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Technical Data Sheet
PartsTable / COMPONENT / MS27961-4
MS27961-4 ✓ 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 HINGE,BUTT is a the manufacturer industrial component. Key specifications include material: UNABLE TO DECODE, body_width: 4.000 INCHES NOMINAL IN, rising_pin: NOT INCLUDED, knuckle_type: FRICTION, performance_type: NOT RATED, pin_removability: REMOVABLE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-229-4360, 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
MS27961-4
NSN: 5340-00-229-4360
FSC: 5340
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialUNABLE TO DECODE
body_width4.000 INCHES NOMINAL IN
rising_pinNOT INCLUDED
knuckle_typeFRICTION
knuckle_quantity5
performance_typeNOT RATED
pin_removabilityREMOVABLE
style_designatorBUTT
surface_treatmentUNABLE TO DECODE
material_thickness0.130 INCHES NOMINAL IN
reversible_featureNOT INCLUDED
hinge_mounting_typeFULL MORTISE
NSN5340-00-229-4360
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS27961-4 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
•
KNUCKLE QUANTITY: 5
•
PERFORMANCE TYPE: NOT RATED
•
MOUNTING HOLE QUANTITY: 6
•
MATERIAL THICKNESS: 0.130 INCHES NOMINAL IN
•
MATERIAL: UNABLE TO DECODE
•
SURFACE TREATMENT: UNABLE TO DECODE
•
STYLE DESIGNATOR: BUTT
TECHNICAL CHARACTERISTICS (FLIS)
HINGE MOUNTING TYPEFULL MORTISE
KNUCKLE QUANTITY5
PERFORMANCE TYPENOT RATED
MOUNTING HOLE QUANTITY6
MATERIAL THICKNESS0.130 INCHES NOMINAL IN
MATERIALUNABLE TO DECODE
SURFACE TREATMENTUNABLE TO DECODE
STYLE DESIGNATORBUTT
RISING PINNOT INCLUDED
MOUNTING HOLE DIAMETER0.193 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
FFH116BAMEND2TYPE2027Upgraded Successor
successor cross-reference
successor
A156.1-A8112Upgraded Successor
successor cross-reference
successor
FFH116CTYPE2170Upgraded Successor
successor cross-reference
successor
FFH116TYPE2170Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS27961-4?
MS27961-4 is a HINGE,BUTT.
What parts can replace MS27961-4?
There are 4 known substitutes for MS27961-4: FFH116BAMEND2TYPE2027, A156.1-A8112, FFH116CTYPE2170 and 1 more. Substitute compatibility should be verified for your specific system.
Is MS27961-4 still available?
MS27961-4 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