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3121-4-8 — MICROCIRCUIT,DIGITAL

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

3121-4-8: MICROCIRCUIT,DIGITAL.

The MICROCIRCUIT,DIGITAL is a the manufacturer industrial component. Key specifications include cushion: NOT INCLUDED, material: COPPER ALLOY LOCATION NOT OTHERWISE SPECIFIED, body_width: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, body_height: 0.160 INCHES MAXIMUM IN, body_length: 0.815 INCHES MINIMUM AND 0.840 INCHES MAXIMUM IN, mounting_pad: NOT INCLUDED. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-583-5049, 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
3121-4-8
NSN: 5340-00-583-5049
NIINs: 005835049, 011607078
FSC: 5340 — Hardware, Commercial
CAGE: 45681 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV CORPORATE HEADQUARTERS (USA)
SPECIFICATIONS
cushionNOT INCLUDED
materialCOPPER ALLOY LOCATION NOT OTHERWISE SPECIFIED
body_width0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
body_height0.160 INCHES MAXIMUM IN
body_length0.815 INCHES MINIMUM AND 0.840 INCHES MAXIMUM IN
mounting_padNOT INCLUDED
overall_width0.500 INCHES NOMINAL IN
overall_length1.688 INCHES NOMINAL IN
style_designatorDOUBLE ARCH
features_providedASYNCHRONOUS AND W/RESET AND W/CLOCK AND W/ENABLE AND W/RESISTOR
output_logic_formEMITTER-COUPLED LOGIC
inclosure_materialPLASTIC
NSN5340-00-583-5049
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3121-4-8 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
•
MOUNTING HOLE SIZE: 0.219 INCHES NOMINAL IN
•
MOUNTING PAD: NOT INCLUDED
•
STYLE DESIGNATOR: DOUBLE ARCH
•
MATERIAL THICKNESS: 0.047 INCHES NOMINAL IN
•
CUSHION: NOT INCLUDED
•
DISTANCE BETWEEN BASE AND INSIDE OF ARCH: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
MOUNTING HOLE SIZE0.219 INCHES NOMINAL IN
MOUNTING PADNOT INCLUDED
STYLE DESIGNATORDOUBLE ARCH
OVERALL LENGTH1.688 INCHES NOMINAL IN
OVERALL WIDTH0.500 INCHES NOMINAL IN
MATERIAL THICKNESS0.047 INCHES NOMINAL IN
CUSHIONNOT INCLUDED
DISTANCE BETWEEN BASE AND INSIDE OF ARCH0.500 INCHES NOMINAL IN
MATERIALCOPPER ALLOY LOCATION NOT OTHERWISE SPECIFIED
CENTER TO CENTER DISTANCE BETWEEN ARCH AND MOUNTING HOLE0.547 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3121-4-8?
3121-4-8 is a MICROCIRCUIT,DIGITAL.
What is the NSN for 3121-4-8?
3121-4-8 is cataloged in the U.S. Government catalog under NSN 5340-00-583-5049. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.