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21C2686-045 — Technical Data Sheet

✓ 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 NIPPLE,PIPE is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, connection_type: THREADED EXTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, style_designator: CLOSE, nominal_thread_size: 0.750 INCHES ALL ENDS IN, nominal_overall_length: 1.500 INCHES IN. This part is cataloged in the Federal Logistics Information System under NSN 4730-01-180-7220, 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
21C2686-045
NSN: 4730-01-180-7220
FSC: 4730
CAGE: 07482 — GENERAL ELECTRIC COMPANY (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
connection_typeTHREADED EXTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
style_designatorCLOSE
nominal_thread_size0.750 INCHES ALL ENDS IN
nominal_overall_length1.500 INCHES IN
thread_series_designatorNPT ALL ENDS
NSN4730-01-180-7220
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 21C2686-045 · 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
•
NOMINAL THREAD SIZE: 0.750 INCHES ALL ENDS IN
•
CONNECTION STYLE: PLAIN (PIPE) ALL ENDS
•
CONNECTION TYPE: THREADED EXTERNAL PIPE ALL ENDS
•
STYLE DESIGNATOR: CLOSE
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
NOMINAL OVERALL LENGTH: 1.500 INCHES IN
•
THREAD SERIES DESIGNATOR: NPT ALL ENDS
TECHNICAL CHARACTERISTICS
NOMINAL THREAD SIZE0.750 INCHES ALL ENDS IN
CONNECTION STYLEPLAIN (PIPE) ALL ENDS
CONNECTION TYPETHREADED EXTERNAL PIPE ALL ENDS
STYLE DESIGNATORCLOSE
MATERIALSTEEL CORROSION RESISTING OVERALL
NOMINAL OVERALL LENGTH1.500 INCHES IN
THREAD SERIES DESIGNATORNPT ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
SS-2-CNInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
D1-3727-36InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
NIPPLETYPE316InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2519394-1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
8489705InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
1-2X2-316InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 21C2686-045?
21C2686-045 is a NIPPLE,PIPE.
What parts can replace 21C2686-045?
There are 16 known substitutes for 21C2686-045: SS-2-CN, D1-3727-36, NIPPLETYPE316 and 13 more. Substitute compatibility should be verified for your specific system.
Is 21C2686-045 still available?
21C2686-045 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: October 2026