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Technical Data Sheet

A3-31 — Technical Data Sheet

✓ 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

CAPACITOR,FIXED,MICA DIELECTRIC. Key specifications include phase: SINGLE, material: PLASTIC POLYAMIDE NYLON, load_type: RESISTIVE, base_style: WIRE LEADS, DOWN, body_width: 1.00 INCHES NOMINAL IN, bulb_style: T (TUBULAR). This part is cataloged in the Federal Logistics Information System under NSN 4730-00-266-0535, 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→ A3-31
NSN: 4730-00-266-0535
FSC: 4730
CAGE: 41947 — MUELLER BRASS CO. (USA)
SPECIFICATIONS
phaseSINGLE
materialPLASTIC POLYAMIDE NYLON
load_typeRESISTIVE
base_styleWIRE LEADS, DOWN
body_width1.00 INCHES NOMINAL IN
bulb_styleT (TUBULAR)
seat_angle45.0 DEGREES FIRST END
circuit_typeBRIDGE
corner_shapeSQUARE ALL CORNERS
thread_class2A FIRST END A
adhesive_typePRESSURE SENSITIVE
inside_length1.25 INCHES NOMINAL IN
NSN4730-00-266-0535
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: A3-31 · 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
•
SEAT ANGLE: 45.0 DEGREES FIRST END
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.312 INCHES FIRST END IN
•
CONNECTION STYLE: FLARED (TUBE) FIRST END
•
THREAD SERIES DESIGNATOR: NPTF SECOND END
•
MATERIAL: COPPER ALLOY OVERALL
•
THREAD CLASS: 2A FIRST END A
•
CONNECTION TYPE: THREADED EXTERNAL TUBE FIRST END
TYPICAL APPLICATIONS
  • RAID cache protection during power loss events
  • Write-back cache enablement for storage controllers
  • Enterprise server data integrity assurance
  • Hot-swap battery/capacitor replacement in production
TECHNICAL CHARACTERISTICS
SEAT ANGLE45.0 DEGREES FIRST END
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.312 INCHES FIRST END IN
CONNECTION STYLEFLARED (TUBE) FIRST END
THREAD SERIES DESIGNATORNPTF SECOND END
MATERIALCOPPER ALLOY OVERALL
THREAD CLASS2A FIRST END A
CONNECTION TYPETHREADED EXTERNAL TUBE FIRST END
CONNECTION STYLEPLAIN (PIPE) SECOND END
NOMINAL THREAD SIZE0.500 INCHES FIRST END IN
NOMINAL THREAD SIZE0.125 INCHES SECOND END IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
S928InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
19R64InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
W48X5InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
A-311InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
SIB-926InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
1111InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A3-31?
A3-31 is a CAPACITOR,FIXED,MICA DIELECTRIC. It is classified as a MRO (MRO_GENERAL).
What parts can replace A3-31?
There are 24 known substitutes for A3-31: S928, 19R64, W48X5 and 21 more. Substitute compatibility should be verified for your specific system.
Is A3-31 still available?
A3-31 is currently cancelled.
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