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L055B ✓ Verified by PartsTable
— · HOSE FITTING
WHAT YOU NEED TO KNOW
PTFE tape on tapered threads (NPT/BSPT) JIC/AN flare connections seal metal-to-metal — no tape
NPT != BSPT — look identical, NOT interchangeable
PRODUCT OVERVIEW

The IBM 1GB MAIN STORAGE 800/810 is a the manufacturer industrial component. Key specifications include material: NICKEL ALLOY, blade_type: BACKWARD CURVE, hub_length: 1.312 INCHES NOMINAL IN, body_length: 0.285 INCHES MAXIMUM IN, design_type: SINGLE WIDTH, keyway_type: STRAIGHT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-438-8747, 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
L055B
NSN: 4730-01-438-8747
FSC: 4730
CAGE: 95094 — CLARK-RELIANCE LLC DBA JACOBY-TARBOX (USA)
SPECIFICATIONS
materialNICKEL ALLOY
blade_typeBACKWARD CURVE
hub_length1.312 INCHES NOMINAL IN
body_length0.285 INCHES MAXIMUM IN
design_typeSINGLE WIDTH
keyway_typeSTRAIGHT
hub_locationSINGLE INSIDE OFFSET
hub_quantity1
keyway_depth0.098 INCHES MINIMUM AND 0.108 INCHES MAXIMUM IN
keyway_width0.188 INCHES NOMINAL IN
keyway_length1.312 INCHES NOMINAL IN
overall_width1.625 INCHES NOMINAL IN
NSN4730-01-438-8747
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: L055B · OEM ⚠ VERIFY BEFORE ORDERING NPT ≠ BSPT — tapered threads look identical but are NOT interchangeable. Wrong thread = leak. JIC (37°) ≠ AN (37°) ≠ SAE 45° — flare angles must match exactly. Measure thread pitch with gauge — visual identification is unreliable ✓ BROKER TIP Always use thread sealant (PTFE tape or pipe compound) on tapered threads (NPT/BSPT). JIC/AN flare fittings seal metal-to-metal — never use tape on flare connections PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
1GB Capacity
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
378389Interchangeable
interchangeable cross-reference
interchangeable
3094Interchangeable
IBM 1GB Main Storage 800/810
interchangeable
BAC1505-13900Interchangeable
interchangeable cross-reference
interchangeable
AMS-QQA200-3Interchangeable
interchangeable cross-reference
interchangeable
WW-P-491Interchangeable
interchangeable cross-reference
interchangeable
306Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is L055B?
L055B is a IBM 1GB MAIN STORAGE 800/810.
What parts can replace L055B?
There are 20 known substitutes for L055B: 378389, 3094, BAC1505-13900 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for L055B?
L055B is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-438-8747. 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