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PartsTable / COMPONENT / AD958-7
AD958-7 ✓ 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 SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE NITRILE PACKING, case_style: SQUARE, seal_width: 0.438 INCHES NOMINAL IN, housing_bore_diameter: 3.870 INCHES NOMINAL IN, accommodated_shaft_diameter: 2.880 INCHES NOMINAL IN, part_name_assigned_by_controlling_agency: SEAL OIL, LOW SPEED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-187-8604, 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
AD958-7
NSN: 5330-01-187-8604
FSC: 5330
CAGE: 0PHR4 — CHESTER HOIST AND CRANE INC (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE NITRILE PACKING
case_styleSQUARE
seal_width0.438 INCHES NOMINAL IN
housing_bore_diameter3.870 INCHES NOMINAL IN
accommodated_shaft_diameter2.880 INCHES NOMINAL IN
part_name_assigned_by_controlling_agencySEAL OIL, LOW SPEED
NSN5330-01-187-8604
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AD958-7 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
•
HOUSING BORE DIAMETER: 3.870 INCHES NOMINAL IN
•
CASE STYLE: SQUARE
•
SEAL WIDTH: 0.438 INCHES NOMINAL IN
•
ACCOMMODATED SHAFT DIAMETER: 2.880 INCHES NOMINAL IN
•
MATERIAL: RUBBER BUTADIENE NITRILE PACKING
TECHNICAL CHARACTERISTICS (FLIS)
PART NAME ASSIGNED BY CONTROLLING AGENCYSEAL OIL, LOW SPEED
HOUSING BORE DIAMETER3.870 INCHES NOMINAL IN
CASE STYLESQUARE
SEAL WIDTH0.438 INCHES NOMINAL IN
ACCOMMODATED SHAFT DIAMETER2.880 INCHES NOMINAL IN
MATERIALRUBBER BUTADIENE NITRILE PACKING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
103619Interchangeable
interchangeable cross-reference
interchangeable
5649Interchangeable
interchangeable cross-reference
interchangeable
0463Interchangeable
interchangeable cross-reference
interchangeable
21410CInterchangeable
interchangeable cross-reference
interchangeable
1980Interchangeable
interchangeable cross-reference
interchangeable
28746Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AD958-7?
AD958-7 is a SEAL,PLAIN ENCASED.
What parts can replace AD958-7?
There are 19 known substitutes for AD958-7: 103619, 5649, 0463 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AD958-7?
AD958-7 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-01-187-8604. 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