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257701 — TRANSFORMER,POWER

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

257701: TRANSFORMER,POWER.

The TRANSFORMER,POWER is a the manufacturer industrial component. Key specifications include material: STEEL, body_width: 2.125 INCHES NOMINAL IN, body_height: 2.312 INCHES NOMINAL IN, body_length: 3.688 INCHES NOMINAL IN, usage_design: EXTERNAL, inclosure_type: HERMETICALLY SEALED. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-405-0044, 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
257701
NSN: 5340-00-405-0044
NIINs: 004050044, 005602035, 011211090
FSC: 5340 — Hardware, Commercial
CAGE: 3B481 — H.O. BOSTROM COMPANY, INC. DBA HO BOSTROM CO INC (USA)
SPECIFICATIONS
materialSTEEL
body_width2.125 INCHES NOMINAL IN
ring_styleE
body_height2.312 INCHES NOMINAL IN
body_length3.688 INCHES NOMINAL IN
usage_designEXTERNAL
inclosure_typeHERMETICALLY SEALED
inside_diameter0.125 INCHES NOMINAL IN
major_thickness0.015 INCHES NOMINAL IN
mounting_methodUNTHREADED HOLE(S) SINGLE GROUP
frequency_rating60.0 HERTZ NOMINAL SINGLE COMPONENT
special_featuresU-SHAPE CONTROL WITH ATTACHMENT BAR,AND SIX MOUNTING HOLES
NSN5340-00-405-0044
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 257701 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
TECHNICAL CHARACTERISTICS
SPECIAL FEATURESU-SHAPE CONTROL WITH ATTACHMENT BAR,AND SIX MOUNTING HOLES
END ITEM IDENTIFICATION3810-00-763-7728
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 257701?
257701 is a TRANSFORMER,POWER.
What is the NSN for 257701?
257701 is cataloged in the U.S. Government catalog under NSN 5340-00-405-0044. This indicates validated use in U.S. government and defense supply chains.
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