CAT 0S1616 CAP SCREW for 3512 Caterpillar Part - WSTPARTS

0S1616 CAP SCREW is a Bolt/Nut component engineered for Caterpillar 3512, 3306 and G3508 machines, built to match original factory specifications. It is categorized under Bolt/Nut. Every unit is fitment-verified before dispatch. Manual reference: 3306: FUEL SYSTEM, group 131-5454, page 652; 3406C: COOLING SYSTEM, group 126-8325, page 561.

0S1616 CAP SCREW for Caterpillar 3512 — Genuine & OEM Replacement Part

WSTPARTS supplies genuine and high-quality OEM replacement CAP SCREW (Part # 0S1616). Designed for CAT 3512, 3306, G3508, 3516C, 3406C, 3406E, 3412C, 3512C, 3516, 3606, 3608, 3616, C27, C32, G3616 equipment.

Compatible Models

Key Features

• ✔ 100% compatible with CAT 3512, 3306, G3508, 3516C, 3406C, 3406E, 3412C, 3512C, 3516, 3606, 3608, 3616, C27, C32, G3616
• ✔ Meets Caterpillar original quality and performance standards
• ✔ Genuine CAT parts with anti-counterfeit label | OEM alternatives with warranty
• ✔ Available for order, contact for lead time

Specifications

Part Number (MPN)	0S1616
Product Name	CAP SCREW
Brand	CAT
Applicable Models	3512, 3306, G3508, 3516C, 3406C, 3406E, 3412C, 3512C, 3516, 3606, 3608, 3616, C27, C32, G3616
Weight	0.05 kg
Condition	New (Genuine / OEM Equivalent)
Warranty	12 Months

Where This Part Fits

Every row below is a real listing of 0S1616 in the Caterpillar parts manual: the machine it is published under, the system it belongs to, the group number and the manual page. Use it to confirm the part against your own parts book before ordering.

Machine	System	Group No.	Manual Page
3306	FUEL SYSTEM	131-5454	p.652
3406C	COOLING SYSTEM	126-8325	p.561
3406E	LUBRICATION SYSTEM	140-6325	p.227
3412C	FUEL SYSTEM	108-3797	p.421
3512	BASIC ENGINE	103-6226	p.231
3512C	ELECTRICAL AND STARTING SYSTEM	141-1809	p.246
3516	BASIC ENGINE	523-5086	p.127
3516B	ELECTRICAL AND STARTING SYSTEM	267-2716	p.651

System Notes — FUEL SYSTEM

The fuel system covers the injection pump, injectors, fuel transfer pump, filters and water separator, lines and the tank. It meters and atomises diesel at the precise moment and quantity the engine needs. Modern CAT engines run very tight injector tolerances, so the group is sensitive to water and dirt: a worn injector dribbles instead of atomising, causing rough idle, white smoke and diluted oil, while a clogged filter starves the pump under load. Parts here are replaced when the engine misfires, smokes, loses power under load, or when the water separator keeps tripping — always after the fuel quality itself has been ruled out.

System Notes — COOLING SYSTEM

The cooling system covers the radiator, water pump, thermostat, fan and fan drive, coolant hoses, clamps, the surge tank and the belts that drive it. It holds engine temperature inside the range where clearances and oil film stay correct. Failures are usually slow and then sudden: a hose softens and balloons before it bursts, a water pump seal starts weeping from the weep hole, a thermostat sticks partly open so the engine runs cold and burns more fuel. On construction sites the radiator also packs with dust and debris, which raises pressure across the core and finds the weakest hose or clamp first.

FAQ

Is 0S1616 the right part for my machine?
Match the part number on your old part, or send us your equipment serial number — WSTPARTS verifies fitment free of charge for CAT 3512.

Genuine vs OEM replacement — what is the difference?
Genuine CAT parts carry an anti-counterfeit label. OEM equivalents are built to the same specifications, bench-tested and supplied with full warranty at a better price.

Stock, shipping and warranty?
Lead time confirmed on request; we quote the fastest available option. Every order is covered by a 12-month warranty.

📞 Get a Quote: Contact the WSTPARTS parts team | Email: cat@wstparts.com