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Technical Data Sheet
PartsTable / MRO / A2-40
A2-40 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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

RESISTOR,VARIABLE,WIRE WOUND,PRE. Key specifications include material: NON-WOVEN FABRIC, body_style: AXIAL TERMINAL TYPE, body_width: 1.500 INCHES NOMINAL IN, body_height: 0.500 INCHES MAXIMUM IN, body_length: 1.500 INCHES NOMINAL IN, shaft_style: 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 4730-00-057-8574, 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
MRO→ MRO_GENERAL→ A2-40
NSN: 4730-00-057-8574
FSC: 4730
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialNON-WOVEN FABRIC
body_styleAXIAL TERMINAL TYPE
body_width1.500 INCHES NOMINAL IN
body_height0.500 INCHES MAXIMUM IN
body_length1.500 INCHES NOMINAL IN
shaft_styleROUND
barrel_styleSTRAIGHT ROUND TYPE
bearing_typeBEARING SHAFT
flange_shapeROUND WITH HOLES FIRST END
flange_styleFLANGE
pilot_length0.0750 INCHES MINIMUM IN
shaft_length0.500 INCHES NOMINAL IN
NSN4730-00-057-8574
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: A2-40 · 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
•
OPERATING PRESSURE: 1000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
BOLT CIRCLE NOMINAL DIAMETER: 4.438 INCHES FIRST END IN
•
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED: 2.500 INCHES SECOND END IN
•
RAISED FACE NOMINAL HEIGHT: 0.062 INCHES FIRST END IN
•
NOMINAL OUTSIDE DIAMETER HOSE ACCOMMODATED: 3.300 INCHES SECOND END IN
•
NOMINAL OUTSIDE DIAMETER: 5.560 INCHES FIRST END IN
•
FURNISHED ITEMS AND QUANTITY: 4 BOLT AND 4 LOCKNUT AND 2 SOCKET SEGMENT
•
RAISED FACE NOMINAL DIAMETER: 2.240 INCHES FIRST END IN
TECHNICAL CHARACTERISTICS (FLIS)
OPERATING PRESSURE1000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
BOLT CIRCLE NOMINAL DIAMETER4.438 INCHES FIRST END IN
NOMINAL INSIDE DIAMETER HOSE ACCOMMODATED2.500 INCHES SECOND END IN
RAISED FACE NOMINAL HEIGHT0.062 INCHES FIRST END IN
NOMINAL OUTSIDE DIAMETER HOSE ACCOMMODATED3.300 INCHES SECOND END IN
NOMINAL OUTSIDE DIAMETER5.560 INCHES FIRST END IN
FURNISHED ITEMS AND QUANTITY4 BOLT AND 4 LOCKNUT AND 2 SOCKET SEGMENT
RAISED FACE NOMINAL DIAMETER2.240 INCHES FIRST END IN
MATERIALNICKEL ALLOY BOLT
MATERIALNICKEL ALLOY NUT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
1890768-1Interchangeable
interchangeable cross-reference
interchangeable
A240Interchangeable
interchangeable cross-reference
interchangeable
A230Interchangeable
interchangeable cross-reference
interchangeable
FC9527-3240-189Interchangeable
interchangeable cross-reference
interchangeable
4730PL1256379Interchangeable
interchangeable cross-reference
interchangeable
0120067Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A2-40?
A2-40 is a RESISTOR,VARIABLE,WIRE WOUND,PRE. It is classified as a MRO (MRO_GENERAL).
What parts can replace A2-40?
There are 17 known substitutes for A2-40: 1890768-1, A240, A230 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A2-40?
A2-40 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-057-8574. 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