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Technical Data Sheet
PartsTable / MRO / 10839
10839 ✓ Verified by PartsTable
Trefl · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

PISTON,HYDRAULIC BRAKE,MASTER CY. Key specifications include material: PAPER AND GLUE AND GLYCERIN OVERALL, bulb_type: PLAIN RIGID, case_type: DUSTPROOF AND VAPORPROOF, bulb_style: PLAIN BULB W/BENDABLE EXTENSION, scale_type: CONCENTRIC, case_diameter: 2.188 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 5330-00-141-1588, 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→ 10839
NSN: 5330-00-141-1588
FSC: 5330
CAGE: 95201 — NAPCO INTERNATIONAL LLC DBA NAPCO INTERNATIONAL INC (USA)
SPECIFICATIONS
materialPAPER AND GLUE AND GLYCERIN OVERALL
bulb_typePLAIN RIGID
case_typeDUSTPROOF AND VAPORPROOF
bulb_stylePLAIN BULB W/BENDABLE EXTENSION
scale_typeCONCENTRIC
bulb_quantity1
case_diameter2.188 INCHES NOMINAL IN
dial_diameter1.750 INCHES NOMINAL IN
hole_diameter0.406 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width0.875 INCHES NOMINAL IN
overall_length5.375 INCHES NOMINAL IN
bulb_tip_length1.532 INCHES NOMINAL IN
NSN5330-00-141-1588
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 10839 MFR: Trefl ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
OUTSIDE DIAMETER: 1.938 INCHES NOMINAL IN
•
CROSS-SECTIONAL THICKNESS: 0.062 INCHES NOMINAL IN
•
APERTURE DIAMETER: 1.031 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR METAL
•
HARDNESS RATING: 85.0 ROCKWELL F MAXIMUM OVERALL
•
STYLE DESIGNATOR: CIRCULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-C-576 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: COPPER ALLOY OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
OUTSIDE DIAMETER1.938 INCHES NOMINAL IN
CROSS-SECTIONAL THICKNESS0.062 INCHES NOMINAL IN
APERTURE DIAMETER1.031 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR METAL
HARDNESS RATING85.0 ROCKWELL F MAXIMUM OVERALL
STYLE DESIGNATORCIRCULAR
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-C-576 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALCOPPER ALLOY OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
MIL-E-1/1338Interchangeable
interchangeable cross-reference
interchangeable
6584Interchangeable
interchangeable cross-reference
interchangeable
5528Interchangeable
interchangeable cross-reference
interchangeable
936Interchangeable
interchangeable cross-reference
interchangeable
AN658F4Interchangeable
interchangeable cross-reference
interchangeable
10839Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 10839?
10839 is a PISTON,HYDRAULIC BRAKE,MASTER CY manufactured by Trefl. It is classified as a MRO (MRO_GENERAL).
What parts can replace 10839?
There are 19 known substitutes for 10839: MIL-E-1/1338, 6584, 5528 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 10839?
10839 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-141-1588. 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.
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Last verified: July 2026