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Technical Data Sheet
A18156 ✓ 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 BUMPER is a the manufacturer industrial component. Key specifications include color: BLACK, material: RUBBER SYNTHETIC, hole_diameter: 0.188 INCHES NOMINAL IN, overall_height: 0.563 INCHES NOMINAL IN, special_features: FURNISHED W/STEEL WASHER, style_designator: FLAT TOP COUNTERBORED. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-291-3650, 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
A18156
NSN: 5340-00-291-3650
FSC: 5340
CAGE: 03829 — GENERAL SCIENTIFIC CORP DBA SURGITEL (USA)
SPECIFICATIONS
colorBLACK
materialRUBBER SYNTHETIC
hole_diameter0.188 INCHES NOMINAL IN
overall_height0.563 INCHES NOMINAL IN
special_featuresFURNISHED W/STEEL WASHER
style_designatorFLAT TOP COUNTERBORED
first_counterbore_depth0.250 INCHES NOMINAL IN
material_hardness_rating55.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM
first_counterbore_diameter0.375 INCHES NOMINAL IN
outside/top_flange_diameter0.750 INCHES NOMINAL IN
NSN5340-00-291-3650
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A18156 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
FIRST COUNTERBORE DIAMETER: 0.375 INCHES NOMINAL IN
COLOR: BLACK
HOLE DIAMETER: 0.188 INCHES NOMINAL IN
MATERIAL HARDNESS RATING: 55.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM
FIRST COUNTERBORE DEPTH: 0.250 INCHES NOMINAL IN
OUTSIDE/TOP FLANGE DIAMETER: 0.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
FIRST COUNTERBORE DIAMETER0.375 INCHES NOMINAL IN
SPECIAL FEATURESFURNISHED W/STEEL WASHER
OVERALL HEIGHT0.563 INCHES NOMINAL IN
COLORBLACK
HOLE DIAMETER0.188 INCHES NOMINAL IN
MATERIAL HARDNESS RATING55.0 SHORE DUROMETER A MINIMUM AND 75.0 SHORE DUROMETER A MAXIMUM
FIRST COUNTERBORE DEPTH0.250 INCHES NOMINAL IN
OUTSIDE/TOP FLANGE DIAMETER0.750 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC
STYLE DESIGNATORFLAT TOP COUNTERBORED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
MS90726-34Upgraded Successor
successor cross-reference
successor
3537Upgraded Successor
successor cross-reference
successor
70008-34Upgraded Successor
successor cross-reference
successor
18Upgraded Successor
successor cross-reference
successor
3F3049Interchangeable
interchangeable cross-reference
interchangeable
593Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A18156?
A18156 is a BUMPER.
What parts can replace A18156?
There are 27 known substitutes for A18156: MS90726-34, 3537, 70008-34 and 24 more. Substitute compatibility should be verified for your specific system.
Is A18156 still available?
A18156 is currently cancelled.
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