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Technical Data Sheet
PartsTable / COMPONENT / MS21103-37
MS21103-37 ✓ 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 COMP 321 OR STEEL COMP 348 BAND, overall_width: 0.500 INCHES NOMINAL IN, style_designator: SINGLE LOOP, tongue_hole_type: ROUND, UNTHREADED, surface_treatment: PASSIVATE BAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-279-4295, 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
MS21103-37
NSN: 5340-00-279-4295
FSC: 5340
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
diameter0.204 INCHES NOMINAL IN
materialSTEEL COMP 321 OR STEEL COMP 348 BAND
overall_width0.500 INCHES NOMINAL IN
style_designatorSINGLE LOOP
tongue_hole_typeROUND, UNTHREADED
surface_treatmentPASSIVATE BAND
material_thickness0.036 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
loop_inside_diameter2.297 INCHES MINIMUM AND 2.327 INCHES MAXIMUM IN
material_document_and_classificationMIL-S-6721ANNEALED MIL SPEC ALL MATERIAL RESPONSES BAND
distance_from_loop_center_to_tongue_end1.788 INCHES NOMINAL IN
surface_treatment_document_and_classificationQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE BAND
center_to_center_distance_between_loop_and_mounting_hole1.570 INCHES NOMINAL IN
NSN5340-00-279-4295
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS21103-37 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: PASSIVATE BAND
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE BAND
•
CENTER TO CENTER DISTANCE BETWEEN LOOP AND MOUNTING HOLE: 1.570 INCHES NOMINAL IN
•
DISTANCE FROM LOOP CENTER TO TONGUE END: 1.788 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP 321 OR STEEL COMP 348 BAND
•
MATERIAL THICKNESS: 0.036 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
•
TONGUE HOLE TYPE: ROUND, UNTHREADED
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTPASSIVATE BAND
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE BAND
CENTER TO CENTER DISTANCE BETWEEN LOOP AND MOUNTING HOLE1.570 INCHES NOMINAL IN
DISTANCE FROM LOOP CENTER TO TONGUE END1.788 INCHES NOMINAL IN
MATERIALSTEEL COMP 321 OR STEEL COMP 348 BAND
MATERIAL THICKNESS0.036 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN
OVERALL WIDTH0.500 INCHES NOMINAL IN
TONGUE HOLE TYPEROUND, UNTHREADED
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6721ANNEALED MIL SPEC ALL MATERIAL RESPONSES BAND
LOOP INSIDE DIAMETER2.297 INCHES MINIMUM AND 2.327 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
MS21103Interchangeable
interchangeable cross-reference
interchangeable
MS21103-7Interchangeable
interchangeable cross-reference
interchangeable
MS21103-12Interchangeable
interchangeable cross-reference
interchangeable
MS21103-28Interchangeable
interchangeable cross-reference
interchangeable
5340PL0727323Interchangeable
interchangeable cross-reference
interchangeable
5340001863389Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS21103-37?
MS21103-37 is a CLAMP,LOOP.
What parts can replace MS21103-37?
There are 16 known substitutes for MS21103-37: MS21103, MS21103-7, MS21103-12 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS21103-37?
MS21103-37 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-279-4295. 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