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MP-48 — BASE,MAST

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

MP-48: BASE,MAST.

The BASE,MAST is a the manufacturer industrial component. Key specifications include material: STEEL AND WOOL SEAL, seal_type: LABYRINTH, block_type: FIXED, base_length: 3.5000 INCHES NOMINAL IN, bore_diameter: 3.0000 INCHES NOMINAL IN, housing_width: 13.0000 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3130-00-629-0957, 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
MP-48
NSN: 3130-00-629-0957
NIINs: 006290957, 006362385, 014519003
FSC: 3130 — Bearings, Mounted
CAGE: 57448 — STEPHENS-ADAMSON INC A SUB OF ALLIS-CHALMERS CORP (USA)
SPECIFICATIONS
materialSTEEL AND WOOL SEAL
seal_typeLABYRINTH
block_typeFIXED
base_length3.5000 INCHES NOMINAL IN
bore_diameter3.0000 INCHES NOMINAL IN
housing_width13.0000 INCHES NOMINAL IN
seal_locationBOTH ENDS
alignment_typeSELF-ALIGNING
base_thickness1.2500 INCHES NOMINAL IN
housing_height7.2500 INCHES NOMINAL IN
shaft_end_typeOPEN
mounting_methodUNTHREADED HOLE(S) AND UNTHREADED STUD
NSN3130-00-629-0957
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: MP-48 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SEAL TYPE: LABYRINTH
•
LUBRICATION MATERIAL: GREASE
•
LUBRICATION FITTING TYPE: HYDRAULIC
•
ASSEMBLY OVERALL LENGTH: 3.5000 INCHES NOMINAL IN
•
HOUSING HEIGHT: 7.2500 INCHES NOMINAL IN
•
MOUNTING SLOT LENGTH: 2.0000 INCHES NOMINAL IN
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
MOUNTING HOLE TYPE: SLOTTED
TECHNICAL CHARACTERISTICS
SEAL TYPELABYRINTH
LUBRICATION MATERIALGREASE
LUBRICATION FITTING TYPEHYDRAULIC
ASSEMBLY OVERALL LENGTH3.5000 INCHES NOMINAL IN
HOUSING HEIGHT7.2500 INCHES NOMINAL IN
MOUNTING SLOT LENGTH2.0000 INCHES NOMINAL IN
INTERNAL FIT-UP DESIGNATIONSTANDARD
MOUNTING HOLE TYPESLOTTED
ROTATING ELEMENT LOCKING METHODDIRECT
SEAL LOCATIONBOTH ENDS
SUBSTITUTES & CROSS-REFERENCES 1
SCM3Reference document
Same NSN cross-reference
Reference document — Replaced / superseded reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MP-48?
MP-48 is a BASE,MAST.
What parts can replace MP-48?
There is 1 known substitute for MP-48: SCM3. Substitute compatibility should be verified for your specific system.
What is the NSN for MP-48?
MP-48 is cataloged in the U.S. Government catalog under NSN 3130-00-629-0957. This indicates validated use in U.S. government and defense supply chains.
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✓ 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.