what is diameter of the pin?

Diameter of the pin is approx. 9/32 inch.. It is larger than 1/4 inch

can I get three of them keyed alike?

Hi,Unfortunately these locks are all keyed differently, but they can be rekeyed by a locksmith that has the Master wafer lock rekeying kit.Thank you,NLS Products

What is shank diameter?

The pin diameter is 1/4". Thank you, NLS Products.

Does it fit in a 1/4 inch hole my coupler will only fit 1/4 inch bolt size

This product has a 1/4" diameter pin to secure the coupler. It can be used on latches spanning up to 2-3/4" wide

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🔐 Lock in peace of mind with Master Lock’s sleek, weatherproof trailer security!

WEATHERPROOF DEFENSE - Innovative water-tight cap protects the keyway from dirt and moisture, extending lock life and performance.
COMPACT LIGHTWEIGHT - Slim, durable design at just 113 grams fits seamlessly without adding bulk or weight.
RUSTPROOF RELIABILITY - Premium stainless steel construction resists corrosion, keeping your lock looking sharp and functioning flawlessly.
TAILORED SECURITY FIT - Six adjustable locking positions ensure a perfect, secure fit for any trailer or RV hitch.
KEYED ALIKE CONVENIENCE - Rekeyable cylinder lets you use one key for multiple locks—streamline your security with ease.

The Master Lock 2847DAT Stainless Steel Adjustable Coupler Lock offers versatile, corrosion-resistant security for trailers and RVs. Featuring six locking positions adjustable from 9/16 to 2-3/4 inches, a water-tight cap to protect against dirt and moisture, and a rekeyable cylinder for keyed-alike convenience, this slim, lightweight lock ensures durable, hassle-free protection wherever you go.

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Manufacturer	MASTER LOCK COMPANY LLC
Brand	Master Lock
Model	MASTERLOCK
Product Dimensions	17.27 x 10.16 x 2.54 cm; 113.4 g
Item model number	2847DAT
Manufacturer part number	2847DAT
OEM Part Number	2847DAT
Special Features	durable, slim fit
Item Weight	113 g

Master LockTrailer Lock, Stainless Steel Adjustable Coupler Latch Lock, 2847DAT

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