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Technical Data Sheet
21271 ✓ Verified by PartsTable
Legrand · 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 CARTRIDGE,IMPULSE is a Legrand industrial component. Key specifications include material: STEEL CASE, thread_size: 0.500-20, thread_class: 2A A, body_diameter: 0.500 INCHES NOMINAL IN, terminal_type: SOCKET, 4 PIN, overall_length: 0.971 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-141-4199, 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
21271
NSN: 5330-00-141-4199
FSC: 5330
CAGE: 35510 — PRESTOLITE ELECTRIC INC (USA)
SPECIFICATIONS
materialSTEEL CASE
thread_size0.500-20
thread_class2A A
body_diameter0.500 INCHES NOMINAL IN
terminal_typeSOCKET, 4 PIN
overall_length0.971 INCHES NOMINAL IN
voltage_in_volts500.0
width_across_flats0.620 INCHES NOMINAL IN
wrenching_facilityINCLUDED
color_coded_featureNOT INCLUDED
case_mounting_threadINCLUDED
charged_end_diameter0.620 INCHES NOMINAL IN
NSN5330-00-141-4199
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 21271 MFR: Legrand ⚠ 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
SEALING ELEMENT STYLE: ANGULAR
ACCOMMODATED SHAFT DIAMETER: 0.750 INCHES NOMINAL IN
HOUSING BORE DIAMETER: 1.752 INCHES NOMINAL IN
MAXIMUM PRESSURE RATING: 7.0 POUNDS PER SQUARE INCH (PSI) LBS
MATERIAL: RUBBER SYNTHETIC SEALING ELEMENT B
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 2000 FEET PER MINUTE FT
CASE STYLE: SQUARE
TECHNICAL CHARACTERISTICS (FLIS)
SEALING ELEMENT STYLEANGULAR
ACCOMMODATED SHAFT DIAMETER0.750 INCHES NOMINAL IN
HOUSING BORE DIAMETER1.752 INCHES NOMINAL IN
MAXIMUM PRESSURE RATING7.0 POUNDS PER SQUARE INCH (PSI) LBS
MATERIALRUBBER SYNTHETIC SEALING ELEMENT B
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE FT
CASE STYLESQUARE
MATERIALLEATHER SEALING ELEMENT A
SEAL WIDTH0.406 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 30
10049313-1Interchangeable
interchangeable cross-reference
interchangeable
10049313Interchangeable
interchangeable cross-reference
interchangeable
5022-2Interchangeable
interchangeable cross-reference
interchangeable
23034Interchangeable
interchangeable cross-reference
interchangeable
T-100-SMInterchangeable
interchangeable cross-reference
interchangeable
53534Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21271?
21271 is a CARTRIDGE,IMPULSE manufactured by Legrand.
What parts can replace 21271?
There are 30 known substitutes for 21271: 10049313-1, 10049313, 5022-2 and 27 more. Substitute compatibility should be verified for your specific system.
Is 21271 still available?
21271 is currently cancelled.
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