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40691A ✓ 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 RETAINER,PACKING is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, surface_treatment: ANODIZE OVERALL, material_document_and_classification: QQ-A-225/6 T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL, surface_treatment_document_and_classification: MIL-A-8625 TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-145-1376, 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
40691A
NSN: 5330-00-145-1376
FSC: 5330
CAGE: 28265 — HERCULES ENGINE CO INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
surface_treatmentANODIZE OVERALL
material_document_and_classificationQQ-A-225/6 T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
surface_treatment_document_and_classificationMIL-A-8625 TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5330-00-145-1376
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 40691A 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
•
HOLE DIAMETER: 0.531 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
BOLT HOLE QUANTITY: 4
•
MATERIAL DOCUMENT AND CLASSIFICATION: HH-P-96,TYPE 1 FED STD ALL MATERIAL RESPONSES OVERALL
•
MATERIAL: PAPER AND GLUE AND GLYCERIN OVERALL
•
CROSS-SECTIONAL THICKNESS: 0.031 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER0.531 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
BOLT HOLE QUANTITY4
MATERIAL DOCUMENT AND CLASSIFICATIONHH-P-96,TYPE 1 FED STD ALL MATERIAL RESPONSES OVERALL
MATERIALPAPER AND GLUE AND GLYCERIN OVERALL
OVERALL WIDTH6.281 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.031 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
Q67000A125ZInterchangeable
interchangeable cross-reference
interchangeable
CA3005Interchangeable
interchangeable cross-reference
interchangeable
8219B0632-3Interchangeable
interchangeable cross-reference
interchangeable
NAS1786B06-14Interchangeable
interchangeable cross-reference
interchangeable
8845Interchangeable
interchangeable cross-reference
interchangeable
40691AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 40691A?
40691A is a RETAINER,PACKING.
What parts can replace 40691A?
There are 19 known substitutes for 40691A: Q67000A125Z, CA3005, 8219B0632-3 and 16 more. Substitute compatibility should be verified for your specific system.
Is 40691A still available?
40691A 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