Archery/bow accessory set screws (generic component, not confirmed as sight-specific) screw size
M4 · 8 mm long
The screws used on Archery/bow accessory set screws (generic component, not confirmed as sight-specific) are M4, 8 mm long.
The record covers bogensportshop sells a 'BSS Set Screw M4 x 8 mm Stainless Steel' listed under archery components/screws-nuts category, though not tied to a specific named sight product.
Head and drive, as the source states them: set screw (headless) head.
This entry is marked reported and comes from bogensportshop.eu.
An M4 screw is 4 mm in diameter with a 0.7 mm pitch, tapped with a 3.3 mm drill; imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same.
Archery/bow accessory set screws (generic component, not confirmed as sight-specific) screw specifications
One row per fitment record. Head, drive are shown only where the source states them; pitch is the ISO coarse pitch for the thread.
| Thread | Length | Pitch | Head | Drive | Where it goes | Status |
|---|---|---|---|---|---|---|
| M4 | 8 mm | 0.7 mm | Set screw (headless) | not stated | Bogensportshop sells a 'BSS Set Screw M4 x 8 mm Stainless Steel' listed under archery components/screws-nuts category, though not tied to a specific named sight productstainless | Reported |
Fitment records and sources
Bogensportshop sells a 'BSS Set Screw M4 x 8 mm Stainless Steel' listed under archery components/screws-nuts category, though not tied to a specific named sight product
pitch 0.7 mm · tap 3.3 mm · clearance 4.5 mm · PH2 / Torx T20
How to check the screw before you buy
- Scope and accessory mounts often publish a torque value; tighten to it in a cross pattern.
- Diameter: across the threads an M4 screw measures about 4 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
- Pitch: 0.7 mm from one thread crest to the next (14.29 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
- Length: for set screw (headless) screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
- The record states 8 mm. Going longer risks bottoming out or touching parts behind the hole; going shorter loses thread engagement.
- Driver: the source does not name the drive. Standard M4 heads take PH2 for Phillips and T20 for Torx, and a 3 mm hex key for socket heads; a bit that fits loosely will cam out and strip the head.
- Tightening: no device-specific torque is published in these records. The site's general figure for M4 is about 2.0-3.0 N·m into metal threads and 0.8-1.4 N·m into plastic bosses; snug it up and stop.
Common mix-ups with M4
- Camera rig/cage accessories (SmallRig, Wooden Camera/Metabones) frequently mix M4 structural screws with 1/4-20 and 3/8-16 imperial mounting points on the same product — verify which specific fastener a manual is referencing before ordering replacements.
- Some rackmount KVM switch kits pair M4x10 bracket-to-rack screws with M3.2x4.5 bracket-to-chassis screws (non-standard M3.2, not a true M3), so kits are not fully interchangeable with generic M3/M4 hardware.
More in Sports, Outdoors & Optics Mounts
The same screw also fits
Devices whose records share a thread with Archery/bow accessory set screws (generic component, not confirmed as sight-specific), closest length match first.
- Heart rate chest strap buckle also M4 × 8 mm
- Fishing reel side plates also M4 × 8 mm
- Tommy Car Wash Tunnel Controller (TPA3140.6) control cabinet terminal wiring also M4 × 8 mm
- LG 55LM6400 also M4 × 8 mm
- Dell UltraSharp U2725QE monitor also M4 × 8 mm
- cab Applicator A3200 print-and-apply labeling system (packaging line hardware) also M4 × 8 mm
- Allen & Heath ZED mixer rack ear kit AP7956 also M4 × 8 mm
- goBILDA metric building system also M4 × 8 mm
Questions about Archery/bow accessory set screws (generic component, not confirmed as sight-specific) screws
- What size screw does Archery/bow accessory set screws (generic component, not confirmed as sight-specific) use?
- M4 × 8 mm for bogensportshop sells a 'BSS Set Screw M4 x 8 mm Stainless Steel' listed under archery components/screws-nuts category, though not tied to a specific named sight product.
- How long are the screws in Archery/bow accessory set screws (generic component, not confirmed as sight-specific)?
- The record gives 8 mm. Measure the original from under the head (overall for a countersunk head) to confirm before ordering.
- What is the thread pitch of an M4 screw?
- 0.7 mm (coarse), which is the standard pitch for M4 machine screws; a 0.5 mm fine pitch exists but is uncommon. The tap drill is 3.3 mm and the normal clearance hole is 4.5 mm.
- What screwdriver do I need for Archery/bow accessory set screws (generic component, not confirmed as sight-specific)?
- The sources do not name the drive. For M4, Phillips heads normally take PH2 and Torx heads T20; socket heads take a 3 mm hex key.
- Can I use an imperial screw instead of M4?
- No. Imperial look-alike: #8-32 (4.17 mm) — the standard US PC/rack screw, close but not the same. Use a true M4 screw so it does not cross-thread or strip the hole.