Imperial Fasteners
We Stock Imperial Inch Sizes for Bolts, Nuts & Washers.
From Quarter Inch to 2 Inch.
The Home of Imperial Fasteners
We hold a full range of inch fasteners including British Standard range, BSW, BSF, UNC & UNF in sizes ranging from 1/4" to 2". Available in a wide range of finishes and processes, our machining shop can modify and manufacture imperial fasteners with a wide range of processes.
Imperial Fasteners to Metric Size Conversion
Here's a handy chart when comparing imperial size fasteners in inches with metric sizes in millimetres
| 1/8" | 3/16" | 1/4" | 5/16" | 3/8" | 7/16" | 1/2" | 9/16" | 5/8" | 11/16" | 3/4" | 13/16" | 7/8" | 15/16" | 1 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.59mm | 3.18mm | 4.76mm | 6.35mm | 7.94mm | 9.53mm | 11.11mm | 12.70mm | 14.92mm | 15.88mm | 17.46mm | 19.05mm | 20.64mm | 22.23mm | 23.81mm | 25.40mm |
Imperial Nuts
Imperial Full Nuts
Imperial Hexagon Full Nuts UNC, UNF, BSW, & BSF.
Imperial Half/Lock Nuts
Imperial Half Nuts, BSW, BSF, UNC, UNF Lock Nuts.
Imperial Nyloc Nuts
SW, BSF, UNC, UNF. Secure, vibration-resistant.
Imperial Castle Nuts
Castle & Slotted Nuts Imperial Sizes SW, BSF, UNC, UNF
Imperial Flange Nuts
For increased surface grip and stability.
Imperial Left Hand Nuts
Imperial Left Hand Nuts, BSW, BSF, UNC/UNF Left Hand Lock Nuts
Imperial Grade 10/12 Full Nuts
Hardened for automotive, structural, high temperature.
Imperial Grade 10 Nylon Nuts
Secure, vibration-resistant inch nylon nuts
Imperial Stainless Nuts
For high corrosion resistance. Full range of types available.
Imperial Vee Lock Nuts
AKA Imperial Stover Nuts, Internal Flange & Serrated Bottom.
Imperial Weld Nuts
Designed Specifically for Welding Applications.
Imperial Brass Nuts
Great for high temperature applications.
Imperial Bolts
Imperial HT Bolt Sets
As a set, High-tensile strength for demanding load-bearing.
Imperial HT Bolts
High-tensile strength for demanding load-bearing.
Imperial Flange Sets
Flange head for even distribution & reduced slippage.
Imperial Socket CSK
Low-profile, flush fit with Allen-wrench engagement.
Imperial Socket Buttons
Rounded head, deep socket for reliable fastening.
Imperial Socket Caps
Designed for flush, secure, and clean installations.
Imperial Cup Sq Bolts
Secure fastening with a square neck for anti-rotation.
Imperial Socket Sets
For precise fastening in varied applications.
Imperial UNC/UNF Bolt Sets
Unified thread standards ensuring precise and robust fit. As a set
Imperial UNC/UNF Bolts
Unified thread standards ensuring precise and robust fit .
Imperial Cotter Pins
Secure mechanical components and prevent loosening.
Imperial Hex Keys
Tool for engaging imperial hexagonal socket fasteners.
Imperial Machine Screws
Precision thread for consistent metal-metal fastening.
Imperial U Bolts
U-shaped for securing pipes, conduits, or anchoring.
Imperial Self Tappers
Sharp, self-drilling screws metal or wood penetration.
Imperial Engineer Studs
Double-ended thread fasteners for assemblies.
Imperial Flange Bolts
Flange head for even distribution & reduced slippage.
Imperial Wood Screws
Tapered, sharp thread for reliable wood-wood fastenings.
Imperial Studding
Threaded bar rod for versatile fastening & extension.
Imperial Washers
Imperial Rect Spring Washer
Rectangular section, split design for consistent tension.
Imperial SQ Spring
Square section for optimal tension and fit.
Imperial BS3410 Table 3 Light
Compliant with tolerances for lightweight applications.
Imperial BS3410 Table 3 Heavy
Diagonal for precise alignment & angular seating.
Imperial BS3410 Table 1 Small
Specific tolerances for compact applications.
Imperial F436 Washers
Hardened flat washers for structural steel bolting.
Imperial BS3410 Table 4 Light
Precision-crafted, set tolerances for lighter applications.
Imperial BS3410 Table 4 Heavy
Tailored for high-stress; meeting stringent tolerances.
Imperial BS3410 Table 2 Large
Specific tolerances for compact applications.
Imperial ASA B27.1 1965 HVY
Washers conforming to American Standards Association.
Imperial Double Coil Rect Spring
Specific tolerances for compact applications.
Imperial ASA B27.1 1965 REG
Cut and deformed to prevent loosening of the assembly.
Imperial Repair Washers
Fixing and restoring strength to damaged areas.
Imperial BS3410 Table 6
Washers designed for specialized applications with set tolerances.
Imperial BS3410 Table 5
Engineered to meet standards for heavy-duty applications.
Imperial Phosphor Bronze
Corrosion-resistant, high-strength washers.
Imperial Thru Hard Washers
Heat-treated, hardened for durable & reliable fastening.
Imperial BS3410 Table 7
For specific requirements & specialized applications.
Imperial Stainless Washers
Corrosion-resistant, durable and long-lasting fastening.
Imperial Brass Washer
Corrosion-resistant, conductive & decorative use. DIN 125.
A full range of coatings and finishes.
| Standard Finish | Special Electroplating | High Corrosion Resistance | Automotive & Petrochemical | Other Finishes |
|---|---|---|---|---|
| Self Colour-Plain | COLBOLT | HOT DIP GALVANISED | DACROMET | CHEMICAL BLACK |
| Bright ZINC & CLEAR CR3 | TIN | SHERARDIZED | XYLAN | BLACK JAPAN |
| Bright ZINC & YELLOW | NICKEL | RILSAN | JS | |
| Bright ZINC & BLACK | BRASS | SHERAPLEX | DELTA TONE | |
| BRIGHT ZINC & DE-EMBRITTLE | DELTA PROTECT | |||
| MECHANICAL ZINC | PTFE |
Our Machining Processes
