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Technical Data Sheet
PartsTable / COMPONENT / MS21105-21
MS21105-21 ✓ 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: OFFSET MOUNT, tongue_hole_type: ROUND, UNTHREADED, surface_treatment: PASSIVATE BAND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-254-5017, 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
MS21105-21
NSN: 5340-00-254-5017
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 CORROSION RESISTING BAND
overall_width0.500 INCHES NOMINAL IN
style_designatorOFFSET MOUNT
tongue_hole_typeROUND, UNTHREADED
surface_treatmentPASSIVATE BAND
material_thickness0.032 INCHES NOMINAL IN
loop_inside_diameter1.313 INCHES NOMINAL IN
cushioning_environmental_protectionFUEL, AROMATIC
material_document_and_classificationMIL-S-6721 MIL SPEC SINGLE MATERIAL RESPONSE BAND
distance_from_loop_center_to_tongue_end1.342 INCHES NOMINAL IN
center_to_center_distance_between_loop_and_mounting_hole1.124 INCHES NOMINAL IN
NSN5340-00-254-5017
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS21105-21 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: STEEL CORROSION RESISTING BAND
•
SURFACE TREATMENT: PASSIVATE BAND
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-6721 MIL SPEC SINGLE MATERIAL RESPONSE BAND
•
CUSHIONING ENVIRONMENTAL PROTECTION: FUEL, AROMATIC
•
CENTER TO CENTER DISTANCE BETWEEN LOOP AND MOUNTING HOLE: 1.124 INCHES NOMINAL IN
•
DIAMETER: 0.204 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL CORROSION RESISTING BAND
OVERALL WIDTH0.500 INCHES NOMINAL IN
SURFACE TREATMENTPASSIVATE BAND
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6721 MIL SPEC SINGLE MATERIAL RESPONSE BAND
CUSHIONING ENVIRONMENTAL PROTECTIONFUEL, AROMATIC
MATERIALRUBBER SILICONE CLASS Q OR PLASTIC CUSHION
CENTER TO CENTER DISTANCE BETWEEN LOOP AND MOUNTING HOLE1.124 INCHES NOMINAL IN
DIAMETER0.204 INCHES NOMINAL IN
DISTANCE FROM LOOP CENTER TO TONGUE END1.342 INCHES NOMINAL IN
TONGUE HOLE TYPEROUND, UNTHREADED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
MIL-DTL-8603Upgraded Successor
successor cross-reference
successor
TA1716WS4Upgraded Successor
successor cross-reference
successor
MS21919WG4Upgraded Successor
successor cross-reference
successor
10335339Upgraded Successor
successor cross-reference
successor
AS21919WCG03Upgraded Successor
successor cross-reference
successor
AS21919Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS21105-21?
MS21105-21 is a CLAMP,LOOP.
What parts can replace MS21105-21?
There are 12 known substitutes for MS21105-21: MIL-DTL-8603, TA1716WS4, MS21919WG4 and 9 more. Substitute compatibility should be verified for your specific system.
Is MS21105-21 still available?
MS21105-21 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