PartsTable
Technical Data Sheet
H304 ✓ Verified by PartsTable
· BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

PISTON,INTERNAL COMBUSTION ENGIN. Key specifications include shape: STRAIGHT, material: STEEL SHELL, unit_type: NONREFILLABLE, seat_angle: 45.0 DEGREES, thread_size: 3/4-16 BOTH ENDS, corner_shape: SQUARE ALL CORNERS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-00-288-2459, 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
H304
NSN: 3120-00-288-2459
FSC: 3120
CAGE: 75292 — EAGLE-PICHER INDUSTRIES INC KINGWELL DIV (USA)
SPECIFICATIONS
shapeSTRAIGHT
materialSTEEL SHELL
unit_typeNONREFILLABLE
seat_angle45.0 DEGREES
thread_size3/4-16 BOTH ENDS
corner_shapeSQUARE ALL CORNERS
shell_length7.750 INCHES NOMINAL IN
thread_class2A BOTH ENDS A
desiccant_typeALUMINA, ACTIVATED AND MOLECULAR SIEVE
overall_length9.750 INCHES MINIMUM AND 10.000 INCHES MAXIMUM IN
shell_diameter3.063 INCHES NOMINAL IN
style_designatorFLARED BOTH ENDS
NSN3120-00-288-2459
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: H304 · 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
CORNER SHAPE: SQUARE ALL CORNERS
MATERIAL DOCUMENT AND CLASSIFICATION: SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL: COPPER ALLOY 932 OVERALL
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
BODY INSIDE DIAMETER: 1.7490 INCHES MINIMUM AND 1.7510 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER: 2.0020 INCHES MINIMUM AND 2.0030 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
CORNER SHAPESQUARE ALL CORNERS
MATERIAL DOCUMENT AND CLASSIFICATIONSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALCOPPER ALLOY 932 OVERALL
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
BODY INSIDE DIAMETER1.7490 INCHES MINIMUM AND 1.7510 INCHES MAXIMUM IN
OVERALL LENGTH2.4950 INCHES MINIMUM AND 2.5050 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER2.0020 INCHES MINIMUM AND 2.0030 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
1427Interchangeable
interchangeable cross-reference
interchangeable
105A140Interchangeable
interchangeable cross-reference
interchangeable
A8918Interchangeable
interchangeable cross-reference
interchangeable
8193059Interchangeable
interchangeable cross-reference
interchangeable
BS7111-7Interchangeable
interchangeable cross-reference
interchangeable
060119Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is H304?
H304 is a PISTON,INTERNAL COMBUSTION ENGIN.
What parts can replace H304?
There are 17 known substitutes for H304: 1427, 105A140, A8918 and 14 more. Substitute compatibility should be verified for your specific system.
Is H304 still available?
H304 is currently cancelled.
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