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503-475 — BRAKE DRUM

✓ Government record, cited
— · PIPE SECTION
PRODUCT OVERVIEW

503-475: BRAKE DRUM.

The BRAKE DRUM is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, cooling_fin: NOT INCLUDED, balancing_pad: NOT INCLUDED, overall_width: 1.000 INCHES NOMINAL IN, oil_drain_hole: NOT INCLUDED, adjustment_hole: NOT INCLUDED. This part is cataloged in the U.S.

Government catalog under NSN 4720-00-158-1297, 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
503-475
NSN: 4720-00-158-1297
NIINs: 001581297, 011109014
FSC: 4720 — Hose and Flexible Tubing
CAGE: 44940 — CUMMINS POWER GENERATION INC. (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
cooling_finNOT INCLUDED
balancing_padNOT INCLUDED
overall_width1.000 INCHES NOMINAL IN
oil_drain_holeNOT INCLUDED
adjustment_holeNOT INCLUDED
inspection_holeNOT INCLUDED
center_hole_diameter3.000 INCHES NOMINAL IN
braking_surface_width1.000 INCHES NOMINAL IN
braking_surface_diameter5.000 INCHES NOMINAL IN
braking_surface_locationEXTERNAL
overall_outside_diameter5.000 INCHES NOMINAL IN
NSN4720-00-158-1297
COMPONENT DIAGRAM
PIPE SECTION — SCHEDULE = WALL THICKNESS WALL: — OD: — LENGTH: — — — PN: 503-475 · OEM ⚠ VERIFY BEFORE ORDERING Schedule = wall thickness, NOT pipe diameter. Sch 40 and Sch 80 have the same OD but different wall thickness. Nominal pipe size ≠ actual OD — a 1" pipe is actually 1.315" OD ✓ BROKER TIP Sch 40 = standard wall, Sch 80 = heavy wall (higher pressure), Sch 160 = extra heavy. Seamless pipe is required for high-pressure applications — welded pipe has lower ratings PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
STYLE DESIGNATOR: SINGLE BEND
•
WALL THICKNESS: 0.187 INCHES NOMINAL IN
•
INSIDE DIAMETER: 1.750 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC OVERALL
•
BEND RADIUS: 2.750 INCHES NOMINAL IN
•
SECOND ARM LENGTH: 9.875 INCHES NOMINAL IN
•
WORKING LENGTH: 10.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
STYLE DESIGNATORSINGLE BEND
WALL THICKNESS0.187 INCHES NOMINAL IN
INSIDE DIAMETER1.750 INCHES NOMINAL IN
SPECIAL FEATURESLONGEST LEG OFFSET UPWARDS 0.500 IN. IN
MATERIALRUBBER SYNTHETIC OVERALL
BEND RADIUS2.750 INCHES NOMINAL IN
SECOND ARM LENGTH9.875 INCHES NOMINAL IN
WORKING LENGTH10.750 INCHES NOMINAL IN
FIRST ARM LENGTH3.000 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 2
503B475Reference document
Same NSN cross-reference
Reference document — Secondary reference
503A475Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Shelf-life managedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 503-475?
503-475 is a BRAKE DRUM.
What parts can replace 503-475?
There are 2 known substitutes for 503-475: 503B475, 503A475. Substitute compatibility should be verified for your specific system.
What is the NSN for 503-475?
503-475 is cataloged in the U.S. Government catalog under NSN 4720-00-158-1297. 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.