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S278SSH26 — STRAP,RETAINING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

S278SSH26: STRAP,RETAINING.

The STRAP,RETAINING is a the manufacturer industrial component. Key specifications include cushion: INCLUDED, material: STEEL COMP 304 BONDING STRIP, mounting_pad: INCLUDED, overall_width: 0.750 INCHES NOMINAL IN, overall_length: 3.190 INCHES NOMINAL IN, style_designator: SADDLE ARCH. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-444-8385, 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
S278SSH26
NSN: 5340-01-444-8385
FSC: 5340 — Hardware, Commercial
CAGE: 18076 — UMPCO, INC. DBA UMPCO INC (USA)
SPECIFICATIONS
cushionINCLUDED
materialSTEEL COMP 304 BONDING STRIP
mounting_padINCLUDED
overall_width0.750 INCHES NOMINAL IN
overall_length3.190 INCHES NOMINAL IN
style_designatorSADDLE ARCH
surface_treatmentPASSIVATE
material_thickness0.050 INCHES NOMINAL IN
mounting_hole_size0.197 INCHES NOMINAL IN
inside_diameter/arch_length1.750 INCHES NOMINAL IN
material_document_and_classificationTA79, TA MFG CO MFR REF SINGLE MATERIAL RESPONSE CUSHIONING
distance_between_mounting_hole_centers2.690 INCHES NOMINAL IN
NSN5340-01-444-8385
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: S278SSH26 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
•
MOUNTING HOLE SIZE: 0.197 INCHES NOMINAL IN
•
DISTANCE BETWEEN MOUNTING HOLE CENTERS: 2.690 INCHES NOMINAL IN
•
MOUNTING PAD: INCLUDED
•
STYLE DESIGNATOR: SADDLE ARCH
•
MATERIAL DOCUMENT AND CLASSIFICATION: AMS 5513 ASSN STD SINGLE MATERIAL RESPONSE BONDING STRIP
TECHNICAL CHARACTERISTICS
MOUNTING HOLE SIZE0.197 INCHES NOMINAL IN
DISTANCE BETWEEN MOUNTING HOLE CENTERS2.690 INCHES NOMINAL IN
MOUNTING PADINCLUDED
STYLE DESIGNATORSADDLE ARCH
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5513 ASSN STD SINGLE MATERIAL RESPONSE BONDING STRIP
MATERIAL DOCUMENT AND CLASSIFICATIONTA79, TA MFG CO MFR REF SINGLE MATERIAL RESPONSE CUSHIONING
OVERALL LENGTH3.190 INCHES NOMINAL IN
OVERALL WIDTH0.750 INCHES NOMINAL IN
MATERIAL THICKNESS0.050 INCHES NOMINAL IN
CUSHIONINCLUDED
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
9D0018C026HRSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is S278SSH26?
S278SSH26 is a STRAP,RETAINING.
What parts can replace S278SSH26?
There is 1 known substitute for S278SSH26: 9D0018C026HR. Substitute compatibility should be verified for your specific system.
What is the NSN for S278SSH26?
S278SSH26 is cataloged in the U.S. Government catalog under NSN 5340-01-444-8385. 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.