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20-3/4 ASTMA-10 — Technical Data Sheet

✓ 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

CAPACITOR,VARIABLE,AIR DIELECTRI. Key specifications include material: STEEL, thickness: 0.500 INCHES NOMINAL IN, neck_height: 0.125 INCHES NOMINAL IN, socket_depth: 0.440 INCHES NOMINAL IN, flange_diameter: 3.875 INCHES NOMINAL IN, socket_diameter: 1.090 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-023-7770, 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
20-3/4 ASTMA-10
NSN: 4730-01-023-7770
FSC: 4730
CAGE: 34646 — ATI LADISH LLC DBA ATI WAH CHANG DIV ATI FORGED PRODUCTS - CUDAHY (USA)
SPECIFICATIONS
materialSTEEL
thickness0.500 INCHES NOMINAL IN
neck_height0.125 INCHES NOMINAL IN
socket_depth0.440 INCHES NOMINAL IN
flange_diameter3.875 INCHES NOMINAL IN
socket_diameter1.090 INCHES NOMINAL IN
special_featuresFLANGES CONFORM TO ASA STANDARD B16.5
style_designatorROUND, ONE BOLT HOLE CIRCLE
surface_treatmentPAINT
bolt_hole_diameter0.620 INCHES NOMINAL IN
bolt_hole_quantity4
raised_face_height0.062 INCHES NOMINAL IN
NSN4730-01-023-7770
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 20-3/4 ASTMA-10 · 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
•
FLANGE SECTION STYLE: RAISED FACE, SOCKET NECK
•
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
•
STYLE DESIGNATOR: ROUND, ONE BOLT HOLE CIRCLE
•
BOLT HOLE DIAMETER: 0.620 INCHES NOMINAL IN
•
RAISED FACE HEIGHT: 0.062 INCHES NOMINAL IN
•
SURFACE TREATMENT: PAINT
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A181,GRADE 1 ASSN STD SINGLE MATERIAL RESPONSE
•
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED: 400.0 FAHRENHEIT GAS AND 400.0 FAHRENHEIT OIL AND 400.0 FAHRENHEIT WATER DEGF
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 (FLIS)
FLANGE SECTION STYLERAISED FACE, SOCKET NECK
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
STYLE DESIGNATORROUND, ONE BOLT HOLE CIRCLE
BOLT HOLE DIAMETER0.620 INCHES NOMINAL IN
RAISED FACE HEIGHT0.062 INCHES NOMINAL IN
SURFACE TREATMENTPAINT
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A181,GRADE 1 ASSN STD SINGLE MATERIAL RESPONSE
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED400.0 FAHRENHEIT GAS AND 400.0 FAHRENHEIT OIL AND 400.0 FAHRENHEIT WATER DEGF
FLANGE DIAMETER3.875 INCHES NOMINAL IN
THICKNESS0.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
2951Interchangeable
interchangeable cross-reference
interchangeable
711498-36Interchangeable
interchangeable cross-reference
interchangeable
442-0043-004Interchangeable
interchangeable cross-reference
interchangeable
174-136Interchangeable
interchangeable cross-reference
interchangeable
MC2951Interchangeable
interchangeable cross-reference
interchangeable
F57826Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20-3/4 ASTMA-10?
20-3/4 ASTMA-10 is a CAPACITOR,VARIABLE,AIR DIELECTRI.
What parts can replace 20-3/4 ASTMA-10?
There are 23 known substitutes for 20-3/4 ASTMA-10: 2951, 711498-36, 442-0043-004 and 20 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20-3/4 ASTMA-10?
20-3/4 ASTMA-10 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-01-023-7770. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: September 2026