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GC12H12 ✓ 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,LOOP is a the manufacturer industrial component. Key specifications include diameter: 0.204 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING BAND, overall_width: 0.500 INCHES NOMINAL IN, style_designator: SINGLE LOOP, surface_treatment: PASSIVATE BAND, material_thickness: 0.050 INCHES NOMINAL 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 5340-00-060-2124, 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
GC12H12
NSN: 5340-00-060-2124
FSC: 5340
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
diameter0.204 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING BAND
overall_width0.500 INCHES NOMINAL IN
style_designatorSINGLE LOOP
surface_treatmentPASSIVATE BAND
material_thickness0.050 INCHES NOMINAL IN
loop_inside_diameter0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN
specification/standard_data26512-GC12H MANUFACTURERS SPECIFICATION
material_document_and_classificationAMS 5517 ASSN STD SINGLE MATERIAL RESPONSE BAND
distance_from_loop_center_to_tongue_end1.001 INCHES NOMINAL IN
center_to_center_distance_between_loop_and_mounting_hole0.783 INCHES NOMINAL IN
NSN5340-00-060-2124
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: GC12H12 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
•
MATERIAL THICKNESS: 0.050 INCHES NOMINAL IN
•
DIAMETER: 0.204 INCHES NOMINAL IN
•
CENTER TO CENTER DISTANCE BETWEEN LOOP AND MOUNTING HOLE: 0.783 INCHES NOMINAL IN
•
SURFACE TREATMENT: PASSIVATE BAND
•
DISTANCE FROM LOOP CENTER TO TONGUE END: 1.001 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SINGLE LOOP
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5517 ASSN STD SINGLE MATERIAL RESPONSE BAND
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL THICKNESS0.050 INCHES NOMINAL IN
DIAMETER0.204 INCHES NOMINAL IN
CENTER TO CENTER DISTANCE BETWEEN LOOP AND MOUNTING HOLE0.783 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE BAND
DISTANCE FROM LOOP CENTER TO TONGUE END1.001 INCHES NOMINAL IN
STYLE DESIGNATORSINGLE LOOP
OVERALL WIDTH0.500 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5517 ASSN STD SINGLE MATERIAL RESPONSE BAND
MATERIALSTEEL CORROSION RESISTING BAND
LOOP INSIDE DIAMETER0.735 INCHES MINIMUM AND 0.765 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
NAS1715CT32SWHUpgraded Successor
successor cross-reference
successor
NAS1715Upgraded Successor
successor cross-reference
successor
NAS1715C12KInterchangeable
interchangeable cross-reference
interchangeable
NAS1715C12TWInterchangeable
interchangeable cross-reference
interchangeable
466SS12Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GC12H12?
GC12H12 is a CLAMP,LOOP.
What parts can replace GC12H12?
There are 5 known substitutes for GC12H12: NAS1715CT32SWH, NAS1715, NAS1715C12K and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GC12H12?
GC12H12 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-060-2124. 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