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1981-003 — INTERFACE UNIT,COMMUNICATION EQU

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

1981-003: INTERFACE UNIT,COMMUNICATION EQU.

INTERFACE UNIT,COMMUNICATION EQU. Key specifications include material: RUBBER CHLOROPRENE BODY, base_width: 1.750 INCHES NOMINAL IN, overall_height: 4.090 INCHES NOMINAL IN, sealing_method: MECHANICAL, base_overall_length: 3.280 INCHES NOMINAL IN, accommodation_hole_width: 1.560 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-346-3784, 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
MRO→ MRO_GENERAL→ 1981-003
NSN: 5340-01-346-3784
NIINs: 013463784, 014064353
FSC: 5340 — Hardware, Commercial
CAGE: 24179 — ENDURO RUBBER CO (USA)
SPECIFICATIONS
materialRUBBER CHLOROPRENE BODY
base_width1.750 INCHES NOMINAL IN
overall_height4.090 INCHES NOMINAL IN
sealing_methodMECHANICAL
base_overall_length3.280 INCHES NOMINAL IN
accommodation_hole_width1.560 INCHES NOMINAL IN
accommodation_hole_length2.290 INCHES NOMINAL IN
NSN5340-01-346-3784
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1981-003 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
•
ACCOMMODATION HOLE WIDTH: 1.560 INCHES NOMINAL IN
•
SEALING METHOD: MECHANICAL
•
BASE OVERALL LENGTH: 3.280 INCHES NOMINAL IN
•
BASE WIDTH: 1.750 INCHES NOMINAL IN
•
ACCOMMODATION HOLE LENGTH: 2.290 INCHES NOMINAL IN
•
MATERIAL: RUBBER CHLOROPRENE BODY
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT4.090 INCHES NOMINAL IN
ACCOMMODATION HOLE WIDTH1.560 INCHES NOMINAL IN
SEALING METHODMECHANICAL
BASE OVERALL LENGTH3.280 INCHES NOMINAL IN
BASE WIDTH1.750 INCHES NOMINAL IN
ACCOMMODATION HOLE LENGTH2.290 INCHES NOMINAL IN
MATERIALRUBBER CHLOROPRENE BODY
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 1981-003?
1981-003 is a INTERFACE UNIT,COMMUNICATION EQU. It is classified as a MRO (MRO_GENERAL).
What is the NSN for 1981-003?
1981-003 is cataloged in the U.S. Government catalog under NSN 5340-01-346-3784. This indicates validated use in U.S. government and defense supply chains.
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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.