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PartsTable / COMPONENT / ST21900021-112
ST21900021-112 ✓ 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: 0.128 INCHES NOMINAL IN, material: PLASTIC POLYAMIDE NYLON BAND, overall_width: 0.281 INCHES NOMINAL IN, style_designator: SINGLE LOOP, tongue_hole_type: ROUND, UNTHREADED, material_thickness: 0.032 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-950-2764, 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
ST21900021-112
NSN: 5340-00-950-2764
FSC: 5340
CAGE: 81395 — BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC. DBA BAE SYSTEMS (USA)
SPECIFICATIONS
diameter0.128 INCHES NOMINAL IN
materialPLASTIC POLYAMIDE NYLON BAND
overall_width0.281 INCHES NOMINAL IN
style_designatorSINGLE LOOP
tongue_hole_typeROUND, UNTHREADED
material_thickness0.032 INCHES NOMINAL IN
loop_inside_diameter0.125 INCHES NOMINAL IN
distance_from_loop_center_to_tongue_end0.446 INCHES NOMINAL IN
center_to_center_distance_between_loop_and_mounting_hole0.275 INCHES NOMINAL IN
NSN5340-00-950-2764
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: ST21900021-112 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
•
LOOP INSIDE DIAMETER: 0.125 INCHES NOMINAL IN
•
DIAMETER: 0.128 INCHES NOMINAL IN
•
MATERIAL: PLASTIC POLYAMIDE NYLON BAND
•
STYLE DESIGNATOR: SINGLE LOOP
•
MATERIAL THICKNESS: 0.032 INCHES NOMINAL IN
•
TONGUE HOLE TYPE: ROUND, UNTHREADED
•
CENTER TO CENTER DISTANCE BETWEEN LOOP AND MOUNTING HOLE: 0.275 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
LOOP INSIDE DIAMETER0.125 INCHES NOMINAL IN
DIAMETER0.128 INCHES NOMINAL IN
MATERIALPLASTIC POLYAMIDE NYLON BAND
OVERALL WIDTH0.281 INCHES NOMINAL IN
STYLE DESIGNATORSINGLE LOOP
MATERIAL THICKNESS0.032 INCHES NOMINAL IN
TONGUE HOLE TYPEROUND, UNTHREADED
CENTER TO CENTER DISTANCE BETWEEN LOOP AND MOUNTING HOLE0.275 INCHES NOMINAL IN
DISTANCE FROM LOOP CENTER TO TONGUE END0.446 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
SM-C-920478-11Upgraded Successor
successor cross-reference
successor
1/8-2NAUpgraded Successor
successor cross-reference
successor
2603929-1Interchangeable
interchangeable cross-reference
interchangeable
50878-1Interchangeable
interchangeable cross-reference
interchangeable
42100000-1Interchangeable
interchangeable cross-reference
interchangeable
961-8001Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ST21900021-112?
ST21900021-112 is a CLAMP,LOOP.
What parts can replace ST21900021-112?
There are 15 known substitutes for ST21900021-112: SM-C-920478-11, 1/8-2NA, 2603929-1 and 12 more. Substitute compatibility should be verified for your specific system.
Is ST21900021-112 still available?
ST21900021-112 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