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Technical Data Sheet
PartsTable / COMPONENT / 20-1-1/4
20-1-1/4 ✓ 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 20-1-1/4 is a the manufacturer industrial component. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-022-5679, 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
20-1-1/4
NSN: 4730-01-022-5679
FSC: 4730
CAGE: 34646 — ATI LADISH LLC DBA ATI WAH CHANG DIV ATI FORGED PRODUCTS - CUDAHY (USA)
SPECIFICATIONS
Part Number20-1-1/4
NSN4730-01-022-5679
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 20-1-1/4 · 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
•
SOCKET DIAMETER: 1.700 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A105 MIL SPEC SINGLE MATERIAL RESPONSE
•
STYLE DESIGNATOR: ROUND, ONE BOLT HOLE CIRCLE
•
MATERIAL: STEEL
•
OPERATING PRESSURE AND TYPE: 150.0 POUNDS PER SQUARE INCH (PSI) GAS MAXIMUM REQUIRED AND 150.0 POUNDS PER SQUARE INCH (PSI) OIL MAXIMUM REQUIRED AND 150.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
•
BOLT HOLE QUANTITY: 4
•
SOCKET DEPTH: 0.562 INCHES NOMINAL IN
•
RAISED FACE DIAMETER: 2.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
SOCKET DIAMETER1.700 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A105 MIL SPEC SINGLE MATERIAL RESPONSE
STYLE DESIGNATORROUND, ONE BOLT HOLE CIRCLE
MATERIALSTEEL
OPERATING PRESSURE AND TYPE150.0 POUNDS PER SQUARE INCH (PSI) GAS MAXIMUM REQUIRED AND 150.0 POUNDS PER SQUARE INCH (PSI) OIL MAXIMUM REQUIRED AND 150.0 POUNDS PER SQUARE INCH (PSI) WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
BOLT HOLE QUANTITY4
SOCKET DEPTH0.562 INCHES NOMINAL IN
RAISED FACE DIAMETER2.500 INCHES NOMINAL IN
FLANGE SECTION STYLERAISED FACE, SOCKET NECK
FLANGE DIAMETER4.625 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 22
B16-5-1953TABLE21Interchangeable
interchangeable cross-reference
interchangeable
29513Interchangeable
interchangeable cross-reference
interchangeable
DH29513Interchangeable
interchangeable cross-reference
interchangeable
MIL-F-18180/2Interchangeable
interchangeable cross-reference
interchangeable
M18180/2-56A01AInterchangeable
interchangeable cross-reference
interchangeable
SW-7302 1 1/2INInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20-1-1/4?
20-1-1/4 is a 20-1-1/4.
What parts can replace 20-1-1/4?
There are 22 known substitutes for 20-1-1/4: B16-5-1953TABLE21, 29513, DH29513 and 19 more. Substitute compatibility should be verified for your specific system.
Is 20-1-1/4 still available?
20-1-1/4 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