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Technical Data Sheet
PartsTable / O-RING / 501239
501239 ✓ 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 RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1074, ring_style: INTERNAL, usage_design: INTERNAL, major_thickness: 0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN, outside_diameter: 0.555 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN, surface_treatment: CADMIUM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-579-8157, 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
501239
NSN: 5331-00-579-8157
FSC: 5331 — O-RING
CAGE: 21450 — ARMY WEAPONS COMMAND ATTN AMSWE-REE-S (USA)
SPECIFICATIONS
materialSTEEL COMP 1074
ring_styleINTERNAL
usage_designINTERNAL
major_thickness0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN
outside_diameter0.555 INCHES MINIMUM AND 0.570 INCHES MAXIMUM IN
surface_treatmentCADMIUM
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating66.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 73.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationAMS 5120, COMPOSITION 1074 ASSN STD SINGLE MATERIAL RESPONSE
NSN5331-00-579-8157
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 501239 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
•
CENTER HOLE DIAMETER: 1.715 INCHES MINIMUM AND 1.735 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
•
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
•
OUTSIDE DIAMETER: 2.120 INCHES MINIMUM AND 2.170 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER1.715 INCHES MINIMUM AND 1.735 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
OUTSIDE DIAMETER2.120 INCHES MINIMUM AND 2.170 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
0568-0327Interchangeable
interchangeable cross-reference
interchangeable
6227-30Interchangeable
interchangeable cross-reference
interchangeable
6230-24Interchangeable
interchangeable cross-reference
interchangeable
AN6227-30Interchangeable
interchangeable cross-reference
interchangeable
AN6627B-30Interchangeable
interchangeable cross-reference
interchangeable
24288Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 501239?
501239 is a RING,RETAINING.
What parts can replace 501239?
There are 21 known substitutes for 501239: 0568-0327, 6227-30, 6230-24 and 18 more. Substitute compatibility should be verified for your specific system.
Is 501239 still available?
501239 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