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PartsTable / COMPONENT / 25774-1
25774-1 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The STOP,MECHANICAL is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, design_type: STRAIGHT, overall_width: 1.500 INCHES NOMINAL IN, overall_height: 0.500 INCHES NOMINAL IN, overall_length: 4.220 INCHES NOMINAL IN, special_features: 3 MTG HOLES 2-0.443 IN. NOM DIA 1-0.515 IN.

NOM DIA 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 5340-01-381-2308, 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
25774-1
NSN: 5340-01-381-2308
FSC: 5340
CAGE: 92878 — HDT EXPEDITIONARY SYSTEMS INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY
design_typeSTRAIGHT
overall_width1.500 INCHES NOMINAL IN
overall_height0.500 INCHES NOMINAL IN
overall_length4.220 INCHES NOMINAL IN
special_features3 MTG HOLES 2-0.443 IN. NOM DIA 1-0.515 IN. NOM DIA IN
NSN5340-01-381-2308
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 25774-1 MFR: OEM ⚠ 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
•
DESIGN TYPE: STRAIGHT
•
MATERIAL: COPPER ALLOY
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL HEIGHT0.500 INCHES NOMINAL IN
OVERALL WIDTH1.500 INCHES NOMINAL IN
DESIGN TYPESTRAIGHT
SPECIAL FEATURES3 MTG HOLES 2-0.443 IN. NOM DIA 1-0.515 IN. NOM DIA IN
OVERALL LENGTH4.220 INCHES NOMINAL IN
MATERIALCOPPER ALLOY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
MILL3976Interchangeable
interchangeable cross-reference
interchangeable
928570Interchangeable
interchangeable cross-reference
interchangeable
7261919Interchangeable
interchangeable cross-reference
interchangeable
25774Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 25774-1?
25774-1 is a STOP,MECHANICAL.
What parts can replace 25774-1?
There are 4 known substitutes for 25774-1: MILL3976, 928570, 7261919 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 25774-1?
25774-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-381-2308. 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