PartsTable
Technical Data Sheet
BHMA-A156.20 A81221 12IN ✓ 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 A81221 12IN is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-240-2580, 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 A81221 12IN
NSN: 5340-00-240-2580
FSC: 5340
CAGE: 41280 — BUILDERS HARDWARE MFRS ASSN INC (USA)
SPECIFICATIONS
Part NumberBHMA-A156.20 A81221 12IN
NSN5340-00-240-2580
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: BHMA-A156.20 A81221 12IN 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 DOCUMENT AND CLASSIFICATION: QQ-B-626, COMP 11 FED SPEC SINGLE MATERIAL RESPONSE AND FED STD 66, COMP 302, 303, OR 304 FED STD SINGLE MATERIAL RESPONSE PIN
MOUNTING HOLE QUANTITY: 6
SURFACE TREATMENT: ZINC BODY
MATERIAL: COPPER ALLOY AND STEEL CORROSION RESISTING PIN
REVERSIBLE FEATURE: NOT INCLUDED
STYLE DESIGNATOR: STRAP
KNUCKLE QUANTITY: 3
PERFORMANCE TYPE: NOT RATED
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-626, COMP 11 FED SPEC SINGLE MATERIAL RESPONSE AND FED STD 66, COMP 302, 303, OR 304 FED STD SINGLE MATERIAL RESPONSE PIN
MOUNTING HOLE QUANTITY6
SURFACE TREATMENTZINC BODY
MATERIALCOPPER ALLOY AND STEEL CORROSION RESISTING PIN
REVERSIBLE FEATURENOT INCLUDED
STYLE DESIGNATORSTRAP
KNUCKLE QUANTITY3
PERFORMANCE TYPENOT RATED
PIN CENTER TO BODY EDGE DISTANCE12.000 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM A153 ASSN STD SINGLE TREATMENT RESPONSE BODY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
SC922Upgraded Successor
successor cross-reference
successor
FFH116Upgraded Successor
successor cross-reference
successor
ANSI/ BHMA A156.20- A81221Upgraded Successor
successor cross-reference
successor
BHMA-A156.20Interchangeable
interchangeable cross-reference
interchangeable
SC928Interchangeable
interchangeable cross-reference
interchangeable
MS27970-12Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BHMA-A156.20 A81221 12IN?
BHMA-A156.20 A81221 12IN is a BHMA-A156.20 A81221 12IN.
What parts can replace BHMA-A156.20 A81221 12IN?
There are 22 known substitutes for BHMA-A156.20 A81221 12IN: SC922, FFH116, ANSI/ BHMA A156.20- A81221 and 19 more. Substitute compatibility should be verified for your specific system.
Is BHMA-A156.20 A81221 12IN still available?
BHMA-A156.20 A81221 12IN is currently cancelled.
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