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ABUS SR30 vs SR40

Updated: October 2026

The white SR30 is about £20 and hides its screws. The SR40 is a 40 mm brass bolt at about £3.99. ABUS SR30 vs SR40 is not two versions of one lock. They share a brand and a slide, then they split. The 60 mm nickel bolt is a one-line mention, not a third column. Live prices are on the [ABUS door bolt comparison](/hub/door-and-window-security/abus-door-bolt). Who each pick is for is on the [best ABUS door bolt](/hub/door-and-window-security/abus-door-bolt/sub/abus-door-bolt-best) page. Peter F. used the two listings and ABUS's SR30 page, updated 19 October 2026. This is not a lab test. A qualifying purchase can earn a commission at no extra cost to you.

The white SR30 is about £20 and hides its screws. The SR40 is a 40 mm brass bolt at about £3.99. ABUS SR30 vs SR40 is not two versions of one lock. They share a brand and a slide, then they split.

Our top picks

ABUS ABUS SR30 slide bolt, white

Best overall

ABUS ABUS SR30 slide bolt, white
9.2/10about £20.13
View offer
ABUS ABUS SR40 brass door bolt, 40 mm

Best value

ABUS ABUS SR40 brass door bolt, 40 mm
8.2/10about £3.99
View offer
On this page
  1. 1.The two products
  2. 2.When the SR30 is the one
  3. 3.When the SR40 is the one
  4. 4.What the extra money does not buy

The two products

The SR30 here is model 11777, white, at about £20.13, and 4.6 from 1,417 reviews with UK notes in that record. The lock type is keyless. A feature tag says key unlock, which is not a key in the box. Screws and spacer plates are included, and the cover hides the screws. ABUS calls the level home security 3, not VdS, and does not state the alloy of the bar. The SR40 M, model 03593, is about £3.99: brass, a round end, 40 mm, about 40 g. It is 4.1 from 213 ratings, sampled mostly from France, Spain, Italy and Germany. No security level, no spacer plates, and no outdoor answer. One pack arrived open without screws. The gap is about £16, from an open privacy bolt to a covered one. It is not a step up to BS 3621. Flush faces are on the buying guide.

When the SR30 is the one

Choose the SR30 when you want an extra night bolt on a small mount: a narrow stile, the handle side of a French door, or a timber door where an open barrel bolt would look crude. The cover hides the screws. The plates take a small depth step, tried one at a time with the door closed. They do not cure a proud frame. UK notes call it useful where a uPVC handle is hard to push down. Caps are stiff, and screws can be long. Level 3 is ABUS's scale, not a police approval. It does not answer BS 3621 or a TS007 cylinder, and it does not lock the door while you are out. Skip it when the cover is wasted on a cupboard catch, or when someone shut in cannot slide a bolt. Those caps are on the how to fit page.
ABUS ABUS SR30 slide bolt, white

Testsieger

ABUS ABUS SR30 slide bolt, white
9.2/10about £20.13
View offer

When the SR40 is the one

Choose the SR40 when the door is internal, the faces are level, and 40 mm reaches the keep. The reviews describe bathroom privacy, cupboards, a baby gate and a motorhome. The profile is low. At about £3.99 you can send it back if 40 mm is shorter than the photograph. Two screw lengths arrive, screws strip, and a pack has arrived without them. The finger pull has unwound, and a hard pull slid the bolt open. There is no cover and no spacer plate. Do not treat 4.1 from 213 as the same evidence as 4.6 from 1,417. If the frame sticks out, buy neither.

What the extra money does not buy

Buy the SR30 for a covered night bolt on a nearly flush door, at about £20. Buy the SR40 for privacy on a flush door, after you check the screws and the real length. The extra does not buy a key or a BS 3621 mortice. If the cover, the plates and the reversible handing change nothing on your door, the extra is optional. Either bolt can sit beside a lock you already trust. Neither stands in for it when you go out.

Common questions

What do I get for the extra £16?
You get the SR30's cover, the spacer plates, a stated reversible handing, ABUS's own level 3, and 1,417 reviews rather than a 40 mm brass bolt whose sampled texts are mostly not British. You do not get a key, a VdS certificate, or a lock that meets BS 3621. If none of the SR30's parts changes your door, the extra is optional.
Is the SR30 metal or plastic?
The amazon.co.uk material field says plastic, and that matches the cover you see. ABUS does not, on the pages used here, state the alloy of the sliding bar, so this comparison will not invent one. The SR40's title says brass. Its technical block has no separate material row.
Are the star ratings comparable?
Only as amazon.co.uk averages, not as matching evidence. The SR30 is 4.6 from 1,417 reviews with UK fitting comments. The SR40 is 4.1 from 213 ratings whose sampled texts are mostly from France, Spain, Italy and Germany. A lower star on the brass bolt is not, by itself, proof it is worse at privacy. It is a thinner and less local record.
Can both be used if the frame sticks out?
No. Both are straight bolts. The SR30 spacer plates take a small depth step, tested with the door closed, not a proud frame. The SR40 review note is that the faces need to be on one level. A cranked bolt is a different product. Forcing either keep onto an offset stop is why the bar will not shoot.
Does either replace a mortice lock?
No. A mortice lock sits in the edge of the door and, where BS 3621 applies, is worked by a key from both sides. These are surface bolts operated from the knob side. They can sit alongside a lock you already trust. They do not stand in for it when you go out, and they do not satisfy a policy that names that standard.

Related pages

Door bolt

ABUS door bolt

Best ABUS door bolt: a compact extra or small spend

ABUS door bolt buying guide: length and flush faces

How to fit an ABUS door bolt without splitting timber

How an ABUS door bolt fits on a uPVC or patio door

Sources

Public UK and manufacturer sources from the research digest, used for this page in October 2026. Prices, stars and review counts are the amazon.co.uk figures in this comparison. ABUS security level 3 is not treated as a British Standard.

  1. ABUS SR30 page (retrieved 19 October 2026)
  2. ABUS SR30 datasheet (retrieved 19 October 2026)
  3. Police.uk: door and window locks (retrieved 19 October 2026)
  4. West Yorkshire Police: door and window advice (retrieved 19 October 2026)
  5. BSI: BS 3621 scope (retrieved 19 October 2026)
  6. Master Locksmiths Association: minimum security, January 2025 (retrieved 19 October 2026)
  7. Secured by Design: locks and associated hardware (retrieved 19 October 2026)
  8. Suffolk Latch Company: choosing a door bolt (retrieved 19 October 2026)