALL METAL DESIGN
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS38
NUT LENGTH0.969 INCHES MAXIMUM IN
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG LENGTH0.686 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN
NUT STYLEPLATE
LUBRICATIONDRY FILM LUBRICANT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
27551Interchangeable
interchangeable cross-reference
interchangeable
K-19003Interchangeable
interchangeable cross-reference
interchangeable
W2SH1032Interchangeable
Same NIIN cross-reference
interchangeable
MIL-N-25027Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is K-19003?
K-19003 is a NUT,SELF-LOCKING,PLATE.
What parts can replace K-19003?
There are 4 known substitutes for K-19003: 27551, K-19003, W2SH1032 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for K-19003?
K-19003 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-207-5258. 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