Original SANY Bolt Hexagon 61000177 Construction Machinery Parts

The genuine SANY parts reference 61000177 is the Bolt, Hexagon, a high-strength fastener designed for demanding bolted connections in SARY heavy construction equipment. The 61000177 hexagon bolt features a precision-formed head and rolled threads, providing reliable clamping force for engine mounts, chassis components, and attachment points.

Manufactured from alloy steel (property class 10.9) with a zinc-flake coating, this bolt delivers excellent tensile strength and corrosion resistance. Each 61000177 unit is 100% inspected for thread accuracy, head dimensions, and hardness, ensuring consistent performance in SRT dump trucks, SY excavators, SW loaders, and motor graders.

Bolt, Hexagon

Болт с шестигранной головкой

Perno hexagonal

Material and Design of Bolt, Hexagon 61000177

The hexagon bolt 61000177 is forged from chromium-molybdenum alloy steel (SCM435 or 35CrMo), quenched and tempered to property class 10.9 per ISO 898-1. Minimum tensile strength is 1040 MPa, yield strength 940 MPa, with hardness 32-39 HRC. The bolt is fully threaded from near the head to the end, providing maximum thread engagement for varying material thicknesses.

The hex head of 61000177 conforms to ISO 4014/4017 with standard height (0.7 x nominal diameter) and width across flats (1.5 x nominal diameter). Threads are rolled after heat treatment to improve fatigue resistance and grain flow. Thread tolerance is 6g, with a chamfered point to facilitate nut starting. The bolt has no washer face or flange – it is intended for use with separate flat washers where needed.

Surface coating is a zinc-flake system (Geomet 500 or Delta Protekt) with integrated lubricant, thickness 8-12 µm. It provides 480 hours of neutral salt spray resistance (ASTM B117) without red rust. The lubricant ensures a stable friction coefficient of µ=0.12-0.16 for accurate torque-tension control. Each 61000177 bolt is laser-marked with “10.9” and a batch code for traceability.

All 61000177 bolts are 100% inspected: thread go/no-go, head height, across-flats dimension, and hardness Rockwell. A sample from each heat treat lot is proof load tested (e.g., 94 kN for M12) with no permanent set. Magnetic particle inspection detects surface cracks. Full traceability is maintained from raw material to final packaging.

Critical Applications of Bolt 61000177 in SANY Machinery

The hexagon bolt 61000177 is specified for high-stress joints where grade 8.8 is insufficient. Typical applications include engine mount brackets, transmission mounting bolts, suspension component fasteners, and axle housing attachments on SRT dump trucks. On SY excavators, this bolt secures the boom foot pivot pins and track frame components.

In SANY diesel engines (D07/D09/D12 series), 61000177 bolts are used for main bearing cap bolts, flywheel housing attachment, and water pump mounting. For these applications, the 10.9 strength provides a higher safety margin under dynamic loads. The bolt is also used on hydraulic cylinder mounting brackets and outrigger legs on concrete pump trucks.

For torque-to-yield applications (e.g., cylinder head bolts), consult the SANY workshop manual. The 61000177 bolt is not designed for yield tightening unless specifically noted. Always use new bolts for critical engine internal joints. Do not substitute with a lower grade fastener – joint failure could result.

Compatible SANY Models & Interchange Information

The bolt 61000177 is used across SANY’s heavy equipment line: SRT45 to SRT115 dump trucks; SY215 to SY500H excavators; SW305, SW405, SW465 wheel loaders; SMG200/220 motor graders; and STC crawler cranes. It also appears on SANY concrete pump trucks, reach stackers, and heavy forklifts.

Common thread sizes for 61000177 include M10x1.5, M12x1.75, M14x2.0, and M16x2.0, with lengths from 20 mm to 150 mm. The part number as listed represents a specific length and thread configuration – always verify using the SANY parts catalog or measure the original bolt. This bolt is fully threaded, unlike partial-thread bolts (ISO 4014).

For fleet maintenance, standardize on genuine 61000177 bolts to guarantee grade 10.9 strength and consistent coating. Aftermarket bolts often claim 10.9 but lack proper heat treatment or have poor plating. Genuine SANY bolts provide reliable proof load and corrosion protection in demanding environments.

Technical Specifications – Hexagon Bolt 61000177

Proper Installation of Hexagon Bolt 61000177

Before installing the bolt 61000177, clean the threaded hole and remove old threadlocker or debris. Do not use damaged bolts with crossed threads or deformed heads. For critical joints, apply a medium-strength threadlocker (e.g., Loctite 243). The zinc-flake coating already provides some lubrication, so no additional oil is needed unless specified.

Use a calibrated torque wrench. Typical torque values for grade 10.9 bolts: M10: 60 Nm, M12: 110 Nm, M14: 170 Nm, M16: 270 Nm. Tighten in a cross pattern for multi-bolt joints. For torque-to-yield applications (rare for this part), follow the SANY manual for angle tightening. Do not exceed recommended torque – over-tightening can cause thread stripping or bolt fracture.

For joints subject to vibration or thermal cycling (e.g., exhaust manifolds), re-torque after 100 operating hours. If a bolt loosens more than 10% of initial torque, replace it – the thread coating may have worn. Never reuse bolts that have been over-torqued beyond yield. Use new 61000177 bolts for engine internal applications.

Store genuine 61000177 bolts in a clean, dry environment. The zinc-flake coating is durable but can be scratched by abrasion. If the coating is damaged (bare steel visible), do not use the bolt in corrosive environments. Always order sufficient quantity to complete the entire joint set.

Symptoms of a Damaged or Incorrect Bolt 61000177

A loose 61000177 bolt will cause knocking sounds, visible movement between parts, or fluid seepage from gasketed joints. On engine mounts, a loose bolt may cause excessive vibration felt in the cab. On axle housings, it can lead to wheel misalignment and uneven tire wear. Re‑torque to specification; if the bolt continues to loosen, replace it and use threadlocker.

Over‑torqued bolts may show thread necking (reduced diameter under the head) or a twisted shank. A bolt that has been stretched past yield will have reduced clamp load and may snap under normal service. If you feel the torque wrench “spinning” without increasing torque, stop immediately. Replace the bolt and inspect the threaded hole for damage.

Corrosion (red rust) on the bolt shank or under the head indicates coating failure. This weakens the cross-section and can cause seizure. Replace all corroded bolts on that joint. For heavy rust, also inspect the mating flange and replace if pitted. Always use genuine 61000177 bolts for replacement – never mix grades on the same joint.

Quality Assurance & Full Traceability for 61000177

Every hexagon bolt 61000177 is produced in an IATF 16949 certified facility under SANY’s quality system. Production steps include wire rod analysis, cold heading, thread rolling, heat treatment (quench and temper), and zinc‑flake coating. In‑process checks monitor hardness, case depth (if applicable), and decarburization depth.

Final inspection includes 100% optical sorting for head geometry, thread presence, and overall length. A sample from each batch (5000 pieces) is proof load tested (e.g., 94 kN for M12) and must show no permanent set. Coating thickness is verified using XRF. A laser‑etched batch code on the bolt head provides traceability to material cert, heat treat graph, and coating line.

For bulk orders, SANY supplies a Certificate of Conformance (CoC) confirming that all 61000177 bolts meet ISO 898-1 class 10.9, ISO 4017 dimensions, and ISO 10683 coating requirements. Independent third‑party audits ensure compliance with ISO 9001:2015 and IATF 16949. Trust only genuine SANY fasteners for safety‑critical joints.

Field Performance of Genuine SANY Hexagon Bolt

Field data from SANY equipment operating in Australian mines and Brazilian construction sites shows that genuine 61000177 bolts maintain clamp load for over 10,000 hours in high-vibration environments. The 10.9 grade provides twice the strength of ordinary 8.8 bolts, resisting fatigue failure in suspension and powertrain mounts.

Aftermarket bolts claiming 10.9 often fail within 2,000-3,000 hours due to improper heat treatment, resulting in brittle fracture or low proof load. Genuine 61000177 bolts exhibit consistent hardness and tensile strength, with no reported shank fractures in normal service. Fleet owners report that standardizing on genuine SANY bolts eliminates broken fastener issues.

To maximize service life, always replace bolts that have been removed from critical joints (e.g., main bearing caps) with new 61000177 fasteners. For non-critical joints, bolts may be reused if they show no signs of stretching or corrosion. Inspect at every major service (2,000 hours) and replace any bolt with visible rust or thread damage. Following these practices ensures reliable equipment operation.