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56-528 ✓ 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 RETAINER,OFFSET,OUT is a the manufacturer industrial component. Key specifications include color: BLACK, material: PLASTIC PHENOLIC, style_designator: ROUND, gripping_surface_condition: GRIP AID. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-288-8579, 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
56-528
NSN: 4730-00-288-8579
FSC: 4730
CAGE: 62727 — MID-STATE SALES, INC. DIV DEFENSE PRODUCTS GROUP (USA)
SPECIFICATIONS
colorBLACK
materialPLASTIC PHENOLIC
style_designatorROUND
gripping_surface_conditionGRIP AID
NSN4730-00-288-8579
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 56-528 · 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
•
LEG LENGTH: 1.234 INCHES NOMINAL FIRST END IN
•
MATERIAL: STEEL OVERALL
•
SURFACE TREATMENT: CHROMIUM OVERALL
•
CONNECTION TYPE: THREADED INTERNAL PIPE ALL ENDS
•
THREAD SERIES DESIGNATOR: NPTF ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
LEG LENGTH1.234 INCHES NOMINAL FIRST END IN
LEG LENGTH1.234 INCHES NOMINAL SECOND END IN
MATERIALSTEEL OVERALL
LEG LENGTH1.234 INCHES NOMINAL THIRD END IN
LEG LENGTH1.234 INCHES NOMINAL FOURTH END IN
SURFACE TREATMENTCHROMIUM OVERALL
CONNECTION TYPETHREADED INTERNAL PIPE ALL ENDS
THREAD SERIES DESIGNATORNPTF ALL ENDS
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
NOMINAL THREAD SIZE1.234 INCHES ALL ENDS IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
56-528Interchangeable
interchangeable cross-reference
interchangeable
56505Interchangeable
interchangeable cross-reference
interchangeable
419493Interchangeable
interchangeable cross-reference
interchangeable
419492Interchangeable
interchangeable cross-reference
interchangeable
MT13S428CP24MInterchangeable
interchangeable cross-reference
interchangeable
022X-8Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 56-528?
56-528 is a RETAINER,OFFSET,OUT.
What parts can replace 56-528?
There are 13 known substitutes for 56-528: 56-528, 56505, 419493 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 56-528?
56-528 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-288-8579. 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