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Technical Data Sheet
PartsTable / COMPONENT / 8526521
8526521 ✓ 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 STRAP,RETAINING is a the manufacturer industrial component. Key specifications include cushion: NOT INCLUDED, material: IRON MALLEABLE LOCATION NOT OTHERWISE SPECIFIED, mounting_pad: NOT INCLUDED, overall_width: 0.688 INCHES NOMINAL IN, overall_length: 2.563 INCHES NOMINAL IN, style_designator: HALF ARCH. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-582-7167, 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
8526521
NSN: 5340-00-582-7167
FSC: 5340
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
cushionNOT INCLUDED
materialIRON MALLEABLE LOCATION NOT OTHERWISE SPECIFIED
mounting_padNOT INCLUDED
overall_width0.688 INCHES NOMINAL IN
overall_length2.563 INCHES NOMINAL IN
style_designatorHALF ARCH
surface_treatmentZINC
material_thickness0.313 INCHES NOMINAL IN
mounting_hole_size0.281 INCHES NOMINAL IN
inside_diameter/arch_length1.050 INCHES NOMINAL IN
distance_between_base_and_inside_of_arch1.050 INCHES NOMINAL IN
center_to_center_distance_between_arch_and_mounting_hole1.219 INCHES NOMINAL IN
NSN5340-00-582-7167
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 8526521 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
•
STYLE DESIGNATOR: HALF ARCH
•
SURFACE TREATMENT: ZINC
•
MATERIAL: IRON MALLEABLE LOCATION NOT OTHERWISE SPECIFIED
•
DISTANCE BETWEEN BASE AND INSIDE OF ARCH: 1.050 INCHES NOMINAL IN
•
CENTER TO CENTER DISTANCE BETWEEN ARCH AND MOUNTING HOLE: 1.219 INCHES NOMINAL IN
•
MOUNTING HOLE SIZE: 0.281 INCHES NOMINAL IN
•
INSIDE DIAMETER/ARCH LENGTH: 1.050 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.313 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORHALF ARCH
SURFACE TREATMENTZINC
MATERIALIRON MALLEABLE LOCATION NOT OTHERWISE SPECIFIED
DISTANCE BETWEEN BASE AND INSIDE OF ARCH1.050 INCHES NOMINAL IN
CENTER TO CENTER DISTANCE BETWEEN ARCH AND MOUNTING HOLE1.219 INCHES NOMINAL IN
MOUNTING HOLE SIZE0.281 INCHES NOMINAL IN
INSIDE DIAMETER/ARCH LENGTH1.050 INCHES NOMINAL IN
MATERIAL THICKNESS0.313 INCHES NOMINAL IN
MOUNTING PADNOT INCLUDED
CUSHIONNOT INCLUDED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
1277Upgraded Successor
successor cross-reference
successor
388-3YELLOWInterchangeable
interchangeable cross-reference
interchangeable
G374921PC57Interchangeable
interchangeable cross-reference
interchangeable
D8425PC33Interchangeable
interchangeable cross-reference
interchangeable
D7974PC36Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-7560Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8526521?
8526521 is a STRAP,RETAINING.
What parts can replace 8526521?
There are 13 known substitutes for 8526521: 1277, 388-3YELLOW, G374921PC57 and 10 more. Substitute compatibility should be verified for your specific system.
Is 8526521 still available?
8526521 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026