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Technical Data Sheet
GB505R1 ✓ 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: PLASTIC, POLYETHYLENE (PP), overall_height: 0.438 INCHES NOMINAL IN, fastening_device_size: NO. 6 SIZE BINDER HEAD SCREW, fastening_device_type: MACHINE SCREW, outside/top_flange_diameter: 0.750 INCHES NOMINAL IN.

This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-057-4654, 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
GB505R1
NSN: 5340-01-057-4654
FSC: 5340
CAGE: 26512 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
colorBLACK
materialPLASTIC, POLYETHYLENE (PP)
overall_height0.438 INCHES NOMINAL IN
fastening_device_sizeNO. 6 SIZE BINDER HEAD SCREW
fastening_device_typeMACHINE SCREW
outside/top_flange_diameter0.750 INCHES NOMINAL IN
NSN5340-01-057-4654
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: GB505R1 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: 0.750 INCHES NOMINAL IN
FASTENING DEVICE SIZE: NO. 6 SIZE BINDER HEAD SCREW
FASTENING DEVICE TYPE: MACHINE SCREW
COLOR: BLACK
MATERIAL: PLASTIC, POLYETHYLENE (PP)
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE/TOP FLANGE DIAMETER0.750 INCHES NOMINAL IN
FASTENING DEVICE SIZENO. 6 SIZE BINDER HEAD SCREW
FASTENING DEVICE TYPEMACHINE SCREW
COLORBLACK
MATERIALPLASTIC, POLYETHYLENE (PP)
OVERALL HEIGHT0.438 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
TM-BC 557Upgraded Successor
successor cross-reference
successor
10-2531Upgraded Successor
successor cross-reference
successor
SU1811Upgraded Successor
successor cross-reference
successor
2182Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GB505R1?
GB505R1 is a BUMPER.
What parts can replace GB505R1?
There are 4 known substitutes for GB505R1: TM-BC 557, 10-2531, SU1811 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GB505R1?
GB505R1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-057-4654. This indicates validated use in U.S. government and defense supply chains.
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