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GB505C1W — BUMPER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

GB505C1W: BUMPER.

The BUMPER is a the manufacturer industrial component. Key specifications include material: RUBBER, hole_diameter: 0.188 INCHES NOMINAL IN, overall_height: 0.625 INCHES NOMINAL IN, special_features: INCLUDES MOLDED IN WASHER, style_designator: PAN TOP COUNTERBORED, first_counterbore_depth: 0.344 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-144-9702, 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
GB505C1W
NSN: 5340-01-144-9702
FSC: 5340 — Hardware, Commercial
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialRUBBER
hole_diameter0.188 INCHES NOMINAL IN
overall_height0.625 INCHES NOMINAL IN
special_featuresINCLUDES MOLDED IN WASHER
style_designatorPAN TOP COUNTERBORED
first_counterbore_depth0.344 INCHES NOMINAL IN
first_counterbore_diameter0.500 INCHES NOMINAL IN
outside/top_flange_diameter1.500 INCHES NOMINAL IN
NSN5340-01-144-9702
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: GB505C1W 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
•
OUTSIDE/TOP FLANGE DIAMETER: 1.500 INCHES NOMINAL IN
•
FIRST COUNTERBORE DIAMETER: 0.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PAN TOP COUNTERBORED
•
FIRST COUNTERBORE DEPTH: 0.344 INCHES NOMINAL IN
•
MATERIAL: RUBBER
•
HOLE DIAMETER: 0.188 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.625 INCHES NOMINAL IN
OUTSIDE/TOP FLANGE DIAMETER1.500 INCHES NOMINAL IN
FIRST COUNTERBORE DIAMETER0.500 INCHES NOMINAL IN
STYLE DESIGNATORPAN TOP COUNTERBORED
FIRST COUNTERBORE DEPTH0.344 INCHES NOMINAL IN
SPECIAL FEATURESINCLUDES MOLDED IN WASHER
MATERIALRUBBER
HOLE DIAMETER0.188 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 1
68A4-C115-2Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is GB505C1W?
GB505C1W is a BUMPER.
What parts can replace GB505C1W?
There is 1 known substitute for GB505C1W: 68A4-C115-2. Substitute compatibility should be verified for your specific system.
What is the NSN for GB505C1W?
GB505C1W is cataloged in the U.S. Government catalog under NSN 5340-01-144-9702. 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.