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Technical Data Sheet
PartsTable / COMPONENT / SM-B-321383
SM-B-321383 ✓ 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 COVER,ACCESS is a the manufacturer industrial component. Key specifications include material: STEEL COMP B1113, body_thickness: 0.171 INCHES NOMINAL IN, flange_thickness: 0.059 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN, outside_diameter: 0.781 INCHES NOMINAL IN, surface_treatment: PHOSPHATE, securing_device_type: SPECIAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-649-7699, 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
SM-B-321383
NSN: 5340-00-649-7699
FSC: 5340
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
materialSTEEL COMP B1113
body_thickness0.171 INCHES NOMINAL IN
flange_thickness0.059 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
outside_diameter0.781 INCHES NOMINAL IN
surface_treatmentPHOSPHATE
securing_device_typeSPECIAL
peripheral_shape_styleROUND, ONE HOLE
cross-sectional_shape_styleFLAT, ROUND RIB REINFORCED
bolt_hole_centerline_to_nearest_edge_distance0.390 INCHES NOMINAL IN
surface_treatment_document_and_classificationMIL-F-14072,E211 MIL SPEC SINGLE TREATMENT RESPONSE
NSN5340-00-649-7699
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SM-B-321383 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
•
SECURING DEVICE TYPE: SPECIAL
•
OUTSIDE DIAMETER: 0.781 INCHES NOMINAL IN
•
MATERIAL: STEEL COMP B1113
•
SURFACE TREATMENT: PHOSPHATE
•
BODY THICKNESS: 0.171 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-F-14072,E211 MIL SPEC SINGLE TREATMENT RESPONSE
•
PERIPHERAL SHAPE STYLE: ROUND, ONE HOLE
•
FLANGE THICKNESS: 0.059 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
SECURING DEVICE TYPESPECIAL
OUTSIDE DIAMETER0.781 INCHES NOMINAL IN
MATERIALSTEEL COMP B1113
SURFACE TREATMENTPHOSPHATE
BODY THICKNESS0.171 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-F-14072,E211 MIL SPEC SINGLE TREATMENT RESPONSE
PERIPHERAL SHAPE STYLEROUND, ONE HOLE
FLANGE THICKNESS0.059 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLEFLAT, ROUND RIB REINFORCED
BOLT HOLE CENTERLINE TO NEAREST EDGE DISTANCE0.390 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
4001/630-19/64Interchangeable
interchangeable cross-reference
interchangeable
215-429AInterchangeable
interchangeable cross-reference
interchangeable
712-000918Interchangeable
interchangeable cross-reference
interchangeable
60019Interchangeable
interchangeable cross-reference
interchangeable
6001-3RInterchangeable
interchangeable cross-reference
interchangeable
60019-4283Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SM-B-321383?
SM-B-321383 is a COVER,ACCESS.
What parts can replace SM-B-321383?
There are 7 known substitutes for SM-B-321383: 4001/630-19/64, 215-429A, 712-000918 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SM-B-321383?
SM-B-321383 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-649-7699. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026