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Technical Data Sheet
PartsTable / COMPONENT / 20-2 1/2
20-2 1/2 ✓ 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 20-2 1/2 is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-267-2061, 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
20-2 1/2
NSN: 4730-01-267-2061
FSC: 4730
CAGE: 34646 — ATI LADISH LLC DBA ATI WAH CHANG DIV ATI FORGED PRODUCTS - CUDAHY (USA)
SPECIFICATIONS
Part Number20-2 1/2
NSN4730-01-267-2061
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 20-2 1/2 · 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
•
THICKNESS: 0.875 INCHES NOMINAL IN
•
FACE SEATING SURFACE CONDITION: MACHINED
•
BOLT CIRCLE DIAMETER: 5.500 INCHES NOMINAL IN
•
MATERIAL: STEEL
•
FLANGE DIAMETER: 7.000 INCHES NOMINAL IN
•
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED: 500.0 FAHRENHEIT ANY ACCEPTABLE DEGF
•
BOLT HOLE QUANTITY: 4
TECHNICAL CHARACTERISTICS (FLIS)
THICKNESS0.875 INCHES NOMINAL IN
FACE SEATING SURFACE CONDITIONMACHINED
BOLT CIRCLE DIAMETER5.500 INCHES NOMINAL IN
MATERIALSTEEL
FLANGE DIAMETER7.000 INCHES NOMINAL IN
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED500.0 FAHRENHEIT ANY ACCEPTABLE DEGF
SPECIAL FEATURESFLANGES CONFORM TO ASA STANDARD B16.5
BOLT HOLE QUANTITY4
STYLE DESIGNATORROUND, ONE BOLT HOLE CIRCLE
NOMINAL PIPE SIZE FOR WHICH DESIGNED2.500 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
B16-5-1953TABLE21Interchangeable
interchangeable cross-reference
interchangeable
ASME B16.5Interchangeable
interchangeable cross-reference
interchangeable
B16-5-1-1-4IN-IPS150PSI-PP-FLGEInterchangeable
interchangeable cross-reference
interchangeable
20-1-1/4Interchangeable
interchangeable cross-reference
interchangeable
4190215Interchangeable
interchangeable cross-reference
interchangeable
29516Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20-2 1/2?
20-2 1/2 is a 20-2 1/2.
What parts can replace 20-2 1/2?
There are 15 known substitutes for 20-2 1/2: B16-5-1953TABLE21, ASME B16.5, B16-5-1-1-4IN-IPS150PSI-PP-FLGE and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20-2 1/2?
20-2 1/2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-267-2061. 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