PartsTable
Technical Data Sheet
203-1011P63 ✓ 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,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 NUT, nut_style: HEXAGON, nut_height: 0.208 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN, lubrication: SOLUBLE LUBRICANT, temp_rating: 250.0 FAHRENHEIT NOMINAL DEGF, thread_class: 3B. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-208-9255, 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
203-1011P63
NSN: 5310-00-208-9255
FSC: 5310
CAGE: 54X10 — RAYTHEON COMPANY (USA)
SPECIFICATIONS
materialSTEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 NUT
nut_styleHEXAGON
nut_height0.208 INCHES MINIMUM AND 0.281 INCHES MAXIMUM IN
lubricationSOLUBLE LUBRICANT
temp_rating250.0 FAHRENHEIT NOMINAL DEGF
thread_class3B
thread_seriesUNIFIED NATIONAL JOINT FINE (UNJF)
locking_featurePREVAILING TORQUE WITH NONMETALLIC INSERT
thread_directionRIGHT-HAND
countersink_angle88.0 DEGREES NOMINAL NUT
surface_treatmentPASSIVATE OVERALL EXCEPT INSERT
width_across_flats0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
NSN5310-00-208-9255
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 203-1011P63 · 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
COUNTERSINK ANGLE: 88.0 DEGREES NOMINAL NUT
TEMP RATING: 250.0 FAHRENHEIT NOMINAL DEGF
THREAD SERIES: UNIFIED NATIONAL JOINT FINE (UNJF)
NOMINAL THREAD SIZE: 0.190 INCHES IN
WIDTH ACROSS FLATS: 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
THREAD QUANTITY PER INCH: 32
BEARING SURFACE FINISH: 125.0 MICROINCHES
TECHNICAL CHARACTERISTICS (FLIS)
COUNTERSINK ANGLE88.0 DEGREES NOMINAL NUT
TEMP RATING250.0 FAHRENHEIT NOMINAL DEGF
THREAD SERIESUNIFIED NATIONAL JOINT FINE (UNJF)
NOMINAL THREAD SIZE0.190 INCHES IN
WIDTH ACROSS FLATS0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
END ITEM IDENTIFICATIONMRAP - COUGAR AMBULANCE; MEDIUM MINE PROTECTED VEHICLE - MMPV; MRAP BUFFALO MK2A2; MULTIPLE LAUNCH ROCKET SYSTEM (MLRS); MULTIPLE LAUNCH ROCKET SYSTEM (MLRS); A4 BRADLEY FIGHTING VEHICLE; A3 BRADLEY FIGHTING VEHICLE
THREAD QUANTITY PER INCH32
BEARING SURFACE FINISH125.0 MICROINCHES
THREAD DIRECTIONRIGHT-HAND
SURFACE TREATMENTPASSIVATE OVERALL EXCEPT INSERT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
1033Interchangeable
interchangeable cross-reference
interchangeable
A52491-93Interchangeable
interchangeable cross-reference
interchangeable
LESS0NInterchangeable
interchangeable cross-reference
interchangeable
118607Interchangeable
interchangeable cross-reference
interchangeable
35FFUSEInterchangeable
interchangeable cross-reference
interchangeable
MIL-N-25027Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 203-1011P63?
203-1011P63 is a NUT,SELF-LOCKING,HEXAGON.
What parts can replace 203-1011P63?
There are 22 known substitutes for 203-1011P63: 1033, A52491-93, LESS0N and 19 more. Substitute compatibility should be verified for your specific system.
Is 203-1011P63 still available?
203-1011P63 is currently cancelled.
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