Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW
SEAT,HELICAL COMPRESSION SPRING. Key specifications include material: STEEL, design_type: SOLID, end_diameter: 0.3700 INCHES MINIMUM AND 0.3800 INCHES MAXIMUM IN, bore_diameter: 0.1560 INCHES MINIMUM AND 0.1590 INCHES MAXIMUM IN, overall_height: 0.4720 INCHES MINIMUM AND 0.4920 INCHES MAXIMUM IN, style_designator: SEAT. This product is currently in active production with full OEM support.
This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-787-6424, 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
125-3986
NSN:5340-00-787-6424 FSC:5340 CAGE:93742 — DRS NAVAL POWER SYSTEMS INC DBA DRS POWER & CONTROL TECHNOLOGIES INC (USA)
SPECIFICATIONS
material
STEEL
design_type
SOLID
end_diameter
0.3700 INCHES MINIMUM AND 0.3800 INCHES MAXIMUM IN
bore_diameter
0.1560 INCHES MINIMUM AND 0.1590 INCHES MAXIMUM IN
overall_height
0.4720 INCHES MINIMUM AND 0.4920 INCHES MAXIMUM IN
style_designator
SEAT
surface_treatment
PHOSPHATE
counterbore_length
0.2280 INCHES MINIMUM AND 0.2380 INCHES MAXIMUM IN
first_step_diameter
0.4950 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
chamfer_angle_in_deg
3.0
counterbore_diameter
0.3150 INCHES MINIMUM AND 0.3250 INCHES MAXIMUM IN
NSN
5340-00-787-6424
COMPONENT DIAGRAM
KEY FEATURES
•
COUNTERBORE DIAMETER: 0.3150 INCHES MINIMUM AND 0.3250 INCHES MAXIMUM IN
•
DESIGN TYPE: SOLID
•
COUNTERBORE LENGTH: 0.2280 INCHES MINIMUM AND 0.2380 INCHES MAXIMUM IN
•
END DIAMETER: 0.3700 INCHES MINIMUM AND 0.3800 INCHES MAXIMUM IN
•
SURFACE TREATMENT: PHOSPHATE
•
MATERIAL: STEEL
•
STYLE DESIGNATOR: SEAT
•
CHAMFER ANGLE IN DEG: 3.0
TECHNICAL CHARACTERISTICS (FLIS)
COUNTERBORE DIAMETER
0.3150 INCHES MINIMUM AND 0.3250 INCHES MAXIMUM IN
DESIGN TYPE
SOLID
COUNTERBORE LENGTH
0.2280 INCHES MINIMUM AND 0.2380 INCHES MAXIMUM IN
END DIAMETER
0.3700 INCHES MINIMUM AND 0.3800 INCHES MAXIMUM IN
SURFACE TREATMENT
PHOSPHATE
MATERIAL
STEEL
STYLE DESIGNATOR
SEAT
CHAMFER ANGLE IN DEG
3.0
OVERALL HEIGHT
0.4720 INCHES MINIMUM AND 0.4920 INCHES MAXIMUM IN
FIRST STEP DIAMETER
0.4950 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
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FREQUENTLY ASKED QUESTIONS
What is 125-3986?
125-3986 is a SEAT,HELICAL COMPRESSION SPRING.
What parts can replace 125-3986?
There are 21 known substitutes for 125-3986: 6980, 12210-01, 12210 and 18 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 125-3986?
125-3986 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5340-00-787-6424. This indicates validated use in U.S. government and defense supply chains.
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