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57251 — PLATE,MOUNTING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

57251: PLATE,MOUNTING.

The PLATE,MOUNTING is a the manufacturer industrial component. Key specifications include material: STEEL CASE, case_style: SQUARE, seal_width: 0.281 INCHES NOMINAL IN, housing_bore_diameter: 6.001 INCHES MINIMUM AND 6.004 INCHES MAXIMUM IN, sealing_element_style: ANGULAR, accommodated_shaft_diameter: 4.686 INCHES MINIMUM AND 4.690 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-00-651-2742, 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
57251
NSN: 5330-00-651-2742
NIINs: 006512742, 013447401
FSC: 5330 — Packing and Gasket Materials
CAGE: 30076 — HYSTER-YALE GROUP, INC. (USA)
SPECIFICATIONS
materialSTEEL CASE
case_styleSQUARE
seal_width0.281 INCHES NOMINAL IN
housing_bore_diameter6.001 INCHES MINIMUM AND 6.004 INCHES MAXIMUM IN
sealing_element_styleANGULAR
accommodated_shaft_diameter4.686 INCHES MINIMUM AND 4.690 INCHES MAXIMUM IN
accommodated_shaft_maximum_rated_speed7000 FEET PER MINUTE FT
NSN5330-00-651-2742
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 57251 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
•
SEAL WIDTH: 0.281 INCHES NOMINAL IN
•
SEALING ELEMENT STYLE: ANGULAR
•
HOUSING BORE DIAMETER: 6.001 INCHES MINIMUM AND 6.004 INCHES MAXIMUM IN
•
ACCOMMODATED SHAFT MAXIMUM RATED SPEED: 7000 FEET PER MINUTE FT
•
CASE STYLE: SQUARE
•
ACCOMMODATED SHAFT DIAMETER: 4.686 INCHES MINIMUM AND 4.690 INCHES MAXIMUM IN
•
MATERIAL: STEEL CASE
TECHNICAL CHARACTERISTICS
SEAL WIDTH0.281 INCHES NOMINAL IN
SEALING ELEMENT STYLEANGULAR
HOUSING BORE DIAMETER6.001 INCHES MINIMUM AND 6.004 INCHES MAXIMUM IN
ACCOMMODATED SHAFT MAXIMUM RATED SPEED7000 FEET PER MINUTE FT
CASE STYLESQUARE
ACCOMMODATED SHAFT DIAMETER4.686 INCHES MINIMUM AND 4.690 INCHES MAXIMUM IN
MATERIALSTEEL CASE
MATERIALRUBBER SYNTHETIC SEALING ELEMENT
SUBSTITUTES & CROSS-REFERENCES 3
202211BReference document
Same NSN cross-reference
Reference document — Secondary reference
57017Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
1K1500P70Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 57251?
57251 is a PLATE,MOUNTING.
What parts can replace 57251?
There are 3 known substitutes for 57251: 202211B, 57017, 1K1500P70. Substitute compatibility should be verified for your specific system.
What is the NSN for 57251?
57251 is cataloged in the U.S. Government catalog under NSN 5330-00-651-2742. This indicates validated use in U.S. government and defense supply chains.
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