Smith & Wesson Model 686 L Frame Hammer Block .357 Magnum, Part# 68612
$4.99
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Smith & Wesson Model 686 L Frame Hammer Block .357 Magnum, Part# 68612
$4.99
Smith & Wesson Model 686 Hammer Block – Part# 68612
This is a genuine factory Smith & Wesson hammer block for the L Frame Model 686 revolver. An old-style used part in serviceable condition. The hammer block is a critical passive safety component — it prevents the hammer from contacting the firing pin unless the trigger is fully depressed, protecting against accidental discharge from drops or impacts.
If your revolver has a worn, cracked, or missing hammer block, replace it immediately before returning the firearm to service.
Part Details
- Part Number: 68612
- Part Name: Hammer Block
- Material: Stainless Steel
- Condition: Used, factory original (old style)
- Frame: L Frame
- Function: Passive drop safety — blocks hammer-to-firing-pin contact unless trigger is pulled
Model Compatibility
| Model | Caliber | Frame | Compatible |
|---|---|---|---|
| Model 686 | .357 Magnum / .38 Special | L Frame | ✅ Yes |
| Model 686 Plus | .357 Magnum | L Frame | ⚠️ Verify fitment |
| Model 581 | .357 Magnum | L Frame | ⚠️ Verify fitment |
| Model 586 | .357 Magnum | L Frame | ⚠️ Verify fitment |
| Model 681 | .357 Magnum | L Frame | ⚠️ Verify fitment |
| Model 19 / 66 | .357 Magnum | K Frame | ❌ Different frame |
| Model 27 / 28 | .357 Magnum | N Frame | ❌ Different frame |
Note: Hammer blocks are frame-specific and not interchangeable between J, K, L, or N Frame revolvers. Always confirm your exact model before ordering. Model numbers are stamped on the frame behind the yoke when the cylinder is swung out. Pre-1957 revolvers may not have a model number — contact us with your serial number for assistance.
Installation
Hammer block replacement requires full disassembly of the lock work. This is an armorer-level task — we strongly recommend installation by a qualified gunsmith, as improper installation of a safety component can result in an unsafe firearm.
Questions about fitment? Call or email us — we're happy to help.