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Technical Data Sheet
11438978 ✓ 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 CLAMP,SYNCHRO is a the manufacturer industrial component. Key specifications include width: 0.570 INCHES MINIMUM AND 0.670 INCHES MAXIMUM IN, height: 0.140 INCHES NOMINAL IN, length: 0.380 INCHES NOMINAL IN, material: STEEL, hole_diameter: 0.113 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN, furnished_items: LOCKNUT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-267-1271, 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
11438978
NSN: 5340-01-267-1271
FSC: 5340
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
width0.570 INCHES MINIMUM AND 0.670 INCHES MAXIMUM IN
height0.140 INCHES NOMINAL IN
length0.380 INCHES NOMINAL IN
materialSTEEL
hole_diameter0.113 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
furnished_itemsLOCKNUT
surface_treatmentCADMIUM AND CHROMATE
material_document_and_classificationFED STD 66 FED STD SINGLE MATERIAL RESPONSE
surface_treatment_document_and_classificationQQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE
NSN5340-01-267-1271
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 11438978 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: QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE
HEIGHT: 0.140 INCHES NOMINAL IN
FURNISHED ITEMS: LOCKNUT
MATERIAL: STEEL
HOLE DIAMETER: 0.113 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
LENGTH: 0.380 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66 FED STD SINGLE MATERIAL RESPONSE
WIDTH: 0.570 INCHES MINIMUM AND 0.670 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE
HEIGHT0.140 INCHES NOMINAL IN
FURNISHED ITEMSLOCKNUT
MATERIALSTEEL
HOLE DIAMETER0.113 INCHES MINIMUM AND 0.120 INCHES MAXIMUM IN
LENGTH0.380 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66 FED STD SINGLE MATERIAL RESPONSE
WIDTH0.570 INCHES MINIMUM AND 0.670 INCHES MAXIMUM IN
SURFACE TREATMENTCADMIUM AND CHROMATE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
502-150Interchangeable
interchangeable cross-reference
interchangeable
NP0A22P0RM2-2UUFInterchangeable
interchangeable cross-reference
interchangeable
03167410Interchangeable
interchangeable cross-reference
interchangeable
301-000C0G0220KInterchangeable
interchangeable cross-reference
interchangeable
17B9E3023-571Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 11438978?
11438978 is a CLAMP,SYNCHRO.
What parts can replace 11438978?
There are 5 known substitutes for 11438978: 502-150, NP0A22P0RM2-2UUF, 03167410 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 11438978?
11438978 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-267-1271. This indicates validated use in U.S. government and defense supply chains.
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