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Technical Data Sheet
PartsTable / COMPONENT / 20-660
20-660 ✓ Verified by PartsTable
Exost · 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 SEMICONDUCTOR DEVICES,UNITIZED is a Exost industrial component. Key specifications include guide: NOT INCLUDED, length: 60.0 MILLIMETERS NOMINAL MM, diameter: 0.938 INCHES NOMINAL IN, material: CERAMIC OR GLASS ENCLOSURE, flute_type: INTEGRAL, head_style: FILLISTER COUNTERSUNK. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-171-5672, 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
20-660
NSN: 5330-00-171-5672
FSC: 5330
CAGE: 79150 — DANA AUTOMOTIVE SYSTEMS GROUP, LLC DBA DANA SEALING PRODUCTS (USA)
SPECIFICATIONS
guideNOT INCLUDED
length60.0 MILLIMETERS NOMINAL MM
diameter0.938 INCHES NOMINAL IN
materialCERAMIC OR GLASS ENCLOSURE
flute_typeINTEGRAL
head_styleFILLISTER COUNTERSUNK
point_typeCONVENTIONAL
shank_typeMORSE TAPER
point_angle118.0 DEGREES NOMINAL
reamer_typeFLUTED CHUCKING
shank_styleSTRAIGHT ROUND
flute_designSPIRAL
NSN5330-00-171-5672
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 20-660 MFR: Exost ⚠ 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
•
APERTURE DIAMETER: 0.558 INCHES NOMINAL IN
•
CROSS-SECTIONAL THICKNESS: 0.082 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: METAL
•
STYLE DESIGNATOR: CIRCULAR
•
MATERIAL: COPPER OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: MS 2899 FSCM 86403 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
OUTSIDE DIAMETER: 0.716 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
APERTURE DIAMETER0.558 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.082 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEMETAL
STYLE DESIGNATORCIRCULAR
MATERIALCOPPER OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMS 2899 FSCM 86403 MFR REF SINGLE MATERIAL RESPONSE OVERALL
OUTSIDE DIAMETER0.716 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
11383Interchangeable
interchangeable cross-reference
interchangeable
GGG-D-751 TYCSZ56Interchangeable
interchangeable cross-reference
interchangeable
B94.11MInterchangeable
interchangeable cross-reference
interchangeable
30460Interchangeable
interchangeable cross-reference
interchangeable
4025-0937Interchangeable
interchangeable cross-reference
interchangeable
21352Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20-660?
20-660 is a SEMICONDUCTOR DEVICES,UNITIZED manufactured by Exost.
What parts can replace 20-660?
There are 19 known substitutes for 20-660: 11383, GGG-D-751 TYCSZ56, B94.11M and 16 more. Substitute compatibility should be verified for your specific system.
Is 20-660 still available?
20-660 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026