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BR 4 — BEARING,ROLLER,AIRFRAME

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

BR 4: BEARING,ROLLER,AIRFRAME.

The BEARING,ROLLER,AIRFRAME is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY BODY, body_length: 3.750 INCHES NOMINAL IN, temp_rating: 400.000 FAHRENHEIT MAXIMUM DEGF, corner_shape: SQUARE ALL CORNERS, bore_diameter: 0.2495 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN, overall_length: 1.7830 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 4320-00-441-2618, 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
BR 4
NSN: 4320-00-441-2618
NIINs: 004412618, 009744141, 017082286
FSC: 4320 — Power and Hand Pumps
CAGE: 63857 — CIRCOR NAVAL SOLUTIONS LLC DBA WARREN PUMPS (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
body_length3.750 INCHES NOMINAL IN
temp_rating400.000 FAHRENHEIT MAXIMUM DEGF
corner_shapeSQUARE ALL CORNERS
bore_diameter0.2495 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN
seal_quantity2
overall_length1.7830 INCHES NOMINAL IN
inner_ring_width0.6200 INCHES MINIMUM AND 0.6250 INCHES MAXIMUM IN
keyway_dimension0.5000 INCHES NOMINAL INTERNAL KEYWAY LENGTH IN
outer_ring_width0.4640 INCHES NOMINAL IN
special_featuresLUBRICANT HOLES AND GROOVE IN OUTER RING,TWO HEAT TREATED SLEEVES AND COLLARS ON INNER RING,RADIAL CLEARANCE 0.0002 IN. TO 0.0017 IN. IN
style_designatorY STRAINER W/BLOW-OFF PLUG
NSN4320-00-441-2618
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available BEARING,ROLLER,AIRFRAME TITLE COMPONENT PN BR 4 MFR BEARING,ROLLER,AIRFRAM
KEY FEATURES
•
CORNER SHAPE: SQUARE ALL CORNERS
•
BODY OUTSIDE DIAMETER: 1.6230 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SOLID, PLAIN, NO OUTSIDE FLANGES
•
BODY INSIDE DIAMETER: 1.1250 INCHES NOMINAL IN
•
MATERIAL: COPPER OVERALL
•
KEYWAY DIMENSION: 0.5000 INCHES NOMINAL INTERNAL KEYWAY LENGTH IN
TECHNICAL CHARACTERISTICS
CORNER SHAPESQUARE ALL CORNERS
BODY OUTSIDE DIAMETER1.6230 INCHES NOMINAL IN
STYLE DESIGNATORSOLID, PLAIN, NO OUTSIDE FLANGES
OVERALL LENGTH1.7830 INCHES NOMINAL IN
BODY INSIDE DIAMETER1.1250 INCHES NOMINAL IN
MATERIALCOPPER OVERALL
KEYWAY DIMENSION0.5000 INCHES NOMINAL INTERNAL KEYWAY LENGTH IN
KEYWAY DIMENSION0.0990 INCHES NOMINAL INTERNAL KEYWAY DEPTH IN
SUBSTITUTES & CROSS-REFERENCES 1
R734PC22Same 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 BR 4?
BR 4 is a BEARING,ROLLER,AIRFRAME.
What parts can replace BR 4?
There is 1 known substitute for BR 4: R734PC22. Substitute compatibility should be verified for your specific system.
What is the NSN for BR 4?
BR 4 is cataloged in the U.S. Government catalog under NSN 4320-00-441-2618. 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.