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ESB021-3 — CUP,GREASE

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

ESB021-3: CUP,GREASE.

The CUP,GREASE is a the manufacturer industrial component. Key specifications include height: 1.188 INCHES NOMINAL IN, material: STEEL OVERALL, shank_length: 0.312 INCHES NOMINAL IN, style_designator: STRAIGHT, CAP FEED, surface_treatment: ZINC OVERALL, nominal_thread_size: 0.250 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 4730-01-052-4007, 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
ESB021-3
NSN: 4730-01-052-4007
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 51802 — HANSOME ENERGY SYSTEMS INC (USA)
SPECIFICATIONS
height1.188 INCHES NOMINAL IN
materialSTEEL OVERALL
shank_length0.312 INCHES NOMINAL IN
style_designatorSTRAIGHT, CAP FEED
surface_treatmentZINC OVERALL
nominal_thread_size0.250 INCHES IN
assembly_clearance_radius0.750 INCHES NOMINAL IN
screw_thread_series_designatorNPT
NSN4730-01-052-4007
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: ESB021-3 · 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
•
ASSEMBLY CLEARANCE RADIUS: 0.750 INCHES NOMINAL IN
•
SHANK LENGTH: 0.312 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT, CAP FEED
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
HEIGHT: 1.188 INCHES NOMINAL IN
•
SCREW THREAD SERIES DESIGNATOR: NPT
•
SURFACE TREATMENT: ZINC OVERALL
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
ASSEMBLY CLEARANCE RADIUS0.750 INCHES NOMINAL IN
SHANK LENGTH0.312 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT, CAP FEED
NOMINAL THREAD SIZE0.250 INCHES IN
HEIGHT1.188 INCHES NOMINAL IN
SCREW THREAD SERIES DESIGNATORNPT
SURFACE TREATMENTZINC OVERALL
MATERIALSTEEL OVERALL
SUBSTITUTES & CROSS-REFERENCES 2
HAN4891-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
07005Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 ESB021-3?
ESB021-3 is a CUP,GREASE.
What parts can replace ESB021-3?
There are 2 known substitutes for ESB021-3: HAN4891-1, 07005. Substitute compatibility should be verified for your specific system.
What is the NSN for ESB021-3?
ESB021-3 is cataloged in the U.S. Government catalog under NSN 4730-01-052-4007. 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.