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Technical Data Sheet
A-1561 ✓ 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

CONNECTOR,RECEPTACLE,ELECTRICAL. Key specifications include material: COTTON COVERING SINGLE COVERING MATERIAL, rising_pin: NOT INCLUDED, shell_type: SOLID, knuckle_type: FRICTION, overall_width: 0.562 INCHES NOMINAL IN, pin_tip_style: FLAT BUTTON. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-243-6191, 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
A-1561
NSN: 5340-00-243-6191
FSC: 5340
CAGE: 80204 — AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED DBA AMERICAN NATIONAL STANDARDS INSTITUTE (USA)
SPECIFICATIONS
materialCOTTON COVERING SINGLE COVERING MATERIAL
rising_pinNOT INCLUDED
shell_typeSOLID
knuckle_typeFRICTION
overall_width0.562 INCHES NOMINAL IN
pin_tip_styleFLAT BUTTON
overall_height0.010 INCHES NOMINAL IN
overall_length0.562 INCHES NOMINAL IN
knuckle_quantity5
overall_diameter1.688 INCHES NOMINAL IN
performance_typeREGULAR DUTY
pin_removabilityREMOVABLE
NSN5340-00-243-6191
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A-1561 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: UNABLE TO DECODE
REVERSIBLE FEATURE: NOT INCLUDED
PERFORMANCE TYPE: REGULAR DUTY
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: UNABLE TO DECODE
PIN TIP STYLE: FLAT BUTTON
PIN REMOVABILITY: REMOVABLE
RISING PIN: NOT INCLUDED
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALUNABLE TO DECODE
MATERIALUNABLE TO DECODE
REVERSIBLE FEATURENOT INCLUDED
PERFORMANCE TYPEREGULAR DUTY
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONUNABLE TO DECODE
PIN TIP STYLEFLAT BUTTON
PIN REMOVABILITYREMOVABLE
RISING PINNOT INCLUDED
KNUCKLE QUANTITY5
KNUCKLE TYPEFRICTION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
BHMA-A156.20Upgraded Successor
successor cross-reference
successor
MS27970-26Upgraded Successor
successor cross-reference
successor
FFH116Upgraded Successor
successor cross-reference
successor
BHMA-A156.1 A2133 3-1/2INUpgraded Successor
successor cross-reference
successor
ANSI A156.1 A2133Upgraded Successor
successor cross-reference
successor
01555Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A-1561?
A-1561 is a CONNECTOR,RECEPTACLE,ELECTRICAL.
What parts can replace A-1561?
There are 21 known substitutes for A-1561: BHMA-A156.20, MS27970-26, FFH116 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A-1561?
A-1561 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-243-6191. This indicates validated use in U.S. government and defense supply chains.
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