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Technical Data Sheet
B19939 ✓ 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 COVER,ACCESS is a the manufacturer industrial component. Key specifications include material: IRON CAST, hole_diameter: 0.406 INCHES NOMINAL IN, body_thickness: 0.312 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN, outside_diameter: 6.433 INCHES NOMINAL IN, special_features: 7/8-9 UNC TAP THROUGH CENTER OF COVER,0.282 IN. W BY 0.062 IN.

DEEP BY 1.938 IN. OD GROVE CENTERED IN. COVER IN, bolt_circle_diameter: 5.625 INCHES NOMINAL IN.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-374-7335, 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
B19939
NSN: 5340-00-374-7335
FSC: 5340
CAGE: 16004 — DAVEY COMPRESSOR CO DIV OF KECO INDUSTRIES INC (USA)
SPECIFICATIONS
materialIRON CAST
hole_diameter0.406 INCHES NOMINAL IN
body_thickness0.312 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
outside_diameter6.433 INCHES NOMINAL IN
special_features7/8-9 UNC TAP THROUGH CENTER OF COVER,0.282 IN. W BY 0.062 IN. DEEP BY 1.938 IN. OD GROVE CENTERED IN. COVER IN
bolt_circle_diameter5.625 INCHES NOMINAL IN
securing_device_typeTHREADED FASTENER
peripheral_shape_styleROUND, MULTI HOLES
bolt_circle_hole_quantity6
cross-sectional_shape_styleFLAT
mounting_opening_shape_styleUNTHREADED HOLE
NSN5340-00-374-7335
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: B19939 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
HOLE DIAMETER: 0.406 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLE: FLAT
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
PERIPHERAL SHAPE STYLE: ROUND, MULTI HOLES
SECURING DEVICE TYPE: THREADED FASTENER
OUTSIDE DIAMETER: 6.433 INCHES NOMINAL IN
MATERIAL: IRON CAST
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER0.406 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEFLAT
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
PERIPHERAL SHAPE STYLEROUND, MULTI HOLES
SECURING DEVICE TYPETHREADED FASTENER
OUTSIDE DIAMETER6.433 INCHES NOMINAL IN
SPECIAL FEATURES7/8-9 UNC TAP THROUGH CENTER OF COVER,0.282 IN. W BY 0.062 IN. DEEP BY 1.938 IN. OD GROVE CENTERED IN. COVER IN
MATERIALIRON CAST
BOLT CIRCLE DIAMETER5.625 INCHES NOMINAL IN
BODY THICKNESS0.312 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
19939Interchangeable
interchangeable cross-reference
interchangeable
19939-9DIGInterchangeable
interchangeable cross-reference
interchangeable
H5582Interchangeable
interchangeable cross-reference
interchangeable
48-15021Interchangeable
interchangeable cross-reference
interchangeable
EW7197Interchangeable
interchangeable cross-reference
interchangeable
17512Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B19939?
B19939 is a COVER,ACCESS.
What parts can replace B19939?
There are 17 known substitutes for B19939: 19939, 19939-9DIG, H5582 and 14 more. Substitute compatibility should be verified for your specific system.
Is B19939 still available?
B19939 is currently cancelled.
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