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Technical Data Sheet
PartsTable / COMPONENT / 7B7728
7B7728 ✓ 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 STANDOFF,THREADED,SPACING is a the manufacturer industrial component. Key specifications include length: 5.750 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING STANDOFF, thread_class: 3B LEFT INTERNAL (INCLUDES THRU THREAD), thread_length: 1.188 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN, flange_diameter: 0.809 INCHES NOMINAL IN, flange_thickness: 0.500 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 5340-00-424-0256, 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
7B7728
NSN: 5340-00-424-0256
FSC: 5340
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
length5.750 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING STANDOFF
thread_class3B LEFT INTERNAL (INCLUDES THRU THREAD)
thread_length1.188 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
flange_diameter0.809 INCHES NOMINAL IN
flange_thickness0.500 INCHES NOMINAL IN
style_designatorFLANGED WITH LEFT INTERNAL THREAD
thread_directionRIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD)
surface_treatmentPASSIVATE STANDOFF
nominal_thread_size0.750 INCHES RIGHT EXTERNAL IN
thread_pitch_diameters+0.7094 TO 0.7120 INCHES RIGHT EXTERNAL IN
thread_quantity_per_inch16 RIGHT EXTERNAL
NSN5340-00-424-0256
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 7B7728 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
•
THREAD DIRECTION: RIGHT-HAND RIGHT EXTERNAL
•
MATERIAL: STEEL CORROSION RESISTING STANDOFF
•
FLANGE THICKNESS: 0.500 INCHES NOMINAL IN
•
THREAD SERIES DESIGNATOR: UNS RIGHT EXTERNAL
•
STYLE DESIGNATOR: FLANGED WITH LEFT INTERNAL THREAD
•
SURFACE TREATMENT: PASSIVATE STANDOFF
•
THREAD LENGTH: 0.437 INCHES MAXIMUM RIGHT EXTERNAL IN
•
LENGTH: 5.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND RIGHT EXTERNAL
MATERIALSTEEL CORROSION RESISTING STANDOFF
FLANGE THICKNESS0.500 INCHES NOMINAL IN
THREAD SERIES DESIGNATORUNS RIGHT EXTERNAL
STYLE DESIGNATORFLANGED WITH LEFT INTERNAL THREAD
SURFACE TREATMENTPASSIVATE STANDOFF
THREAD LENGTH0.437 INCHES MAXIMUM RIGHT EXTERNAL IN
LENGTH5.750 INCHES NOMINAL IN
THREAD PITCH DIAMETERS+0.7094 TO 0.7120 INCHES RIGHT EXTERNAL IN
THREAD QUANTITY PER INCH16 RIGHT EXTERNAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
C12293Interchangeable
interchangeable cross-reference
interchangeable
2410 1-3/8Interchangeable
interchangeable cross-reference
interchangeable
110 1-3/8Interchangeable
interchangeable cross-reference
interchangeable
716718-2Interchangeable
interchangeable cross-reference
interchangeable
2519-2Interchangeable
interchangeable cross-reference
interchangeable
2-174N219-7Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 7B7728?
7B7728 is a STANDOFF,THREADED,SPACING.
What parts can replace 7B7728?
There are 11 known substitutes for 7B7728: C12293, 2410 1-3/8, 110 1-3/8 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 7B7728?
7B7728 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-424-0256. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026