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PartsTable / COMPONENT / ANSI A156.20
ANSI A156.20 ✓ 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 ANSI A156.20 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-664-1667, 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
ANSI A156.20
NSN: 5340-00-664-1667
FSC: 5340
CAGE: 80204 — AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED DBA AMERICAN NATIONAL STANDARDS INSTITUTE (USA)
SPECIFICATIONS
Part NumberANSI A156.20
NSN5340-00-664-1667
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: ANSI A156.20 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
•
MATERIAL: STEEL BODY
•
STYLE DESIGNATOR: SINGLE SAFETY
•
KNUCKLE QUANTITY: 3
•
SLOTTED LEAF LENGTH: 4.500 INCHES NOMINAL IN
•
STAPLE STYLE: SAFETY ADJUSTABLE
•
FIXED LEAF LENGTH: 2.250 INCHES NOMINAL IN
•
LEAF WIDTH: 1.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL BODY
STYLE DESIGNATORSINGLE SAFETY
MATERIALSTEEL PIN
KNUCKLE QUANTITY3
SLOTTED LEAF LENGTH4.500 INCHES NOMINAL IN
STAPLE STYLESAFETY ADJUSTABLE
FIXED LEAF LENGTH2.250 INCHES NOMINAL IN
LEAF WIDTH1.500 INCHES NOMINAL IN
REVERSIBLE FEATURENOT INCLUDED
KNUCKLE TYPEFRICTION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
4629248 PC 103Upgraded Successor
successor cross-reference
successor
1800T4Upgraded Successor
successor cross-reference
successor
1800-1AUpgraded Successor
successor cross-reference
successor
FFH111-1212Upgraded Successor
successor cross-reference
successor
2904Upgraded Successor
successor cross-reference
successor
FF-H-111Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ANSI A156.20?
ANSI A156.20 is a ANSI A156.20.
What parts can replace ANSI A156.20?
There are 21 known substitutes for ANSI A156.20: 4629248 PC 103, 1800T4, 1800-1A and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ANSI A156.20?
ANSI A156.20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-664-1667. 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