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Technical Data Sheet
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503883 ✓ 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 O-RING is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC, cross-sectional_height: 0.062 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-163-1920, 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
503883
NSN: 5310-00-163-1920
FSC: 5310
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC
cross-sectional_height0.062 INCHES NOMINAL IN
NSN5310-00-163-1920
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 503883 · 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
•
PLATE THICKNESS: 0.032 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
•
NUT HEIGHT: 0.138 INCHES MAXIMUM IN
•
HARDNESS RATING: 29.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM
•
NOMINAL THREAD SIZE: 0.138 INCHES IN
•
THREAD SERIES: UNJC
•
THREAD QUANTITY PER INCH: 32
•
SURFACE TREATMENT: CADMIUM OVERALL
•
NUT LENGTH: 0.416 INCHES MINIMUM AND 0.422 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
PLATE THICKNESS0.032 INCHES MINIMUM AND 0.042 INCHES MAXIMUM IN
NUT HEIGHT0.138 INCHES MAXIMUM IN
HARDNESS RATING29.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM
NOMINAL THREAD SIZE0.138 INCHES IN
THREAD SERIESUNJC
THREAD QUANTITY PER INCH32
SURFACE TREATMENTCADMIUM OVERALL
NUT LENGTH0.416 INCHES MINIMUM AND 0.422 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 1042 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
FF-S-210Interchangeable
interchangeable cross-reference
interchangeable
FF-S-210 TYPE 2 STYLE 1Interchangeable
interchangeable cross-reference
interchangeable
FFS103TYPE2STYLE1Interchangeable
interchangeable cross-reference
interchangeable
50388-5Interchangeable
interchangeable cross-reference
interchangeable
50388-3Interchangeable
interchangeable cross-reference
interchangeable
26771Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 503883?
503883 is a O-RING.
What parts can replace 503883?
There are 9 known substitutes for 503883: FF-S-210, FF-S-210 TYPE 2 STYLE 1, FFS103TYPE2STYLE1 and 6 more. Substitute compatibility should be verified for your specific system.
Is 503883 still available?
503883 is currently cancelled.
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PartsTable Design LLC · partstable.com
Last verified: July 2026