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Technical Data Sheet
PartsTable / COMPONENT / SM-B-187803
SM-B-187803 ✓ 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 STOP,MECHANICAL is a the manufacturer industrial component. Key specifications include material: STEEL, design_type: STRAIGHT, overall_width: 0.3750 INCHES NOMINAL IN, overall_height: 0.2500 INCHES NOMINAL IN, overall_length: 0.7188 INCHES NOMINAL 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 5340-00-652-5680, 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
SM-B-187803
NSN: 5340-00-652-5680
FSC: 5340
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
materialSTEEL
design_typeSTRAIGHT
overall_width0.3750 INCHES NOMINAL IN
overall_height0.2500 INCHES NOMINAL IN
overall_length0.7188 INCHES NOMINAL IN
NSN5340-00-652-5680
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SM-B-187803 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
•
DESIGN TYPE: STRAIGHT
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH0.3750 INCHES NOMINAL IN
OVERALL HEIGHT0.2500 INCHES NOMINAL IN
DESIGN TYPESTRAIGHT
MATERIALSTEEL
OVERALL LENGTH0.7188 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
60018Interchangeable
interchangeable cross-reference
interchangeable
8-08416Interchangeable
interchangeable cross-reference
interchangeable
50-10629 4533-9/32Interchangeable
interchangeable cross-reference
interchangeable
20018Interchangeable
interchangeable cross-reference
interchangeable
1655SIZE9/32Interchangeable
interchangeable cross-reference
interchangeable
D10734-94-61Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SM-B-187803?
SM-B-187803 is a STOP,MECHANICAL.
What parts can replace SM-B-187803?
There are 15 known substitutes for SM-B-187803: 60018, 8-08416, 50-10629 4533-9/32 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SM-B-187803?
SM-B-187803 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-652-5680. 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