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Technical Data Sheet
PartsTable / COMPONENT / RU-4
RU-4 ✓ 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 SANDBAG SET,CERVICAL,X-RAY is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-232-0109, 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
RU-4
NSN: 5340-00-232-0109
FSC: 5340
CAGE: 91636 — CURTIS INDUSTRIES INC (USA)
SPECIFICATIONS
special_featuresBRAND NAME DESCRIPTION RU-4 SEMI AUTOMATIC SILVER RECOVERY;ADDITIONAL ITEM INFORMATION 1-4 GAL/DAY, B & W FIXER;REQUIRED MINIMUM ORDER QUANTITY 1;REQUIRED MULTIPLE ORDER QUANTITY 1
NSN5340-00-232-0109
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: RU-4 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
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESBRASS OR NICKEL SILVER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
11PInterchangeable
interchangeable cross-reference
interchangeable
528AMInterchangeable
interchangeable cross-reference
interchangeable
55PInterchangeable
interchangeable cross-reference
interchangeable
1768PXInterchangeable
interchangeable cross-reference
interchangeable
A1117PInterchangeable
interchangeable cross-reference
interchangeable
P505NXSTDInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RU-4?
RU-4 is a SANDBAG SET,CERVICAL,X-RAY.
What parts can replace RU-4?
There are 10 known substitutes for RU-4: 11P, 528AM, 55P and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for RU-4?
RU-4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-232-0109. 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