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Technical Data Sheet
PartsTable / COMPONENT / BB179CM
BB179CM ✓ 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, knuckle_type: BALL BEARING, pin_tip_style: FLAT BUTTON, performance_type: MEDIUM DUTY, pin_removability: NONREMOVABLE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-240-0038, 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
BB179CM
NSN: 5340-00-240-0038
FSC: 5340
CAGE: 87541 — STANLEY HARDWARE CO INC (USA)
SPECIFICATIONS
materialUNABLE TO DECODE
body_width4.000 INCHES NOMINAL IN
knuckle_typeBALL BEARING
pin_tip_styleFLAT BUTTON
knuckle_quantity5
performance_typeMEDIUM DUTY
pin_removabilityNONREMOVABLE
style_designatorBUTT
surface_treatmentUNABLE TO DECODE
material_thickness0.130 INCHES NOMINAL IN
reversible_featureNOT INCLUDED
hinge_mounting_typeFULL MORTISE
NSN5340-00-240-0038
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: BB179CM 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
•
REVERSIBLE FEATURE: NOT INCLUDED
•
BODY WIDTH: 4.000 INCHES NOMINAL IN
•
MOUNTING HOLE QUANTITY: 8
•
PERFORMANCE TYPE: MEDIUM DUTY
•
PIN CENTER TO BODY EDGE DISTANCE: 2.000 INCHES NOMINAL IN
•
NONDEFINITIVE SPEC/STD DATA: TH2105 TYPE
•
PIN TIP STYLE: FLAT BUTTON
•
SURFACE TREATMENT: UNABLE TO DECODE
TECHNICAL CHARACTERISTICS (FLIS)
REVERSIBLE FEATURENOT INCLUDED
BODY WIDTH4.000 INCHES NOMINAL IN
MOUNTING HOLE QUANTITY8
PERFORMANCE TYPEMEDIUM DUTY
PIN CENTER TO BODY EDGE DISTANCE2.000 INCHES NOMINAL IN
NONDEFINITIVE SPEC/STD DATATH2105 TYPE
PIN TIP STYLEFLAT BUTTON
SURFACE TREATMENTUNABLE TO DECODE
HINGE MOUNTING TYPEFULL MORTISE
KNUCKLE TYPEBALL BEARING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
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 BB179CM?
BB179CM is a HINGE,BUTT.
What parts can replace BB179CM?
There are 20 known substitutes for BB179CM: BHMA-A156.20, MS27970-26, FFH116 and 17 more. Substitute compatibility should be verified for your specific system.
Is BB179CM still available?
BB179CM 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