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Technical Data Sheet
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C20637 ✓ 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 COUPLING,HOSE is a the manufacturer industrial component. Key specifications include material: OVERALL,PLASTIC,PHENOL-FORMALDEHYDE/BAKELITE/,GRADE XX, end_style: 90 DEGREE PARALLEL, point_type: CONVENTIONAL, ring_style: STRAIGHT GAP, point_angle: 118.0 DEGREES NOMINAL, shank_style: STRAIGHT ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-517-1513, 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
C20637
NSN: 4730-01-517-1513
FSC: 4730
CAGE: 32142 — HYDRASEARCH COMPANY, LLC (USA)
SPECIFICATIONS
materialOVERALL,PLASTIC,PHENOL-FORMALDEHYDE/BAKELITE/,GRADE XX
end_style90 DEGREE PARALLEL
point_typeCONVENTIONAL
ring_styleSTRAIGHT GAP
point_angle118.0 DEGREES NOMINAL
shank_styleSTRAIGHT ROUND
flute_length0.250 INCHES NOMINAL IN
usage_designEXTERNAL OR INTERNAL
flute_quantity2
inclosure_typeHERMETICALLY SEALED
overall_height0.250 INCHES NOMINAL IN
overall_length1.000 INCHES NOMINAL IN
NSN4730-01-517-1513
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: C20637 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
150 75Interchangeable
interchangeable cross-reference
interchangeable
44145Interchangeable
interchangeable cross-reference
interchangeable
13375Interchangeable
interchangeable cross-reference
interchangeable
HE0L218PC58Interchangeable
interchangeable cross-reference
interchangeable
20637Interchangeable
interchangeable cross-reference
interchangeable
1514Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is C20637?
C20637 is a COUPLING,HOSE.
What parts can replace C20637?
There are 13 known substitutes for C20637: 150 75, 44145, 13375 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for C20637?
C20637 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-517-1513. 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