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ST40C-125-1900-S — BAND,RETAINING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

ST40C-125-1900-S: BAND,RETAINING.

The BAND,RETAINING is a the manufacturer industrial component. Key specifications include width: 1.250 INCHES NOMINAL IN, length: 2.500 INCHES NOMINAL IN, material: STEEL COMP 301, end_style: EXTENDED TONGUE W/T-BOLT, thickness: 0.025 INCHES NOMINAL IN, loop_radius: 0.125 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-291-7280, 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
ST40C-125-1900-S
NSN: 5340-01-291-7280
FSC: 5340 — Hardware, Commercial
CAGE: 14242 — VOSS INDUSTRIES, LLC (USA)
SPECIFICATIONS
width1.250 INCHES NOMINAL IN
length2.500 INCHES NOMINAL IN
materialSTEEL COMP 301
end_styleEXTENDED TONGUE W/T-BOLT
thickness0.025 INCHES NOMINAL IN
loop_radius0.125 INCHES NOMINAL IN
thread_size0.250-25
basic_shape_styleANGLED
material_document_and_classificationMIL-S-5059, COMP 301, COND 1/2 HARD MIL SPEC SINGLE MATERIAL RESPONSE
NSN5340-01-291-7280
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: ST40C-125-1900-S 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
•
LENGTH: 2.500 INCHES NOMINAL IN
•
END STYLE: SOLID LOOP
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5059, COMP 301, COND 1/2 HARD MIL SPEC SINGLE MATERIAL RESPONSE
•
LOOP RADIUS: 0.125 INCHES NOMINAL IN
•
BASIC SHAPE STYLE: ANGLED
•
THREAD SIZE: 0.250-25
•
WIDTH: 1.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
LENGTH2.500 INCHES NOMINAL IN
END STYLESOLID LOOP
END STYLEEXTENDED TONGUE W/T-BOLT
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5059, COMP 301, COND 1/2 HARD MIL SPEC SINGLE MATERIAL RESPONSE
LOOP RADIUS0.125 INCHES NOMINAL IN
BASIC SHAPE STYLEANGLED
THREAD SIZE0.250-25
WIDTH1.250 INCHES NOMINAL IN
MATERIALSTEEL COMP 301
THICKNESS0.025 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 2
GC501N-B1900Reference document
Same NSN cross-reference
Reference document — Secondary reference
2434-125-1900Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST40C-125-1900-S?
ST40C-125-1900-S is a BAND,RETAINING.
What parts can replace ST40C-125-1900-S?
There are 2 known substitutes for ST40C-125-1900-S: GC501N-B1900, 2434-125-1900. Substitute compatibility should be verified for your specific system.
What is the NSN for ST40C-125-1900-S?
ST40C-125-1900-S is cataloged in the U.S. Government catalog under NSN 5340-01-291-7280. 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.