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Technical Data Sheet
PartsTable / COMPONENT / BHMA-A156.20 A81313 1-1/4IN
BHMA-A156.20 A81313 1-1/4IN ✓ 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 BHMA-A156.20 A81313 1-1/4IN is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-663-1477, 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
BHMA-A156.20 A81313 1-1/4IN
NSN: 5340-00-663-1477
FSC: 5340
CAGE: 41280 — BUILDERS HARDWARE MFRS ASSN INC (USA)
SPECIFICATIONS
Part NumberBHMA-A156.20 A81313 1-1/4IN
NSN5340-00-663-1477
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: BHMA-A156.20 A81313 1-1/4IN 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
•
HINGE MOUNTING TYPE: FULL MORTISE
•
MOUNTING HOLE QUANTITY: 6
•
KNUCKLE QUANTITY: 5
•
MATERIAL THICKNESS: 0.089 INCHES NOMINAL IN
•
PIN CENTER TO BODY EDGE DISTANCE: 1.250 INCHES NOMINAL IN
•
REVERSIBLE FEATURE: NOT INCLUDED
•
RISING PIN: NOT INCLUDED
•
PERFORMANCE TYPE: REGULAR DUTY
TECHNICAL CHARACTERISTICS (FLIS)
HINGE MOUNTING TYPEFULL MORTISE
MOUNTING HOLE QUANTITY6
KNUCKLE QUANTITY5
MATERIAL THICKNESS0.089 INCHES NOMINAL IN
PIN CENTER TO BODY EDGE DISTANCE1.250 INCHES NOMINAL IN
REVERSIBLE FEATURENOT INCLUDED
RISING PINNOT INCLUDED
PERFORMANCE TYPEREGULAR DUTY
BODY WIDTH2.500 INCHES NOMINAL IN
PIN TIP STYLEFLAT BUTTON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
BHMA-A156.20Upgraded Successor
successor cross-reference
successor
MS27970-26Upgraded Successor
successor cross-reference
successor
FFH116Upgraded Successor
successor cross-reference
successor
BHMA-A156.1 A8133 3-1/2INUpgraded Successor
successor cross-reference
successor
A8133Upgraded Successor
successor cross-reference
successor
ANSI A156.1 A8133Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BHMA-A156.20 A81313 1-1/4IN?
BHMA-A156.20 A81313 1-1/4IN is a BHMA-A156.20 A81313 1-1/4IN.
What parts can replace BHMA-A156.20 A81313 1-1/4IN?
There are 19 known substitutes for BHMA-A156.20 A81313 1-1/4IN: BHMA-A156.20, MS27970-26, FFH116 and 16 more. Substitute compatibility should be verified for your specific system.
Is BHMA-A156.20 A81313 1-1/4IN still available?
BHMA-A156.20 A81313 1-1/4IN 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