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1128B40735-1 — HOOK,SUPPORT

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

1128B40735-1: HOOK,SUPPORT.

The HOOK,SUPPORT is a the manufacturer industrial component. Key specifications include material: STEEL COMP 301, surface_treatment: PASSIVATE, material_document_and_classification: MIL-S-5059, TYPE 301, 1/2 HARD MIL SPEC 1ST MATERIAL RESPONSE, surface_treatment_document_and_classification: MIL-S-5002 MIL SPEC 1ST TREATMENT RESPONSE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-273-0135, 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
1128B40735-1
NSN: 5340-01-273-0135
FSC: 5340 — Hardware, Commercial
CAGE: 0BVP9 — CAPY MACHINE SHOP INC. DBA CAPY MACHINE SHOP INC (USA)
SPECIFICATIONS
materialSTEEL COMP 301
surface_treatmentPASSIVATE
material_document_and_classificationMIL-S-5059, TYPE 301, 1/2 HARD MIL SPEC 1ST MATERIAL RESPONSE
surface_treatment_document_and_classificationMIL-S-5002 MIL SPEC 1ST TREATMENT RESPONSE
NSN5340-01-273-0135
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1128B40735-1 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
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-S-5002 MIL SPEC 1ST TREATMENT RESPONSE
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-S-5059, TYPE 301, 1/2 HARD MIL SPEC 1ST MATERIAL RESPONSE
•
SURFACE TREATMENT: PASSIVATE
•
MATERIAL: STEEL COMP 301
TECHNICAL CHARACTERISTICS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-S-5002 MIL SPEC 1ST TREATMENT RESPONSE
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5059, TYPE 301, 1/2 HARD MIL SPEC 1ST MATERIAL RESPONSE
SURFACE TREATMENTPASSIVATE
MATERIALSTEEL COMP 301
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

No substitute or cross-reference records for this part.

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 1128B40735-1?
1128B40735-1 is a HOOK,SUPPORT.
What is the NSN for 1128B40735-1?
1128B40735-1 is cataloged in the U.S. Government catalog under NSN 5340-01-273-0135. 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.