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X9994A — PISTON,CLUTCH SHAFT ASSEMBLY

✓ Government record, cited
— · HOSE FITTING
PRODUCT OVERVIEW

X9994A: PISTON,CLUTCH SHAFT ASSEMBLY.

The PISTON,CLUTCH SHAFT ASSEMBLY is a the manufacturer industrial component. Key specifications include material: IRON, thickness: 0.562 INCHES NOMINAL IN, neck_height: 0.500 INCHES NOMINAL IN, total_ratio: 2.470 TO 1, flange_diameter: 6.125 INCHES NOMINAL IN, style_designator: ROUND, ONE BOLT HOLE CIRCLE. This part is cataloged in the U.S.

Government catalog under NSN 4730-00-256-8589, 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
X9994A
NSN: 4730-00-256-8589
NIINs: 002568589, 013492357, 013533013
FSC: 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
materialIRON
thickness0.562 INCHES NOMINAL IN
neck_height0.500 INCHES NOMINAL IN
total_ratio2.470 TO 1
flange_diameter6.125 INCHES NOMINAL IN
style_designatorROUND, ONE BOLT HOLE CIRCLE
bolt_hole_diameter0.562 INCHES NOMINAL IN
bolt_hole_quantity6
lubrication_systemOIL BATH
nominal_thread_size2.500 INCHES IN
bolt_circle_diameter5.000 INCHES NOMINAL IN
flange_section_stylePLAIN FACE, RAISED NECK
NSN4730-00-256-8589
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: X9994A · 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 DIAMETER: 6.125 INCHES NOMINAL IN
•
FACE SEATING SURFACE CONDITION: MACHINED
•
NOMINAL PIPE SIZE FOR WHICH DESIGNED: 2.500 INCHES IN
•
OPERATING PRESSURE AND TYPE: 100.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
•
FLANGE SECTION STYLE: PLAIN FACE, RAISED NECK
•
STYLE DESIGNATOR: ROUND, ONE BOLT HOLE CIRCLE
•
BOLT HOLE DIAMETER: 0.562 INCHES NOMINAL IN
•
NECK HEIGHT: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE DIAMETER6.125 INCHES NOMINAL IN
FACE SEATING SURFACE CONDITIONMACHINED
NOMINAL PIPE SIZE FOR WHICH DESIGNED2.500 INCHES IN
OPERATING PRESSURE AND TYPE100.0 POUNDS PER SQUARE INCH (PSI) STEAM MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS
FLANGE SECTION STYLEPLAIN FACE, RAISED NECK
STYLE DESIGNATORROUND, ONE BOLT HOLE CIRCLE
BOLT HOLE DIAMETER0.562 INCHES NOMINAL IN
NECK HEIGHT0.500 INCHES NOMINAL IN
NOMINAL THREAD SIZE2.500 INCHES IN
NONDEFINITIVE SPEC/STD DATAA TYPE AND 1 CLASS
SUBSTITUTES & CROSS-REFERENCES 3
X9994A ITEM B3327AReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
MIL-F-20668TYPEACLASS1Reference document
Same NSN cross-reference
Reference document — Identification reference
B3327AReference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is X9994A?
X9994A is a PISTON,CLUTCH SHAFT ASSEMBLY.
What parts can replace X9994A?
There are 3 known substitutes for X9994A: X9994A ITEM B3327A, MIL-F-20668TYPEACLASS1, B3327A. Substitute compatibility should be verified for your specific system.
What is the NSN for X9994A?
X9994A is cataloged in the U.S. Government catalog under NSN 4730-00-256-8589. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.