Are you looking for heavy-duty drawstring cord locks for industrial applications that demand greater holding strength and dependable performance? See our offers below.
Find Heavy-Duty Drawstring Cord Locks
B-LOK®-2L P/N 303-0020-2076 (White) and B-LOK®-2L P/N 303-0020-1818 (Black)
Packed 2500 sets per carton of a given color, these drawstring closures feature a new integral 'shim rib' on the slide that keeps them locked even when the cords are in a no-load mode. Made of Delrin (Acetal) and stocked in opaque black and white colors, it’s highly recommended for the dual ends of a drawstring on flotation vests, small laundry, duffle bags, and miscellaneous wearing apparel.
Installation Instructions
Thread the cords through the cage at the end opposite the tab. Snap the slide into the cage at the tab end. Slide the lock against the load and push the slide inward to lock. Firmly tie the ends of the cord together. To unlock, hold the cage with one hand, pull the slide outward with the other, and slide the whole lock away from the load as desired.
Recommended Load on the Lock: ≤ 25lbs. 1/16" ≤
Cord Size: ≤ 1/8", based on the recommended soft, flexible braided cords.
B-LOK®-3C P/N 303-0030-6015 (White) and B-LOK®-3C P/N 303-0030-6025 (Black)
Packed 2500 sets per carton of a given color with pat. no. 8321999, these closures have self-lock features and stays that way even with surrounding tension. They have a lower center-of-gravity appearance that prevents confusion with inferior knockoffs. The spring arms with squeeze tabs and narrow shaft allow for threading on new cords without removing the slide from the cage. The extra rib added to the cage notches at the bottom so the cage will lie flat when the cords are under tension.
Stocked in opaque black or white polypro, these closures are recommended for the dual ends of a drawstring on larger bags, including laundry, duffel, and sleeping models, as tie-downs for luggage, ladders, and other cargo, soccer ball tethers, etc. The end of the slide can also accommodate a lanyard for remote opening or discharge.
Installation Instructions
Thread the cords through the throat of the cage. Snap the slide into the cage. To enhance the self-locking action and keep the cords in the locked position even without tension in the cords, optionally thread the cords through the side channels provided in the new ring pull.
Recommended Load on the Lock: ≤ 35lbs. 1/8" ≤
Cord Size: ≤ 3/16", based on the recommended soft, flexible braided cords.
B-LOK®-4A
B-LOK®-4A has been discontinued. Please use B-LOK®- 1B.
B-LOK®-5CHD
Considered the world’s best FIBC cord lock for higher-end flexible intermediate bulk containers, the B-LOK®-5CHD comes packed at 500 sets per carton under pat. no. 8321999. It self-locks and stays that way even without tension. The lower center-of-gravity appearance helps avoid confusion with the inferior knockoffs, while its spring arms with squeeze tabs and narrow shaft allow for re-threading on new cords without removing the slide from the cage. The additional rib on the cage plus beefed-up notches at the bottom so the cage lies flat when the cords are under tension.
Essentially, the B-LOK®-5CHD is a larger, heavier-duty version of the -3C, but stocked in opaque UV-stabilized Manila Polypro per carton. This is also the latest version of the original B-LOK-5 drawstring cord closure, as it can resist breaking under prolonged high-load and high-heat conditions better than all the previous models, and is less likely to unlock accidentally.
Installation Instructions
This closure is installed the same way as the -3C model. Keep in mind that optionally threading the cords through the side channels in the ring pull further aids the self-locking action and keeps the cords in the locked position even without tension in the cords.
The B-LOK®-5CHD is recommended for large bulk bags, rigging for sailboats, tents, trees, and other heavy-duty industrial applications. As before, the end of its slide can accommodate a lanyard for remote opening.
Recommended Load on the Lock: ≤ 75lbs. 3/16" ≤
Cord Size: ≤ 1/4", based on the recommended soft, flexible braided cords.
B-LOK®-6A P/N 303-0060-1618 (BLACK)
Packed at 100 units per carton, this is the lightweight, low-cost substitute for a metal postal rope lock. It’s the best plastic tamper-resistant rope lock for mail, bank, and courier bags. Stocked in black (acetal), the single leaf springs of the B-LOK®-6A P/N 303-0060-1618 have been replaced by sawtooth springs with virtually no permanent set. Side notches are also added at the bottom sides of the cage so it will lie flat against the load when there is tension in the cords.
The original drawstring bags are beginning to make a comeback against the current trend of zipper bags, which users are discovering have to be thrown out when the zippers are damaged in normal shipping and handling procedures. Drawstrings, meanwhile, can be easily replaced without having to throw away the entire bag. Thus, the sooner you settle for the inexpensive plastic B-LOK-6A, the sooner you will begin saving.
Installation Instructions
To install, start with the slide completely separated from the cage. Thread the cords through the cage, then insert the slide in the cage to the intermediate position, which will be confirmed by a 'clicking' sound.
Operation Instructions
To operate, slip the standard-size address label (1"x3.3") into the recessed area of the cage. Holding the cords firmly in one hand, use the other to slide the lock all the way inward to completely close the mouth of the bag, then push the slide all the way into the cage. Insert the desired common padlock or security seal. To unlock and loosen, remove the padlock or security seal and flick the head of the slide outward with your thumb.
Recommended Load on the Lock: ≤ 75lbs.
Cord Size: = 3/16", based on braided cotton cord currently used by the USPS.
B-LOK®-1B P/N 303-0010-1012 (Black) (packed 2500 per carton)
They are stocked in soft elastomeric material in opaque black (but can be special-ordered in many opaque or see-thru colors. Recommended for the dual ends of a drawstring on hats, caps, parkas or other wearing apparel near or about one's face. Now locks stronger yet unlocks easier! To install, orient the lock so that the bridged end of the slit is facing you as in Image a. squeeze the 'ears' inward to open the slit as in Image b. to thread the cords thru. Slide the lock to the desired location and release the ears to lock. Firmly tie off the loose ends of the cords. (To unlock, gently squeeze the ears again and slide the lock away from the load.) Recommended Load on the Lock ≤ 5Lbs. 1/16" ≤ Cord Size ≤ 1/8", based on the recommended soft flexible braided tipped cords.