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Technical Data Sheet
PartsTable / MRO / 56550
56550 ✓ Verified by PartsTable
Hama · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

- High-quality cable material made of selected components<br>- Attractive design<br>- Separately shielded wires<br>- Loose, with banderol<br>- Colour: black. Key specifications include material: STEEL COMP 8735 OR STEEL COMP 8740 OVERALL, nut_style: SLOTTED, HEXAGON, body_style: CYLINDRICAL BUSHING MOUNTED, nut_height: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, body_length: 0.703 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN, shaft_style: ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-073-8163, 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
MRO→ MRO_GENERAL→ 56550
NSN: 5331-00-073-8163
FSC: 5331 — O-RING
CAGE: 93835 — PARKER HANNIFIN CORPORATION DIV HYDRAULIC SYSTEMS DIVISION (USA)
SPECIFICATIONS
materialSTEEL COMP 8735 OR STEEL COMP 8740 OVERALL
nut_styleSLOTTED, HEXAGON
body_styleCYLINDRICAL BUSHING MOUNTED
nut_height0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
body_length0.703 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN
shaft_styleROUND
shaft_length0.719 INCHES MINIMUM AND 0.781 INCHES MAXIMUM IN
thread_class3B
actuator_typeSINGLE SHAFT
body_diameter0.844 INCHES MINIMUM AND 0.906 INCHES MAXIMUM IN
thread_seriesUNF
shaft_diameter0.248 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN
NSN5331-00-073-8163
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 56550 MFR: Hama ⚠ 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
•
CENTER HOLE DIAMETER: 0.170 INCHES MINIMUM AND 0.182 INCHES MAXIMUM IN
•
CROSS-SECTIONAL HEIGHT: 0.066 INCHES MINIMUM AND 0.074 INCHES MAXIMUM IN
•
MATERIAL: RUBBER FLUOROCARBON CLASS FPM
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE DIAMETER0.170 INCHES MINIMUM AND 0.182 INCHES MAXIMUM IN
CROSS-SECTIONAL HEIGHT0.066 INCHES MINIMUM AND 0.074 INCHES MAXIMUM IN
MATERIALRUBBER FLUOROCARBON CLASS FPM
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
311-377Interchangeable
interchangeable cross-reference
interchangeable
56550Interchangeable
interchangeable cross-reference
interchangeable
311-0377-00Interchangeable
interchangeable cross-reference
interchangeable
AN150437Interchangeable
interchangeable cross-reference
interchangeable
162581Interchangeable
interchangeable cross-reference
interchangeable
85692Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 56550?
56550 is a RESISTOR,VARIABLE,WIRE WOUND,NON manufactured by Hama. It is classified as a MRO (MRO_GENERAL).
What parts can replace 56550?
There are 10 known substitutes for 56550: 311-377, 56550, 311-0377-00 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 56550?
56550 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-073-8163. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026