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Technical Data Sheet
PartsTable / COMPONENT / 5C1
5C1 ✓ 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 KEY,SOCKET HEAD SCREW is a the manufacturer industrial component. Key specifications include material: STEEL WRENCHING SURFACE, blade_length: 3.750 INCHES NOMINAL IN, overall_length: 6.750 INCHES NOMINAL IN, style_designator: SCREWDRIVER HANDLE, surface_treatment: OXIDE OVERALL, wrenching_surface_size: 0.109 INCHES NOMINAL SINGLE END IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-037-2638, 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
5C1
NSN: 5340-00-037-2638
FSC: 5340
CAGE: 43999 — THE BOEING COMPANY DIV LEGACY AM&M (USA)
SPECIFICATIONS
materialSTEEL WRENCHING SURFACE
blade_length3.750 INCHES NOMINAL IN
overall_length6.750 INCHES NOMINAL IN
style_designatorSCREWDRIVER HANDLE
surface_treatmentOXIDE OVERALL
wrenching_surface_size0.109 INCHES NOMINAL SINGLE END IN
wrenching_surface_shapeHEXAGON SINGLE END EXTERNAL
NSN5340-00-037-2638
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 5C1 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
5C1Interchangeable
interchangeable cross-reference
interchangeable
12035Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5C1?
5C1 is a KEY,SOCKET HEAD SCREW.
What parts can replace 5C1?
There are 2 known substitutes for 5C1: 5C1, 12035. Substitute compatibility should be verified for your specific system.
Is 5C1 still available?
5C1 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026