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657978 — BEARING,BALL,AIRFRAME

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

657978: BEARING,BALL,AIRFRAME.

The BEARING,BALL,AIRFRAME is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC SEAL, bore_diameter: 1.0620 INCHES MINIMUM AND 1.0625 INCHES MAXIMUM IN, inner_ring_width: 0.2760 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN, outer_ring_width: 0.2450 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN, special_features: 0.0008 TO 0.0015 RADIAL PLAY, style_designator: SINGLE ROW INNER RING EXTENDED BOTH SIDES. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-121-2763, 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
657978
NSN: 5330-01-121-2763
NIINs: 011212763, 013912163
FSC: 5330 — Packing and Gasket Materials
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC SEAL
bore_diameter1.0620 INCHES MINIMUM AND 1.0625 INCHES MAXIMUM IN
seal_quantity2
inner_ring_width0.2760 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN
outer_ring_width0.2450 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN
special_features0.0008 TO 0.0015 RADIAL PLAY
style_designatorSINGLE ROW INNER RING EXTENDED BOTH SIDES
bearing_seal_typeCONTACT
overall_outside_diameter1.4995 INCHES MINIMUM AND 1.5000 INCHES MAXIMUM IN
NSN5330-01-121-2763
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 657978 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
•
CROSS-SECTIONAL HEIGHT: 0.117 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: 1E668 FSCM 11083 MFR REF SINGLE MATERIAL RESPONSE OVERALL
•
CROSS-SECTIONAL SHAPE STYLE: SQUARE/RECTANGULAR
•
PERIPHERAL DIAMETER: 7.211 INCHES MINIMUM AND 7.281 INCHES MAXIMUM IN
•
CENTER HOLE DIAMETER: 6.751 INCHES MINIMUM AND 6.797 INCHES MAXIMUM IN
•
MATERIAL: RUBBER OVERALL
TECHNICAL CHARACTERISTICS
CROSS-SECTIONAL HEIGHT0.117 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION1E668 FSCM 11083 MFR REF SINGLE MATERIAL RESPONSE OVERALL
CROSS-SECTIONAL SHAPE STYLESQUARE/RECTANGULAR
PERIPHERAL DIAMETER7.211 INCHES MINIMUM AND 7.281 INCHES MAXIMUM IN
CENTER HOLE DIAMETER6.751 INCHES MINIMUM AND 6.797 INCHES MAXIMUM IN
MATERIALRUBBER OVERALL
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 657978?
657978 is a BEARING,BALL,AIRFRAME.
What is the NSN for 657978?
657978 is cataloged in the U.S. Government catalog under NSN 5330-01-121-2763. This indicates validated use in U.S. government and defense supply chains.
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