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Technical Data Sheet
PartsTable / COMPONENT / UH4
UH4 ✓ 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: COPPER ALLOY OVERALL, attachment_method: ROUND HOLE, rim_surface_width: 0.875 INCHES NOMINAL IN, peripheral_diameter: 7.438 INCHES NOMINAL IN, center_hole_diameter: 2.375 INCHES NOMINAL IN, cross-sectional_height: 2.438 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-168-0836, 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
UH4
NSN: 5330-00-168-0836
FSC: 5330
CAGE: 63857 — CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
attachment_methodROUND HOLE
rim_surface_width0.875 INCHES NOMINAL IN
peripheral_diameter7.438 INCHES NOMINAL IN
center_hole_diameter2.375 INCHES NOMINAL IN
cross-sectional_height2.438 INCHES NOMINAL IN
attachment_hole_diameter1.000 INCHES NOMINAL IN
cross-sectional_thickness0.625 INCHES NOMINAL IN
attachment_feature_quantity2
cross-sectional_shape_styleFLANGE
NSN5330-00-168-0836
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: UH4 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
•
CROSS-SECTIONAL SHAPE STYLE: FLANGE
•
ATTACHMENT METHOD: ROUND HOLE
•
RIM SURFACE WIDTH: 0.875 INCHES NOMINAL IN
•
ATTACHMENT HOLE DIAMETER: 1.000 INCHES NOMINAL IN
•
PERIPHERAL DIAMETER: 7.438 INCHES NOMINAL IN
•
MATERIAL: COPPER ALLOY OVERALL
•
ATTACHMENT FEATURE QUANTITY: 2
•
CROSS-SECTIONAL HEIGHT: 2.438 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLEFLANGE
ATTACHMENT METHODROUND HOLE
RIM SURFACE WIDTH0.875 INCHES NOMINAL IN
ATTACHMENT HOLE DIAMETER1.000 INCHES NOMINAL IN
PERIPHERAL DIAMETER7.438 INCHES NOMINAL IN
MATERIALCOPPER ALLOY OVERALL
ATTACHMENT FEATURE QUANTITY2
CROSS-SECTIONAL HEIGHT2.438 INCHES NOMINAL IN
CENTER HOLE DIAMETER2.375 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.625 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
182-1156Interchangeable
interchangeable cross-reference
interchangeable
122357-70Interchangeable
interchangeable cross-reference
interchangeable
MT214Interchangeable
interchangeable cross-reference
interchangeable
1078-6Interchangeable
interchangeable cross-reference
interchangeable
3200X6Interchangeable
interchangeable cross-reference
interchangeable
921Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is UH4?
UH4 is a RETAINER,PACKING.
What parts can replace UH4?
There are 13 known substitutes for UH4: 182-1156, 122357-70, MT214 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for UH4?
UH4 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-168-0836. 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