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Technical Data Sheet
SM-B-157340 ✓ 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 width: 0.375 INCHES NOMINAL IN, length: 0.6875 INCHES NOMINAL IN, material: STEEL, body_thickness: 0.120 INCHES NOMINAL IN, surface_treatment: PHOSPHATE, securing_device_type: THREADED FASTENER. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-521-7181, 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-157340
NSN: 5340-00-521-7181
FSC: 5340
CAGE: 80063 — US ARMY COMMUNICATIONS & ELECTRONICS MATERIEL READINESS COMMAND LOGISTICS ENGINEERING DIR (USA)
SPECIFICATIONS
width0.375 INCHES NOMINAL IN
length0.6875 INCHES NOMINAL IN
materialSTEEL
body_thickness0.120 INCHES NOMINAL IN
surface_treatmentPHOSPHATE
securing_device_typeTHREADED FASTENER
peripheral_shape_styleOVAL, MULTI HOLES
hole_quantity_along_length2
cross-sectional_shape_styleFLAT
mounting_opening_shape_styleTHREADED HOLE
distance_between_holes_along_length0.3075 INCHES MINIMUM AND 0.3175 INCHES MAXIMUM IN
material_document_and_classificationQQ-S-698 FED SPEC SINGLE MATERIAL RESPONSE
NSN5340-00-521-7181
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: SM-B-157340 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
DISTANCE BETWEEN HOLES ALONG LENGTH: 0.3075 INCHES MINIMUM AND 0.3175 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: K-F-1103,CAGEC 80063 MFR REF SINGLE TREATMENT RESPONSE
HOLE QUANTITY ALONG LENGTH: 2
LENGTH: 0.6875 INCHES NOMINAL IN
SURFACE TREATMENT: PHOSPHATE
BODY THICKNESS: 0.120 INCHES NOMINAL IN
MATERIAL: STEEL
WIDTH: 0.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
DISTANCE BETWEEN HOLES ALONG LENGTH0.3075 INCHES MINIMUM AND 0.3175 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONK-F-1103,CAGEC 80063 MFR REF SINGLE TREATMENT RESPONSE
HOLE QUANTITY ALONG LENGTH2
LENGTH0.6875 INCHES NOMINAL IN
SURFACE TREATMENTPHOSPHATE
BODY THICKNESS0.120 INCHES NOMINAL IN
MATERIALSTEEL
WIDTH0.375 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEFLAT
SECURING DEVICE TYPETHREADED FASTENER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
54884Interchangeable
interchangeable cross-reference
interchangeable
B94.9Interchangeable
interchangeable cross-reference
interchangeable
GGG-T-70Interchangeable
interchangeable cross-reference
interchangeable
54884R2Interchangeable
interchangeable cross-reference
interchangeable
D54884Interchangeable
interchangeable cross-reference
interchangeable
5365007929028Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SM-B-157340?
SM-B-157340 is a COVER,ACCESS.
What parts can replace SM-B-157340?
There are 9 known substitutes for SM-B-157340: 54884, B94.9, GGG-T-70 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SM-B-157340?
SM-B-157340 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-521-7181. This indicates validated use in U.S. government and defense supply chains.
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