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Technical Data Sheet
3174AS4631 ✓ 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 STANDOFF,THREADED,SPACING is a the manufacturer industrial component. Key specifications include length: 0.5000 INCHES NOMINAL IN, material: ALUMINUM STANDOFF, thread_class: 2B LEFT INTERNAL (INCLUDES THRU THREAD), thread_length: 0.3750 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN, style_designator: LEFT INTERNAL AND RIGHT EXTERNAL THREAD, thread_direction: RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-424-3005, 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
3174AS4631
NSN: 5340-01-424-3005
FSC: 5340
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
length0.5000 INCHES NOMINAL IN
materialALUMINUM STANDOFF
thread_class2B LEFT INTERNAL (INCLUDES THRU THREAD)
thread_length0.3750 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) IN
style_designatorLEFT INTERNAL AND RIGHT EXTERNAL THREAD
thread_directionRIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD)
surface_treatmentCHROMATE OVERALL
width_across_flats0.1875 INCHES NOMINAL IN
nominal_thread_size0.1380 INCHES RIGHT EXTERNAL IN
cross-sectional_shapeHEXAGON
right_projection_length0.2500 INCHES NOMINAL IN
thread_quantity_per_inch32 LEFT INTERNAL (INCLUDES THRU THREAD)
NSN5340-01-424-3005
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3174AS4631 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
THREAD DIRECTION: RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD)
THREAD CLASS: 2A RIGHT EXTERNAL A
WIDTH ACROSS FLATS: 0.1875 INCHES NOMINAL IN
MATERIAL: ALUMINUM STANDOFF
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC) RIGHT EXTERNAL
STYLE DESIGNATOR: LEFT INTERNAL AND RIGHT EXTERNAL THREAD
SURFACE TREATMENT: CHROMATE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD)
THREAD CLASS2A RIGHT EXTERNAL A
WIDTH ACROSS FLATS0.1875 INCHES NOMINAL IN
MATERIALALUMINUM STANDOFF
THREAD CLASS2B LEFT INTERNAL (INCLUDES THRU THREAD)
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) RIGHT EXTERNAL
STYLE DESIGNATORLEFT INTERNAL AND RIGHT EXTERNAL THREAD
SURFACE TREATMENTCHROMATE OVERALL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) LEFT INTERNAL (INCLUDES THRU THREAD)
RIGHT PROJECTION DIAMETER0.1380 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
25-504Interchangeable
interchangeable cross-reference
interchangeable
695-9530Interchangeable
interchangeable cross-reference
interchangeable
B25-SCHEDInterchangeable
interchangeable cross-reference
interchangeable
25-0504Interchangeable
interchangeable cross-reference
interchangeable
912571Interchangeable
interchangeable cross-reference
interchangeable
1Q 349051 POS 1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3174AS4631?
3174AS4631 is a STANDOFF,THREADED,SPACING.
What parts can replace 3174AS4631?
There are 8 known substitutes for 3174AS4631: 25-504, 695-9530, B25-SCHED and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3174AS4631?
3174AS4631 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-01-424-3005. This indicates validated use in U.S. government and defense supply chains.
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