PartsTable
Technical Data Sheet
28721 ✓ Verified by PartsTable
Hama · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

- Functional photo/video case for medium-sized digital cameras and camcorders<br>- Diagonal and continuous zip opening for better access<br>- Front pocket with integrated zipped compartment<br>- Inner divider, variably adjustable by hook & loop fastener<br>- Adjustable length of shoulder strap<br>- Handle<br>- Material: polytex<br>- Colour: black This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-285-8385, 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
28721
NSN: 5330-00-285-8385
FSC: 5330
CAGE: 81076 — JOHNSON C S CO INC (USA)
SPECIFICATIONS
phaseSINGLE
materialPLASTIC POLYTETRAFLUOROETHYLENE FLOW CONTROL DEVICE
connection_typeTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN,OPTIONAL END(PIPE) ALL ENDS
style_designatorSTRAIGHT THRU Y-PATTERN
thread_directionRIGHT-HAND ALL ENDS
aperture_diameter0.375 INCHES NOMINAL IN
mounting_positionHORIZONTAL OR VERTICAL
frequency_in_hertz60.0
operating_pressure125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
flow_control_deviceDISK
nominal_thread_size0.375 INCHES ALL ENDS IN
NSN5330-00-285-8385
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 28721 MFR: Hama ⚠ 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
HOUSING BORE DIAMETER: 2.875 INCHES NOMINAL IN
ACCOMMODATED SHAFT DIAMETER: 2.000 INCHES NOMINAL IN
SEALING ELEMENT STYLE: ANGULAR
MATERIAL: LEATHER OR RUBBER SYNTHETIC SEALING ELEMENT
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 2000 FEET PER MINUTE FT
CASE STYLE: SQUARE
SEAL WIDTH: 0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
HOUSING BORE DIAMETER2.875 INCHES NOMINAL IN
ACCOMMODATED SHAFT DIAMETER2.000 INCHES NOMINAL IN
SEALING ELEMENT STYLEANGULAR
MATERIALLEATHER OR RUBBER SYNTHETIC SEALING ELEMENT
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE FT
CASE STYLESQUARE
SEAL WIDTH0.469 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 27
2872Interchangeable
interchangeable cross-reference
interchangeable
AN526C1032R12Interchangeable
interchangeable cross-reference
interchangeable
4912534-02Interchangeable
interchangeable cross-reference
interchangeable
1710896-57Interchangeable
interchangeable cross-reference
interchangeable
80547Interchangeable
interchangeable cross-reference
interchangeable
8M4621Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 28721?
28721 is a 28721 manufactured by Hama.
What parts can replace 28721?
There are 27 known substitutes for 28721: 2872, AN526C1032R12, 4912534-02 and 24 more. Substitute compatibility should be verified for your specific system.
Is 28721 still available?
28721 is currently cancelled.
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