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Technical Data Sheet
PartsTable / COMPONENT / MC125
MC125 ✓ 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 STRAP,RETAINING is a the manufacturer industrial component. Key specifications include cushion: NOT INCLUDED, mounting_pad: NOT INCLUDED, overall_width: 1.125 INCHES NOMINAL IN, overall_length: 3.875 INCHES NOMINAL IN, style_designator: CURVED ARCH, surface_treatment: CADMIUM OR ZINC AND CHROMATE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-050-4659, 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
MC125
NSN: 5340-00-050-4659
FSC: 5340
CAGE: 72629 — GENERAL CABLE CO DIV OF GK TECHNOLOGIES INC DIAMOND EXPANSION BOLT CO DIV (USA)
SPECIFICATIONS
cushionNOT INCLUDED
materialSTEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020 OR STEEL LOCATION NOT OTHERWISE SPECIFIED
mounting_padNOT INCLUDED
overall_width1.125 INCHES NOMINAL IN
overall_length3.875 INCHES NOMINAL IN
style_designatorCURVED ARCH
surface_treatmentCADMIUM OR ZINC AND CHROMATE
material_thickness0.125 INCHES NOMINAL IN
mounting_hole_size0.406 INCHES NOMINAL IN
inside_diameter/arch_length1.900 INCHES NOMINAL IN
distance_between_base_and_inside_of_arch1.906 INCHES NOMINAL IN
center_to_center_distance_between_arch_and_mounting_hole1.656 INCHES NOMINAL IN
NSN5340-00-050-4659
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MC125 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
•
MOUNTING PAD: NOT INCLUDED
•
CENTER TO CENTER DISTANCE BETWEEN ARCH AND MOUNTING HOLE: 1.656 INCHES NOMINAL IN
•
DISTANCE BETWEEN BASE AND INSIDE OF ARCH: 1.906 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CURVED ARCH
•
MATERIAL: STEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020 OR STEEL LOCATION NOT OTHERWISE SPECIFIED
•
SURFACE TREATMENT: CADMIUM OR ZINC AND CHROMATE
•
MOUNTING HOLE SIZE: 0.406 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MOUNTING PADNOT INCLUDED
CENTER TO CENTER DISTANCE BETWEEN ARCH AND MOUNTING HOLE1.656 INCHES NOMINAL IN
DISTANCE BETWEEN BASE AND INSIDE OF ARCH1.906 INCHES NOMINAL IN
OVERALL WIDTH1.125 INCHES NOMINAL IN
STYLE DESIGNATORCURVED ARCH
MATERIALSTEEL COMP 1008 OR STEEL COMP 1009 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020 OR STEEL LOCATION NOT OTHERWISE SPECIFIED
SURFACE TREATMENTCADMIUM OR ZINC AND CHROMATE
MOUNTING HOLE SIZE0.406 INCHES NOMINAL IN
INSIDE DIAMETER/ARCH LENGTH1.900 INCHES NOMINAL IN
CUSHIONNOT INCLUDED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
FF-S-760Upgraded Successor
successor cross-reference
successor
167A33Upgraded Successor
successor cross-reference
successor
NASM760-TYP1, STYB, 5/16Upgraded Successor
successor cross-reference
successor
PTMC75Upgraded Successor
successor cross-reference
successor
NASM760Upgraded Successor
successor cross-reference
successor
MS35140-16Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MC125?
MC125 is a STRAP,RETAINING.
What parts can replace MC125?
There are 26 known substitutes for MC125: FF-S-760, 167A33, NASM760-TYP1, STYB, 5/16 and 23 more. Substitute compatibility should be verified for your specific system.
Is MC125 still available?
MC125 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026