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Technical Data Sheet
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26989 ✓ 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 PISTON,PUMP is a the manufacturer industrial component. Key specifications include color: BLACK, overall_depth: 0.405 INCHES MINIMUM IN, inside_diameter: 0.127 INCHES MINIMUM AND 0.129 INCHES MAXIMUM IN, outside_diameter: 0.490 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN, screw_drive_type: HEXAGON SOCKET, special_features: WEAPON SYSTEM ESSENTIAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-756-1049, 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
26989
NSN: 4730-00-756-1049
FSC: 4730
CAGE: 01359 — TRIUMPH THERMAL SYSTEMS - MARYLAND, INC. (USA)
SPECIFICATIONS
colorBLACK
overall_depth0.405 INCHES MINIMUM IN
inside_diameter0.127 INCHES MINIMUM AND 0.129 INCHES MAXIMUM IN
outside_diameter0.490 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN
screw_drive_typeHEXAGON SOCKET
special_featuresWEAPON SYSTEM ESSENTIAL
style_designatorROUND
attachment_methodSETSCREWS
counterbore_depth0.026 INCHES MINIMUM IN
overall_thickness0.480 INCHES MINIMUM AND 0.540 INCHES MAXIMUM IN
nominal_thread_size0.112 INCHES SCREW HOLE IN
counterbore_diameter0.435 INCHES MINIMUM IN
NSN4730-00-756-1049
COMPONENT DIAGRAM
HOSE FITTING — THREAD TYPE IS CRITICAL END A: — STRAIGHT END B: — SPECIFICATIONS Thread: — Material: — Pressure: — PN: 26989 · 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
•
MATERIAL: ALUMINUM ALLOY OVERALL
•
SEAT ANGLE: 37.000 DEGREES ALL ENDS
•
CONNECTION TYPE: THREADED EXTERNAL TUBE ALL ENDS
•
SURFACE TREATMENT: ANODIZE OVERALL
•
NOMINAL OVERALL LENGTH: 2.109 INCHES IN
•
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.750 INCHES ALL ENDS IN
•
NOMINAL THREAD SIZE: 1.062 INCHES ALL ENDS IN
•
CONNECTION STYLE: FLARED (TUBE) ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALALUMINUM ALLOY OVERALL
SEAT ANGLE37.000 DEGREES ALL ENDS
CONNECTION TYPETHREADED EXTERNAL TUBE ALL ENDS
SURFACE TREATMENTANODIZE OVERALL
NOMINAL OVERALL LENGTH2.109 INCHES IN
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.750 INCHES ALL ENDS IN
NOMINAL THREAD SIZE1.062 INCHES ALL ENDS IN
CONNECTION STYLEFLARED (TUBE) ALL ENDS
STYLE DESIGNATORFLARED W/ CENTER WRENCHING FACILITY
THREAD QUANTITY PER INCH12 ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
MS91528-0N1BInterchangeable
interchangeable cross-reference
interchangeable
10360265Interchangeable
interchangeable cross-reference
interchangeable
10194214-01Interchangeable
interchangeable cross-reference
interchangeable
26989Interchangeable
interchangeable cross-reference
interchangeable
26989-5130Interchangeable
interchangeable cross-reference
interchangeable
CS4730-0025Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 26989?
26989 is a PISTON,PUMP.
What parts can replace 26989?
There are 7 known substitutes for 26989: MS91528-0N1B, 10360265, 10194214-01 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 26989?
26989 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4730-00-756-1049. 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