PartsTable
Technical Data Sheet
PartsTable / COMPONENT / MS51920-12-2
MS51920-12-2 ✓ 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: STEEL CASE, case_style: RECESSED, seal_width: 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN, surface_treatment: CADMIUM AND CHROMATE OR ZINC AND CHROMATE CASE, housing_bore_diameter: 1.873 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN, sealing_element_style: ANGULAR. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-182-3222, 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
MS51920-12-2
NSN: 5330-00-182-3222
FSC: 5330
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialSTEEL CASE
case_styleRECESSED
seal_width0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
surface_treatmentCADMIUM AND CHROMATE OR ZINC AND CHROMATE CASE
housing_bore_diameter1.873 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN
sealing_element_styleANGULAR
accommodated_shaft_diameter1.375 INCHES NOMINAL IN
departure_from_cited_documentMONE
surface_treatment_document_and_classificationQQ-P-416,TY 2,CL 2 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 2 FED SPEC 2ND TREATMENT RESPONSE CASE
NSN5330-00-182-3222
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: MS51920-12-2 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
•
SEALING ELEMENT STYLE: ANGULAR
•
CASE STYLE: RECESSED
•
SEAL WIDTH: 0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OR ZINC AND CHROMATE CASE
•
HOUSING BORE DIAMETER: 1.873 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN
•
MATERIAL: STEEL CASE
•
DEPARTURE FROM CITED DOCUMENT: MONE
•
ACCOMMODATED SHAFT DIAMETER: 1.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SEALING ELEMENT STYLEANGULAR
CASE STYLERECESSED
SEAL WIDTH0.235 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM AND CHROMATE OR ZINC AND CHROMATE CASE
HOUSING BORE DIAMETER1.873 INCHES MINIMUM AND 1.875 INCHES MAXIMUM IN
MATERIALSTEEL CASE
DEPARTURE FROM CITED DOCUMENTMONE
ACCOMMODATED SHAFT DIAMETER1.375 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 2 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 2 FED SPEC 2ND TREATMENT RESPONSE CASE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
A-A-52524Interchangeable
interchangeable cross-reference
interchangeable
MILS45005Interchangeable
interchangeable cross-reference
interchangeable
225856Interchangeable
interchangeable cross-reference
interchangeable
A1205-R-1344Interchangeable
interchangeable cross-reference
interchangeable
159183Interchangeable
interchangeable cross-reference
interchangeable
5330010412003Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
Ready to buy MS51920-12-2?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is MS51920-12-2?
MS51920-12-2 is a SEAL,PLAIN ENCASED.
What parts can replace MS51920-12-2?
There are 12 known substitutes for MS51920-12-2: A-A-52524, MILS45005, 225856 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS51920-12-2?
MS51920-12-2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-182-3222. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Comments (0)
No comments yet. Be the first to share what you know.
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — MS51920-12-2

✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026