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PartsTable / COMPONENT / A357-4
A357-4 ✓ 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 MICROCIRCUIT,DIGITAL is a the manufacturer industrial component. Key specifications include material: ALUMINUM OVERALL, body_width: 0.220 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN, body_height: 0.140 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN, body_length: 0.660 INCHES MINIMUM AND 0.785 INCHES MAXIMUM IN, overall_length: 3.250 INCHES NOMINAL IN, handle_clearance: 1.250 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-186-9481, 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
A357-4
NSN: 5340-00-186-9481
FSC: 5340
CAGE: 04729 — UNICORP. (USA)
SPECIFICATIONS
materialALUMINUM OVERALL
body_width0.220 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN
body_height0.140 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN
body_length0.660 INCHES MINIMUM AND 0.785 INCHES MAXIMUM IN
overall_length3.250 INCHES NOMINAL IN
handle_clearance1.250 INCHES NOMINAL IN
features_providedMONOLITHIC AND POSITIVE OUTPUTS AND MEDIUM POWER AND MEDIUM SPEED AND W/TOTEM POLE OUTPUT
output_logic_formTRANSISTOR-TRANSISTOR LOGIC
precious_materialSILVER
surface_treatmentANODIZE OVERALL
inclosure_materialPLASTIC
rotary_pump_designGEAR
NSN5340-00-186-9481
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A357-4 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: ANODIZE OVERALL
•
MATERIAL: ALUMINUM OVERALL
•
HANDLE CLEARANCE: 1.250 INCHES NOMINAL IN
•
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO LENGTH: 3.000 INCHES NOMINAL IN
•
MOUNTING FACILITY QUANTITY: 2
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
NOMINAL THREAD SIZE: 0.164 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENTANODIZE OVERALL
MATERIALALUMINUM OVERALL
HANDLE CLEARANCE1.250 INCHES NOMINAL IN
OVERALL LENGTH3.250 INCHES NOMINAL IN
CENTER TO CENTER DISTANCE BETWEEN MOUNTING FACILITIES PARALLEL TO LENGTH3.000 INCHES NOMINAL IN
MOUNTING FACILITY QUANTITY2
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD SIZE0.164 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
5081-4508Interchangeable
interchangeable cross-reference
interchangeable
12912Interchangeable
interchangeable cross-reference
interchangeable
PS76024-1Interchangeable
interchangeable cross-reference
interchangeable
MODEL 131Interchangeable
interchangeable cross-reference
interchangeable
TLC801Interchangeable
interchangeable cross-reference
interchangeable
2L5441-005-880030Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A357-4?
A357-4 is a MICROCIRCUIT,DIGITAL.
What parts can replace A357-4?
There are 23 known substitutes for A357-4: 5081-4508, 12912, PS76024-1 and 20 more. Substitute compatibility should be verified for your specific system.
Is A357-4 still available?
A357-4 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: July 2026