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4189187 — STEP ASSEMBLY,VEHICULAR

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

4189187: STEP ASSEMBLY,VEHICULAR.

The STEP ASSEMBLY,VEHICULAR is a the manufacturer industrial component. Key specifications include width: 1.250 INCHES NOMINAL IN, length: 1.310 INCHES NOMINAL IN, material: STEEL OVERALL, smallest_width: 0.049 INCHES NOMINAL IN, surface_treatment: PLASTIC OVERALL, surface_treatment_document_and_classification: MIL-P-20689,TYPE 1,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-034-2967, 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
4189187
NSN: 5340-01-034-2967
NIINs: 010342967, 016527795
FSC: 5340 — Hardware, Commercial
CAGE: 80212 — BAE SYSTEMS LAND & ARMAMENTS L.P. (USA)
SPECIFICATIONS
width1.250 INCHES NOMINAL IN
length1.310 INCHES NOMINAL IN
materialSTEEL OVERALL
smallest_width0.049 INCHES NOMINAL IN
surface_treatmentPLASTIC OVERALL
surface_treatment_document_and_classificationMIL-P-20689,TYPE 1,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NSN5340-01-034-2967
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 4189187 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: 1.310 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-P-20689,TYPE 1,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SMALLEST WIDTH: 0.049 INCHES NOMINAL IN
•
SURFACE TREATMENT: PLASTIC OVERALL
•
WIDTH: 1.250 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
LENGTH1.310 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-P-20689,TYPE 1,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SMALLEST WIDTH0.049 INCHES NOMINAL IN
SURFACE TREATMENTPLASTIC OVERALL
WIDTH1.250 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
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 4189187?
4189187 is a STEP ASSEMBLY,VEHICULAR.
What is the NSN for 4189187?
4189187 is cataloged in the U.S. Government catalog under NSN 5340-01-034-2967. 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.