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Technical Data Sheet
PartsTable / COMPONENT / ANSI/BHMA A156.20
ANSI/BHMA 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/BHMA A156.20 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-240-2581, 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/BHMA A156.20
NSN: 5340-00-240-2581
FSC: 5340
CAGE: 80204 — AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED DBA AMERICAN NATIONAL STANDARDS INSTITUTE (USA)
SPECIFICATIONS
Part NumberANSI/BHMA A156.20
NSN5340-00-240-2581
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: ANSI/BHMA 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
•
PIN CENTER TO BODY EDGE DISTANCE: 6.000 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.092 INCHES MINIMUM IN
•
KNUCKLE TYPE: FRICTION
•
KNUCKLE QUANTITY: 3
•
MOUNTING HOLE DIAMETER: 0.169 INCHES NOMINAL IN
•
MATERIAL: COPPER ALLOY PIN
•
STYLE DESIGNATOR: STRAP
•
COATING METHOD: ELECTROPLATED BODY
TECHNICAL CHARACTERISTICS (FLIS)
PIN CENTER TO BODY EDGE DISTANCE6.000 INCHES NOMINAL IN
MATERIAL THICKNESS0.092 INCHES MINIMUM IN
KNUCKLE TYPEFRICTION
KNUCKLE QUANTITY3
MOUNTING HOLE DIAMETER0.169 INCHES NOMINAL IN
MATERIALCOPPER ALLOY PIN
STYLE DESIGNATORSTRAP
COATING METHODELECTROPLATED BODY
PERFORMANCE TYPEHEAVY DUTY
BODY WIDTH2.250 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
1305Upgraded Successor
successor cross-reference
successor
MILB36225Upgraded Successor
successor cross-reference
successor
IDENTABAND400Upgraded Successor
successor cross-reference
successor
A10050 PIECE 28Upgraded Successor
successor cross-reference
successor
FF-H-00116Interchangeable
interchangeable cross-reference
interchangeable
ANSI/BHMA A156.1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ANSI/BHMA A156.20?
ANSI/BHMA A156.20 is a ANSI/BHMA A156.20.
What parts can replace ANSI/BHMA A156.20?
There are 21 known substitutes for ANSI/BHMA A156.20: 1305, MILB36225, IDENTABAND400 and 18 more. Substitute compatibility should be verified for your specific system.
Is ANSI/BHMA A156.20 still available?
ANSI/BHMA A156.20 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