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S728 — COUPLING,PIPE

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

S728: COUPLING,PIPE.

The COUPLING,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 OVERALL, flange_shape: HEXAGON FIRST END, connection_type: UNTHREADED INTERNAL HOSE INLET, special_features: M SYLE PLUG,1/4"FEMALE 2/CD, style_designator: SCREWED, operating_pressure: 250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. This part is cataloged in the U.S.

Government catalog under NSN 5331-00-231-3261, 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
S728
NSN: 5331-00-231-3261
NIINs: 002313261, 012367187, 012367247, 012367248, 012367249, 012367331, 012367346, 016734316
FSC: 5331 — O-ring
CAGE: 73277 — HOUGHTON INTERNATIONAL INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 303 OVERALL
flange_shapeHEXAGON FIRST END
connection_typeUNTHREADED INTERNAL HOSE INLET
special_featuresM SYLE PLUG,1/4"FEMALE 2/CD
style_designatorSCREWED
operating_pressure250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
maximum_operating_temp250.0 FAHRENHEIT SINGLE RESPONSE DEGF
media_for_which_designedAIR SINGLE RESPONSE
nominal_outside_diameter0.250 INCHES INLET IN
thread_series_designatorNPT FIRST END
material_document_and_classificationMANUFACTUREDATASHEET MFR REF SINGLE MATERIAL RESPONSE OVERALL
nominal_outside_diameter_hose_accommodated0.250 INCHES FIRST END IN
NSN5331-00-231-3261
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: S728 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
•
TEMP RATING: -65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF
•
CROSS-SECTIONAL HEIGHT: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 1.465 INCHES MINIMUM AND 1.485 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
TECHNICAL CHARACTERISTICS
TEMP RATING-65.0 FAHRENHEIT AND 160.0 FAHRENHEIT DEGF
CROSS-SECTIONAL HEIGHT0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
CENTER HOLE DIAMETER1.465 INCHES MINIMUM AND 1.485 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
SUBSTITUTES & CROSS-REFERENCES 10
AN6227-28Reference document
Same NSN cross-reference
Reference document — Secondary reference
AN6227-28ESReference document
Same NSN cross-reference
Reference document — Secondary reference
SP3128PCSP3128Reference document
Same NSN cross-reference
Reference document — Secondary reference
B2258PCSP3128Reference document
Same NSN cross-reference
Reference document — Secondary reference
182MBJ1Reference document
Same NSN cross-reference
Reference document — Secondary reference
11K3336PC25AReference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Shelf-life managedAcquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is S728?
S728 is a COUPLING,PIPE.
What parts can replace S728?
There are 10 known substitutes for S728: AN6227-28, AN6227-28ES, SP3128PCSP3128 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S728?
S728 is cataloged in the U.S. Government catalog under NSN 5331-00-231-3261. This indicates validated use in U.S. government and defense supply chains.
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