Product Description
270-Piece 1/4" UNF A2 Stainless Steel Hex Head Set Screw, Nut & Washer Assortment
A 270-piece assortment of 1/4" UNF A2 stainless steel fully threaded hexagon head set screws, nuts and washers. Includes five screw lengths, full nuts, Nyloc nuts, flat washers, spring washers and two sizes of penny repair washer.
Keep matching imperial fasteners organised for repairs, restoration and workshop assembly work. Choose the complete boxed set for convenient storage or the refill pack to replenish an existing assortment box.
Specifications
- Total Contents: 270 pieces
- Material: A2 stainless steel fasteners, with nylon inserts in the Nyloc nuts
- Thread Size: 1/4"-28 UNF
- Thread Type: Unified National Fine, right hand
- Threads Per Inch: 28 TPI
- Set Screw Head: Hexagon
- Set Screw Thread Coverage: Fully threaded
- Set Screw Spanner Size: 7/16"
- Set Screw Lengths: 1/2", 5/8", 3/4", 1" and 1 1/4"
- Penny Washer Sizes: M6 × 25mm and M6 × 35mm outside diameter
Assortment Contents
| Component | Size | Quantity |
|---|---|---|
| Fully Threaded Hex Head Set Screws | 1/4" UNF × 1/2" | 10 |
| Fully Threaded Hex Head Set Screws | 1/4" UNF × 5/8" | 10 |
| Fully Threaded Hex Head Set Screws | 1/4" UNF × 3/4" | 10 |
| Fully Threaded Hex Head Set Screws | 1/4" UNF × 1" | 10 |
| Fully Threaded Hex Head Set Screws | 1/4" UNF × 1 1/4" | 10 |
| Hexagon Full Nuts | 1/4" UNF | 30 |
| Nyloc Nuts | 1/4" UNF | 30 |
| Flat Washers | 1/4" | 60 |
| Spring Washers | 1/4" | 60 |
| Penny Repair Washers | M6 × 25mm outside diameter | 20 |
| Penny Repair Washers | M6 × 35mm outside diameter | 20 |
| Total Pieces | 270 | |
Complete Set or Refill Pack
- Complete Set: Supplied in a plastic storage box with dividers and a clip-down lid.
- Refill Pack: Supplied in individual plastic bags, without the storage box.
Measuring and Fitting
Set screw lengths are measured from beneath the hexagon head to the end of the screw. Match the 1/4"-28 UNF thread to the nut or tapped hole and select a length that provides sufficient thread engagement.
Start threaded components by hand and tighten with a correctly fitting spanner or socket. When using a Nyloc nut, ensure the screw passes through the nylon locking insert.
The penny washers provide a wider bearing surface than standard flat washers, helping spread the clamping load over a larger area.
Related Products
Browse our nuts, washers and tools and accessories. For help identifying imperial threads, see our thread data guide.
