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PartsTable / COMPONENT / SMB342387
SMB342387 ✓ 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 CLAMP,SYNCHRO is a the manufacturer industrial component. Key specifications include width: 0.375 INCHES NOMINAL IN, height: 0.108 INCHES NOMINAL IN, length: 0.874 INCHES NOMINAL IN, material: STEEL COMP 1045, furnished_items: LOCKNUT, nominal_thread_size: 0.138 INCHES 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 5340-00-757-2263, 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
SMB342387
NSN: 5340-00-757-2263
FSC: 5340
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
width0.375 INCHES NOMINAL IN
height0.108 INCHES NOMINAL IN
length0.874 INCHES NOMINAL IN
materialSTEEL COMP 1045
furnished_itemsLOCKNUT
nominal_thread_size0.138 INCHES IN
thread_series_designatorUNF
material_document_and_classificationAISI ASSN STD SINGLE MATERIAL RESPONSE
NSN5340-00-757-2263
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SMB342387 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
•
FURNISHED ITEMS: LOCKNUT
•
WIDTH: 0.375 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.138 INCHES IN
•
THREAD SERIES DESIGNATOR: UNF
•
MATERIAL: STEEL COMP 1045
•
HEIGHT: 0.108 INCHES NOMINAL IN
•
LENGTH: 0.874 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: AISI ASSN STD SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
FURNISHED ITEMSLOCKNUT
WIDTH0.375 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.138 INCHES IN
THREAD SERIES DESIGNATORUNF
MATERIALSTEEL COMP 1045
HEIGHT0.108 INCHES NOMINAL IN
LENGTH0.874 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONAISI ASSN STD SINGLE MATERIAL RESPONSE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
60678Interchangeable
interchangeable cross-reference
interchangeable
606783Interchangeable
interchangeable cross-reference
interchangeable
W-5138Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SMB342387?
SMB342387 is a CLAMP,SYNCHRO.
What parts can replace SMB342387?
There are 3 known substitutes for SMB342387: 60678, 606783, W-5138. Substitute compatibility should be verified for your specific system.
What is the NSN for SMB342387?
SMB342387 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-757-2263. 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