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Technical Data Sheet

656A-3/4 SS — CASTER,RIGID

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

656A-3/4 SS: CASTER,RIGID.

The CASTER,RIGID is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, stem_style: COUNTERSUNK PLAIN, wheel_type: SOLID, plate_style: ROUND, stem_length: 0.156 INCHES NOMINAL IN, stem_diameter: 0.734 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-450-3218, 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
656A-3/4 SS
NSN: 5340-01-450-3218
FSC: 5340 — Hardware, Commercial
CAGE: 8V043 — ACME CASTER MFG ENTERPRISES INC (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
stem_styleCOUNTERSUNK PLAIN
wheel_typeSOLID
plate_styleROUND
stem_length0.156 INCHES NOMINAL IN
stem_diameter0.734 INCHES NOMINAL IN
plate_diameter1.312 INCHES NOMINAL IN
wheel_diameter0.688 INCHES NOMINAL IN
wheel_quantity1
effective_height0.750 INCHES NOMINAL IN
style_designatorRIGID
surface_treatmentPASSIVATE OVERALL
NSN5340-01-450-3218
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 656A-3/4 SS 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
•
PLATE STYLE: ROUND
•
STEM DIAMETER: 0.734 INCHES NOMINAL IN
•
STEM LENGTH: 0.156 INCHES NOMINAL IN
•
PLATE DIAMETER: 1.312 INCHES NOMINAL IN
•
WHEEL TYPE: SOLID
•
CRITICALITY CODE JUSTIFICATION: AGAV
•
STYLE DESIGNATOR: RIGID
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-766, 300 SERIES FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS
PLATE STYLEROUND
STEM DIAMETER0.734 INCHES NOMINAL IN
STEM LENGTH0.156 INCHES NOMINAL IN
PLATE DIAMETER1.312 INCHES NOMINAL IN
WHEEL TYPESOLID
CRITICALITY CODE JUSTIFICATIONAGAV
STYLE DESIGNATORRIGID
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-766, 300 SERIES FED SPEC SINGLE MATERIAL RESPONSE OVERALL
CASTER PLATE MOUNTING HOLE DIAMETER0.116 INCHES NOMINAL IN
STEM STYLECOUNTERSUNK PLAIN
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
ST9M402-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 656A-3/4 SS?
656A-3/4 SS is a CASTER,RIGID.
What parts can replace 656A-3/4 SS?
There is 1 known substitute for 656A-3/4 SS: ST9M402-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 656A-3/4 SS?
656A-3/4 SS is cataloged in the U.S. Government catalog under NSN 5340-01-450-3218. 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.