PartsTable
Technical Data Sheet
Download PDF

56520 — SEAL,PLAIN ENCASED

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

56520: SEAL,PLAIN ENCASED.

The SEAL,PLAIN ENCASED is a the manufacturer industrial component. Key specifications include material: ALUMINUM OVERALL, usage_design: ENTIRE HAND, overall_length: 12.250 INCHES NOMINAL IN, usage_location: EITHER HAND, design_designation: MASON-ALLEN, part_name_assigned_by_controlling_agency: SPLINT HAND MASON-ALLEN 12.25" LG EITHER HAND ALUMINUM. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-054-5000, 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
56520
NSN: 5330-00-054-5000
NIINs: 000545000, 003722150
FSC: 5330 — Packing and Gasket Materials
CAGE: 96879 — TROSTEL ALBERT PACKING LTD (USA)
SPECIFICATIONS
materialALUMINUM OVERALL
usage_designENTIRE HAND
overall_length12.250 INCHES NOMINAL IN
usage_locationEITHER HAND
design_designationMASON-ALLEN
part_name_assigned_by_controlling_agencySPLINT HAND MASON-ALLEN 12.25" LG EITHER HAND ALUMINUM
NSN5330-00-054-5000
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 56520 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
•
TEMP RATING: -60.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF
•
SEAL WIDTH: 0.313 INCHES NOMINAL IN
•
SEALING ELEMENT STYLE: ANGULAR
•
HOUSING BORE DIAMETER: 1.624 INCHES NOMINAL IN
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 2000 FEET PER MINUTE FT
•
CASE STYLE: SQUARE
•
ACCOMMODATED SHAFT DIAMETER: 1.125 INCHES NOMINAL IN
•
MATERIAL: STEEL CASE
TECHNICAL CHARACTERISTICS
TEMP RATING-60.0 FAHRENHEIT AND 200.0 FAHRENHEIT DEGF
SEAL WIDTH0.313 INCHES NOMINAL IN
SEALING ELEMENT STYLEANGULAR
HOUSING BORE DIAMETER1.624 INCHES NOMINAL IN
ACCOMMODATED SHAFT MAXIMUM RATED SPEED2000 FEET PER MINUTE FT
CASE STYLESQUARE
ACCOMMODATED SHAFT DIAMETER1.125 INCHES NOMINAL IN
MATERIALSTEEL CASE
MATERIALLEATHER SEALING ELEMENT
SUBSTITUTES & CROSS-REFERENCES 4
10BM271Reference document
Same NSN cross-reference
Reference document — Secondary reference
03698958Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
T51100Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
4326-10BM271Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
Ready to buy 56520?
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 56520?
56520 is a SEAL,PLAIN ENCASED.
What parts can replace 56520?
There are 4 known substitutes for 56520: 10BM271, 03698958, T51100 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 56520?
56520 is cataloged in the U.S. Government catalog under NSN 5330-00-054-5000. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 56520

✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.