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SQ-9 ✓ 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: 0.385 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN, height: 0.062 INCHES NOMINAL IN, length: 0.319 INCHES NOMINAL IN, material: STEEL COMP 316, thread_class: 2A A, hole_diameter: 0.128 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 5340-01-082-4191, 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
SQ-9
NSN: 5340-01-082-4191
FSC: 5340
CAGE: 29440 — W. M. BERG, INC. (USA)
SPECIFICATIONS
width0.385 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
height0.062 INCHES NOMINAL IN
length0.319 INCHES NOMINAL IN
materialSTEEL COMP 316
thread_class2A A
hole_diameter0.128 INCHES NOMINAL IN
special_featuresINCL NYLON INSERT AND SCREW
nominal_thread_size0.112 INCHES IN
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
material_document_and_classificationAISI ASSN STD SINGLE MATERIAL RESPONSE
NSN5340-01-082-4191
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SQ-9 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
•
HEIGHT: 0.125 INCHES NOMINAL IN
•
NOMINAL THREAD SIZE: 0.086 INCHES IN
•
WIDTH: 0.182 INCHES NOMINAL IN
•
MATERIAL: STEEL CORROSION RESISTING
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
•
LENGTH: 0.265 INCHES NOMINAL IN
•
THREAD CLASS: 2B
TECHNICAL CHARACTERISTICS (FLIS)
HEIGHT0.125 INCHES NOMINAL IN
NOMINAL THREAD SIZE0.086 INCHES IN
WIDTH0.182 INCHES NOMINAL IN
MATERIALSTEEL CORROSION RESISTING
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
LENGTH0.265 INCHES NOMINAL IN
THREAD CLASS2B
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
L3-4Interchangeable
interchangeable cross-reference
interchangeable
SQ-9Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SQ-9?
SQ-9 is a CLAMP,SYNCHRO.
What parts can replace SQ-9?
There are 2 known substitutes for SQ-9: L3-4, SQ-9. Substitute compatibility should be verified for your specific system.
What is the NSN for SQ-9?
SQ-9 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-082-4191. 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