Yuhe 4F3665 plow bolt

Yuhe’s table identifies 4F3665 as a plow bolt and writes 5/8″ UNC-11 × 3-1/2″, with a mass entry of 0.16 kg. [1] Read that designation before comparing a supplier drawing.

ASME’s public B1.1 description covers unified inch thread form, series, class, allowance and tolerances. [3] Nominal diameter and pitch leave part of the specification unresolved. This review does not reproduce paid tolerance tables or certify the bolt to that standard.

Caterpillar’s own 4F-3665 page corroborates the 5/8-11 and 3-1/2-inch reference and describes its cutting-edge system with matched nuts and washers. [2] That is an original reference to consult; it does not prove Yuhe’s bolt is Cat-made, authorised, dimensionally identical or mechanically equivalent.

Cat’s selection depends on equipment configuration. Do not copy its model list into a Yuhe fit guarantee. Where an assembly has changed, reconcile current parts drawings and service requirements before approving a substitute.

The page shows a bolt and nut and uses “BOLT & NUT 4F3665” below the table. [1] It supplies no matched nut designation or complete washer specification. Ask whether the quoted unit is one bolt, a bolt/nut pair or an agreed kit, and list each reference.

Request item-specific material/mechanical requirements, the applicable strength standard/grade, heat-treatment records, finish/coating and lubricant condition. Cat’s carbon-steel and beyond-SAE-Grade-8 statements describe its own product; they are not Yuhe specifications. A neighbouring supplier listing labelled 12.9 is not evidence for this inch bolt.

Exclude the page’s very broad price range and general monthly-supply figure from a purchase calculation. Neither establishes a dated price or availability of this reference in the requested configuration and quantity.

1. Agree the sample basis: use the accepted drawing/revision, composition and inspection plan.
2. Check identity: reconcile part/lot marks and maker documents with the order; define identification on bolts, labels and packages.
3. Verify specified features: record dimensional/thread checks and material/mechanical evidence using agreed methods and acceptance limits.
4. Keep the chain: retain sample approval, lot records, inspection outcomes and packing counts for repeat orders or discrepancies.

The certificate page contains historical documents. [4] No reviewed report identifies a current 4F3665 shipment and its agreed requirements. For the company timeline and manufacturing-branch questions, read the individual Yuhe profile.

CivilEquip has not measured a sample, witnessed heat treatment or performed proof-load, tensile or installation tests. Acceptance limits should come from approved design/procurement requirements, not this catalogue review.

Ask the responsible equipment/assembly supplier for the applicable installation procedure and joint-specific tightening requirements. Identify fastener grade, matched nut/washer, coating/lubrication condition, replacement/reuse policy and relevant inspection or retightening instructions.

No torque is calculated from the 5/8-inch size here. Yuhe’s reviewed page gives no friction assumption, preload target or installation instruction. Do not improvise a universal torque or treat a photograph as permission to reuse damaged mating components.

Agree packing counts, protection, discrepancy reporting and written replacement/support terms. Preserve specification and batch identity when storing fleet spares; later replenishment should not rely only on an unqualified “4F3665” label.