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P-20-139 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

P-20-139: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, hole_diameter: 0.125 INCHES NOMINAL IN, body_thickness: 0.188 INCHES NOMINAL IN, inside_diameter: 1.500 INCHES NOMINAL IN, flange_thickness: 0.312 INCHES NOMINAL IN, outside_diameter: 2.484 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-057-4141, 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
P-20-139
NSN: 5340-01-057-4141
FSC: 5340 — Hardware, Commercial
CAGE: D9182 — ZF INDUSTRIEANTRIEBE WITTEN GMBH (DEU)
SPECIFICATIONS
materialCOPPER ALLOY
hole_diameter0.125 INCHES NOMINAL IN
body_thickness0.188 INCHES NOMINAL IN
inside_diameter1.500 INCHES NOMINAL IN
flange_thickness0.312 INCHES NOMINAL IN
outside_diameter2.484 INCHES NOMINAL IN
features_providedSEALING CAPABILITY
securing_device_typeTHREADED FASTENER
peripheral_shape_styleROUND, ONE HOLE
first_recess_inside_height1.562 INCHES NOMINAL IN
cross-sectional_shape_styleCIRCULAR RECESS
mounting_opening_shape_styleUNTHREADED HOLE
NSN5340-01-057-4141
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: P-20-139 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
•
FLANGE THICKNESS: 0.312 INCHES NOMINAL IN
•
FIRST RECESS INSIDE HEIGHT: 1.562 INCHES NOMINAL IN
•
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
•
CROSS-SECTIONAL SHAPE STYLE: CIRCULAR RECESS
•
OUTSIDE DIAMETER: 2.484 INCHES NOMINAL IN
•
BOLT HOLE CENTERLINE TO NEAREST EDGE DISTANCE: 1.242 INCHES NOMINAL IN
•
FEATURES PROVIDED: SEALING CAPABILITY
•
SECURING DEVICE TYPE: THREADED FASTENER
TECHNICAL CHARACTERISTICS
FLANGE THICKNESS0.312 INCHES NOMINAL IN
FIRST RECESS INSIDE HEIGHT1.562 INCHES NOMINAL IN
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
CROSS-SECTIONAL SHAPE STYLECIRCULAR RECESS
OUTSIDE DIAMETER2.484 INCHES NOMINAL IN
BOLT HOLE CENTERLINE TO NEAREST EDGE DISTANCE1.242 INCHES NOMINAL IN
FEATURES PROVIDEDSEALING CAPABILITY
SECURING DEVICE TYPETHREADED FASTENER
INSIDE DIAMETER1.500 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND, ONE HOLE
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
DK-PN-33Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is P-20-139?
P-20-139 is a COVER,ACCESS.
What parts can replace P-20-139?
There is 1 known substitute for P-20-139: DK-PN-33. Substitute compatibility should be verified for your specific system.
What is the NSN for P-20-139?
P-20-139 is cataloged in the U.S. Government catalog under NSN 5340-01-057-4141. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.