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PartsTable / COMPONENT / 18-161-4
18-161-4 ✓ 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: RUBBER SYNTHETIC OVERALL, head_style: HEXAGON, grip_length: 0.594 INCHES NOMINAL IN, head_height: 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN, thread_class: 2A A, thread_length: 0.875 INCHES MINIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-013-7783, 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
18-161-4
NSN: 5330-00-013-7783
FSC: 5330
CAGE: 29510 — KOMATSU AMERICAN INTL CO (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
head_styleHEXAGON
grip_length0.594 INCHES NOMINAL IN
head_height0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM IN
thread_class2A A
thread_length0.875 INCHES MINIMUM IN
overall_length0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
fastener_length1.438 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
hardness_rating23.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL
mounting_methodTERMINAL
terminal_length1.500 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN
overall_diameter0.335 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
NSN5330-00-013-7783
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 18-161-4 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
•
CENTER HOLE DIAMETER: 4.125 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: O-RING
•
MATERIAL: RUBBER SYNTHETIC OVERALL
•
CROSS-SECTIONAL HEIGHT: 0.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER4.125 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEO-RING
MATERIALRUBBER SYNTHETIC OVERALL
CROSS-SECTIONAL HEIGHT0.375 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
FFS85Interchangeable
interchangeable cross-reference
interchangeable
MS35298-38Interchangeable
interchangeable cross-reference
interchangeable
181614Interchangeable
interchangeable cross-reference
interchangeable
5961PL2156825Interchangeable
interchangeable cross-reference
interchangeable
2N697Interchangeable
interchangeable cross-reference
interchangeable
853-24318-60Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 18-161-4?
18-161-4 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace 18-161-4?
There are 6 known substitutes for 18-161-4: FFS85, MS35298-38, 181614 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 18-161-4?
18-161-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-013-7783. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026