Fgruh M2/M3/M4/M5 Hex Socket Button Head Bolt Assortment Kit (2200 Pcs)
Overview
An assortment box of hex socket button head bolts in M2/M3/M4/M5, plus matching hex nuts and washers for each size. 10.9-grade alloy steel. Pairs with the Kadrick threaded insert kit also in this library — inserts give plastic parts a durable metal thread, these are the screws (and nuts/washers, for through-hole mounting) that drive into them or into standard tapped holes.
Key specs
- Material/grade: 10.9-grade alloy steel (per box copy)
- Bolt head style: hex socket button head (rounded dome head, hex/Allen drive)
- Bolt sizes and counts:
| Size | Qty | Size | Qty |
|---|---|---|---|
| M2×4 | 45 | M5×8 | 20 |
| M2×8 | 45 | M5×12 | 20 |
| M2×12 | 45 | M5×16 | 20 |
| M2×16 | 45 | M5×20 | 20 |
| M4×8 | 34 | M3×6 | 40 |
| M4×12 | 32 | M3×8 | 40 |
| M4×16 | 32 | M3×12 | 40 |
| M4×20 | 32 | M3×16 | 40 |
- Nuts and washers (per size, hex nut + flat washer):
| Size | Nut qty | Washer qty |
|---|---|---|
| M2 | 180 | 180 |
| M3 | 160 | 160 |
| M4 | 130 | 130 |
| M5 | 80 | 80 |
- Drive type: hex socket (Allen key), standard metric sizes per bolt diameter
- Not suitable for children under 3 (small-parts warning, per box)
Pinout
N/A — passive mechanical hardware, not an electronic component.
Wiring / typical usage
Standard machine screw use: through-hole mounting with a nut and washer on the back side, or threaded directly into a tapped hole / heat-set insert (see the Kadrick kit) for a blind mount. Button head style sits low-profile and rounded rather than flush (unlike a countersunk/flat head) — pick a different bolt style if a flush surface is needed. 10.9 grade is a mid-high strength alloy steel rating, well beyond what’s needed for lightweight electronics enclosures but useful if any build also involves structural/mechanical mounting (e.g. motor brackets).
Code / libraries
N/A — passive hardware.
Source material
- Full spec table (sizes, counts, grade) read directly from the box’s own printed label — high confidence, no external source needed.
- ASIN cross-reference: Fgruh Hex Socket Button Head Bolts Assortment Kits — Amazon storefront
- Product photo:
/inventory/fgruh-hex-bolt-assortment-kit/product-photo.jpg— the as-supplied photo of the box’s own label doubles as a clean product photo (well-lit, in focus, full spec table and ASIN barcode legible); no separate manufacturer photo needed.
Verification
Read directly from the box's own printed label (photo-verified), including the exact ASIN from the barcode — high confidence.
Notes / gotchas
- Hex socket (Allen) drive, not Phillips/flathead — make sure the right size hex key is on hand before assuming a screwdriver will work.
- Nut/washer counts are per-size, not per-bolt-length — e.g. all four M2 bolt lengths (180 pcs total) share the same 180 M2 nuts and 180 M2 washers, not 180 each per length.