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02503 — SCREW,SPECIAL,ADJUS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

02503: SCREW,SPECIAL,ADJUS.

The SCREW,SPECIAL,ADJUS is a the manufacturer industrial component. Key specifications include end_item_identification: ENGINE,J57,AIRCRAFT,F101, part_name_assigned_by_controlling_agency: NAVY SPECIAL PROJECT. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-499-5696, 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
02503
NSN: 5331-00-499-5696
NIINs: 004995696, 006975754
FSC: 5331 — O-ring
CAGE: 14153 — DEFENSE LOGISTICS AGENCY DBA DEFENSE SUPPLY CENTER PHILADELPHIA (USA)
SPECIFICATIONS
end_item_identificationENGINE,J57,AIRCRAFT,F101
general_characteristics_item_descriptionCRES PER QQ-S-763A CLASS 5 TYPE A,3.062 IN. O/A LG,0.125 IN. HEIGHT,0.864 IN. MIN,0.869 IN. MAX OD,0.312 IN. ID,1/2-20 UN3 THD,0.4649 IN. MIN,0.4675 IN. PITCH DIA A
part_name_assigned_by_controlling_agencyNAVY SPECIAL PROJECT
NSN5331-00-499-5696
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 02503 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CROSS-SECTIONAL HEIGHT: 0.105 INCHES MINIMUM AND 0.111 INCHES MAXIMUM IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM D2000 4CH810 A25 B14 EF31 E015 E035 ASSN STD SINGLE MATERIAL RESPONSE
•
CENTER HOLE DIAMETER: 1.953 INCHES MINIMUM AND 1.987 INCHES MAXIMUM IN
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MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.105 INCHES MINIMUM AND 0.111 INCHES MAXIMUM IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM D2000 4CH810 A25 B14 EF31 E015 E035 ASSN STD SINGLE MATERIAL RESPONSE
CENTER HOLE DIAMETER1.953 INCHES MINIMUM AND 1.987 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
SUBSTITUTES & CROSS-REFERENCES 1
68-740Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedAcquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 02503?
02503 is a SCREW,SPECIAL,ADJUS.
What parts can replace 02503?
There is 1 known substitute for 02503: 68-740. Substitute compatibility should be verified for your specific system.
What is the NSN for 02503?
02503 is cataloged in the U.S. Government catalog under NSN 5331-00-499-5696. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
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.