PartsTable
Technical Data Sheet
MIL-P-20691 ✓ 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 PLUG,EXPANSION is a the manufacturer industrial component. Key specifications include radius: 0.219 INCHES NOMINAL IN, material: STEEL, outside_diameter: 0.248 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN, style_designator: CONCAVE, material_thickness: 0.027 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN, material_document_and_classification: 66, COMP 1008 THRU 1022 FED STD SINGLE MATERIAL RESPONSE. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-050-1589, 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
MIL-P-20691
NSN: 5340-00-050-1589
FSC: 5340
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
radius0.219 INCHES NOMINAL IN
materialSTEEL
outside_diameter0.248 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN
style_designatorCONCAVE
material_thickness0.027 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
material_document_and_classification66, COMP 1008 THRU 1022 FED STD SINGLE MATERIAL RESPONSE
NSN5340-00-050-1589
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MIL-P-20691 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
OUTSIDE DIAMETER: 0.498 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
STYLE DESIGNATOR: CONCAVE
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD SINGLE MATERIAL RESPONSE OR AISI C1008 THRU C1022 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1008 THRU 1022 ASSN STD SINGLE MATERIAL RESPONSE
MATERIAL THICKNESS: 0.065 INCHES NOMINAL IN
MATERIAL: STEEL
RADIUS: 0.531 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER0.498 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN
STYLE DESIGNATORCONCAVE
END ITEM IDENTIFICATIONSHOP EQUIPMENT, CONTACT MAINTENANCE, TRUCK MOUNTED,FIRE PUMPS,SAFEGUARD CLASS ARS,FORRESTAL CLASS CV,SUPPORT EQUIPMENT, B-1 AIRCRAFT,TRUCK, CARGO, 5-TON, 6X6, XLWB W/E,WASP CLASS LHD,AIRBORNE MOBILE DIR AIR SPT CTL (2ID),(02M JUL83)(AN/UYQ-3A),TARAWA CLASS LHA A
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD SINGLE MATERIAL RESPONSE OR AISI C1008 THRU C1022 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1008 THRU 1022 ASSN STD SINGLE MATERIAL RESPONSE
MATERIAL THICKNESS0.065 INCHES NOMINAL IN
MATERIALSTEEL
RADIUS0.531 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 33
0910007-4Interchangeable
interchangeable cross-reference
interchangeable
172570Interchangeable
interchangeable cross-reference
interchangeable
910007Interchangeable
interchangeable cross-reference
interchangeable
172576Interchangeable
interchangeable cross-reference
interchangeable
M23C3Interchangeable
interchangeable cross-reference
interchangeable
117924Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MIL-P-20691?
MIL-P-20691 is a PLUG,EXPANSION.
What parts can replace MIL-P-20691?
There are 33 known substitutes for MIL-P-20691: 0910007-4, 172570, 910007 and 30 more. Substitute compatibility should be verified for your specific system.
Is MIL-P-20691 still available?
MIL-P-20691 is currently cancelled.
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