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UNION 3K75 C Series 5 Lever Sashlocks


  • The Union 3K75 series 5 Lever Mortice roller bolt sashlocks are suitable for use on timber doors hinged on the left or right and are also suitable for use on doors up to 50mm thick.
  • The lock has a deadbolt operation and is locked or unlocked by key from either side with the latch bolt being withdrawn by a lever handle from either side.
  • It has force resistant, anti-pick and anti-saw security features and is available with square forend and striking plate with a 14mm bolt throw.
  • They are also pierced to accept bolt through furniture.
  • The 3K74E series locks are recommended for use on a front door in conjunction with a BS standard night latch.
  • They are also covered by a 25 Year guarantee.
  • EN1634-1 assessed for use on 60 minute timber fire doors.
  • Visi packed.  


  • Deadbolt: Brass, with hardened steel rollers.
  • Latch Bolt: Roller bolt (non handed).
  • Follower: Sintered Iron, 8mm square.
  • Keys supplied: Standard differ supplied with 2 keys.
  • For locks to pass please specify number of keys required.
  • Key Blank Number: B-K722 (standard).
  • Cut Key Number: B-5LC.
  • Not suitable for master keying.
  • Rebate Kit B-3K74R (13mm, 19mm and 25mm).

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Delivery Information

Free delivery on all online orders over £54.99, delivered to the UK mainland only; A small order charge of £6.95 vat is charged on all orders under £54.99 (net). 

Many of our items are available for next day delivery, where items are made to order or not currently in stock delivery times will vary. Please contact us for a confirmed delivery date or alternatively a representative will confirm your order. 

Special delivery services are available; please contact our Sales Office to discuss your specific requirements. 

The following postcodes will be subject to a delivery surcharge: 

AB37 & AB38, AB41-AB56, FK19-FK21, IV1-IV40, IV52-IV54, IV63, JE1-JE5, KW1-KW14, PA21-PA40, PH15-PH41, PH49, PH50, HS, IV41-IV51, IV55 & IV56, KA27, KA28, PA20, PA41-PA78, PH42-PH44 and ZE, This also includes Northern Ireland. Certain products within our range are subject to a delivery surcharge when delivered to additional areas in Scotland than those already listed.

A customer service representive, will contact you upon receipt of your order to advise of the relevant charges or please call us to confirm the surcharge prior to placing your order

If you would prefer to collect your delivery from our warehouse, please select collection at the checkout and we will let you know when your order is ready to collect.

Contact Us for Bulk Discounts

Part Number Description Price
ID 171474
3K75 C Seriec 5 Lever Sashlock 67mm Brass

(£50.67) RRP (Ex VAT)

£38.00 (Ex VAT)

£45.60 (Inc VAT)

ID 171475
3K75 C Seriec 5 Lever Sashlock 80mm Brass

(£50.67) RRP (Ex VAT)

£38.00 (Ex VAT)

£45.60 (Inc VAT)

ID 171476
3K75 C Seriec 5 Lever Sashlock 67mm Satin Chrome

(£51.68) RRP (Ex VAT)

£38.76 (Ex VAT)

£46.51 (Inc VAT)

Estimated delivery is for guidance only, an exact delivery date will be confirmed on your order acknowledgement. Please contact us for further information.We make every effort to ensure that the information provided on this page is accurate, we can not be held responsible for any errors, typography or otherwise. Illustrations and images are representational of typical styles and designs may vary. Prices and specifications may alter without prior notice.

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*Online orders over £39.99 (net) delivered to UK Mainland only. Excluding certain postcodes

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