M30 Quick-Acting Hatch Cover Cleat with Cam Lock | Snap Lock for Weathertight Ship Hatch Covers

Product Overview

The M30 quick-acting hatch cover cleat is a mechanical securing component used at the side or top of a ship’s main cargo hatch cover. Its cam-lock arrangement draws the cover toward the coaming and helps maintain the specified compression of the hatch cover sealing system during a sea passage. The cleat supports weathertight closing, but it does not create weathertightness by itself; cover alignment, gasket condition, compression bars, bearing pads, cleat spacing, adjustment, and load sharing must all remain within the approved hatch cover arrangement.

This M30 configuration is supplied with a nominal M30 nylon nut, a user-specified Ø32 mm rod, Ø110 mm steel washer, Ø100 mm elastic rubber washer, and available rod lengths of 600, 800, or 1000 mm. Replacement units for MacGregor, TTS, CG, or other hatch cover systems should be produced only after the original drawing, sample, cam profile, installation position, and required adjustment range have been confirmed. The product is supplied as replacement or project-specific equipment and should not be described as an original equipment manufacturer part unless separately authorized.

Quick Specifications

• Product type: M30 snap-lock / quick-acting hatch cover cleat → mechanical clamping component for side-mounted or top-mounted hatch cover securing positions.
• Rod and thread arrangement: Ø32 mm rod with M30 nylon nut → the rod diameter, thread form, thread length, and usable engagement must match the existing cleat arrangement.
• Available nominal lengths: 600 / 800 / 1000 mm → select against the approved hatch cover drawing, coaming geometry, cam position, and required adjustment range.
• Cleat set: cleat rod, cam lock, steel washer, elastic rubber washer, and nut → individual wearing parts can be replaced when dimensions and material specifications are confirmed.
• Rod material: user-specified die-forged 20Cr steel → heat-treatment condition and required mechanical properties are to be confirmed before production.
• Surface treatment: hot-dip galvanizing or painting → final coating, thread protection, and post-treatment dimensional checks should follow the order specification.
• Selection basis: system drawing or confirmed sample → model designation alone is not sufficient for replacement because cam geometry, mounting direction, and gasket compression can differ between hatch cover systems.

Main Technical Parameters

Selection & Inquiry Guide

Step 1: Confirm the hatch cover maker, system type, vessel name or hull number, and whether the cleat is installed at a side, end, cross-joint, or top securing position.

Step 2: Confirm M30 model, Ø32 mm rod, required length 600 / 800 / 1000 mm, thread form and thread length, cam profile, locking direction, washer arrangement, and available adjustment travel.

Step 3: Provide the existing cleat drawing, hatch cover arrangement drawing, or a complete sample. Replacement compatibility should be checked by interface dimensions and function, not by the M30 designation alone.

Step 4: Confirm the required gasket compression, cleat pre-tension or adjustment setting, and load-sharing requirement according to the approved hatch cover design or maker’s maintenance instruction.

Step 5: Confirm rod material and heat treatment, washer material and hardness, nut material, hot-dip galvanizing or paint system, inspection scope, and any classification society requirement.

Step 6: Provide quantity, spare-parts breakdown, packaging requirement, delivery destination, required delivery time, and clear photos of the installed cleat and mating structure.

Structure

Die-forged cleat rod | Cam-lock head | Steel washer | Elastic rubber washer | M30 nylon nut | Threaded adjustment section | Side or top installation interface | Hot-dip galvanized or painted finish

Hatch Cover Securing & Maintenance Advantages

• The cam-lock arrangement provides quick mechanical engagement and release at the hatch cover securing position while retaining an adjustable threaded section for setting the cleat assembly.
• The elastic rubber washer acts as a compliant component within the securing arrangement and helps accommodate limited movement while maintaining the specified compression only when the cleat is correctly adjusted.
• A die-forged rod is suitable for a repeatedly operated mechanical securing component; however, final material condition, heat treatment, mechanical properties, and inspection acceptance should be stated on the purchase specification.
• Replaceable rods, washers, nuts, and cam components support repair and maintenance without automatically requiring replacement of the complete hatch cover system, provided the replacement parts are dimensionally and functionally compatible.
• For replacement projects, the cam profile, locking direction, rod length, thread engagement, and washer stack should be checked together. A mismatch can cause insufficient compression, over-compression, uneven load sharing, or difficult operation.
• Hot-dip galvanizing can improve corrosion protection for exposed components, while painted supply can match the vessel coating system. Threads and mating dimensions should be protected and checked after surface treatment.
• After renewal of cleats, seals, or rubber washers, the securing loads and adjustment across the hatch cover should be rechecked so that one cleat does not carry a disproportionate share of the closing force.
• Routine inspection should focus on rod straightness, thread wear, corrosion wastage, cam wear, nut condition, rubber washer ageing, free movement, and the ability to maintain the approved adjustment.

Custom Attributes

• Model: M30 → selected for the supplied M30 cleat arrangement; compatibility must still be checked by drawing or sample.
• Rod Diameter: Ø32 mm → key replacement dimension for the supplied M30 configuration.
• Length Options: 600 / 800 / 1000 mm → choose according to installation geometry and usable adjustment range.
• Cam Lock: Medium-size cam → exact cam contour, pin / pivot arrangement, and locking direction are to be confirmed.
• Washer Set: Ø110 mm steel washer + Ø100 mm elastic rubber washer → supports the specified clamping and adjustment arrangement.
• Nut: M30 nylon nut → thread pitch, locking function, temperature resistance, and replacement specification should be confirmed.
• Rod Material: Die-forged 20Cr steel → final heat treatment and test requirements are project-specific.
• Surface Treatment: Hot-dip galvanized or painted → specify coating thickness, protected areas, and final thread condition.
• Replacement Basis: Drawing / sample / confirmed dimensions → recommended for MacGregor-, TTS-, CG-, and other maker-type replacement projects without implying OEM authorization.

How It Works

Hatch cover reaches the closed position → Cleat cam is moved into the locking position → Threaded rod and washer stack draw the cover toward the coaming → Elastic washer and adjusted cleat maintain the specified closing compression → All cleats are checked for complete engagement and balanced securing before sailing

Applications

Main cargo hatch covers | Bulk carrier weatherdeck hatch covers | Side-mounted cleating positions | Top-mounted cleating positions | Peripheral and cross-joint securing locations | Newbuilding spare sets | Repair and replacement projects

Certifications & Advantages

Material documentation, inspection records, dimensional reports, and classification society involvement can be arranged according to the agreed order scope, vessel requirement, and approval procedure. Certificate availability is subject to project confirmation and class approval.

Certification: CCS, NK, BV, ABS, DNV, LR, KR, IRS, RS, RINA, CRS, Makers Test Certificate.

Drawing & Photos

FAQ

Q1: Does the M30 cleat alone make the hatch cover weathertight?

A1: No. The cleat helps maintain the specified securing force and gasket compression, but weathertight performance depends on the complete hatch cover system, including panel alignment, gaskets, compression bars, bearing pads, drainage, cleat spacing, adjustment, and load sharing.

Q2: Can this M30 cleat directly replace a MacGregor or TTS cleat?

A2: Only after confirmation. The existing drawing or sample should be checked for rod diameter, thread, effective length, cam profile, locking direction, washer stack, mounting position, adjustment travel, and required compression. Similar-looking M30 cleats are not necessarily interchangeable.

Q3: What should be checked after installation or replacement?

A3: Check full cam engagement, thread engagement, rod alignment, washer and nut seating, free operation, corrosion protection, and equalized cleat adjustment across the hatch cover. Hose, chalk, ultrasonic, or other tightness testing should be carried out only as required by the approved procedure or survey scope.