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Technical Data Sheet
PartsTable / COMPONENT / C21671
C21671 ✓ 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 PARTS KIT,STEAM TRAP is a the manufacturer industrial component. Key specifications include nonsupply_items_and_quantities: DIAPHRAGM PLATE ASSY,CRES AND BRASS 1;PACKING NUT,BRASS 1;HOLDER ASSY,DIAPHRAGM,CRES 1. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-977-0699, 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
C21671
NSN: 4730-00-977-0699
FSC: 4730
CAGE: 53059 — SPIRAX SARCO INC DBA SPIRAX SARCO (USA)
SPECIFICATIONS
component_quantity3
nonsupply_items_and_quantitiesDIAPHRAGM PLATE ASSY,CRES AND BRASS 1;PACKING NUT,BRASS 1;HOLDER ASSY,DIAPHRAGM,CRES 1
NSN4730-00-977-0699
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: C21671 · 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
•
NONSUPPLY ITEMS AND QUANTITIES: DIAPHRAGM PLATE ASSY,CRES AND BRASS 1;PACKING NUT,BRASS 1;HOLDER ASSY,DIAPHRAGM,CRES 1
•
COMPONENT QUANTITY: 3
TECHNICAL CHARACTERISTICS (FLIS)
NONSUPPLY ITEMS AND QUANTITIESDIAPHRAGM PLATE ASSY,CRES AND BRASS 1;PACKING NUT,BRASS 1;HOLDER ASSY,DIAPHRAGM,CRES 1
COMPONENT QUANTITY3
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
48526Interchangeable
interchangeable cross-reference
interchangeable
5998PL0946200Interchangeable
interchangeable cross-reference
interchangeable
58450Interchangeable
interchangeable cross-reference
interchangeable
D58450Interchangeable
interchangeable cross-reference
interchangeable
F451ARJCJC-6-6-4-41.5Interchangeable
interchangeable cross-reference
interchangeable
4856-8Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C21671?
C21671 is a PARTS KIT,STEAM TRAP.
What parts can replace C21671?
There are 16 known substitutes for C21671: 48526, 5998PL0946200, 58450 and 13 more. Substitute compatibility should be verified for your specific system.
Is C21671 still available?
C21671 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: July 2026