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GC503A1 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The CLAMP,INSTRUMENT MOUNTING is a the manufacturer industrial component. Key specifications include color: BLACK, width: 1.000 INCHES NOMINAL IN, material: ALUMINUM ALLOY, surface_treatment: ANODIZE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-564-6682, 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
GC503A1
NSN: 5340-00-564-6682
FSC: 5340
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
colorBLACK
width1.000 INCHES NOMINAL IN
materialALUMINUM ALLOY
surface_treatmentANODIZE
NSN5340-00-564-6682
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: GC503A1 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
•
SURFACE TREATMENT: ANODIZE
•
MATERIAL: ALUMINUM ALLOY
•
COLOR: BLACK
•
WIDTH: 1.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTANODIZE
MATERIALALUMINUM ALLOY
COLORBLACK
WIDTH1.000 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
18117Upgraded Successor
successor cross-reference
successor
400-2367-101Interchangeable
interchangeable cross-reference
interchangeable
W13AAP078REV4Interchangeable
interchangeable cross-reference
interchangeable
1202Interchangeable
interchangeable cross-reference
interchangeable
1202-TVHInterchangeable
interchangeable cross-reference
interchangeable
6748Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GC503A1?
GC503A1 is a CLAMP,INSTRUMENT MOUNTING.
What parts can replace GC503A1?
There are 15 known substitutes for GC503A1: 18117, 400-2367-101, W13AAP078REV4 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GC503A1?
GC503A1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-564-6682. 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