ASME B18.2.1
Square and Hex Bolts and Screws – Inch Series
1/4 in to 4 in
UNC & UNF
Grade 2 / Grade 5 / Grade 8 / A193 B7 / A307 A / A354 BD
Hex Head
Grade 2 Alloy / Stainless Steel
India
ASME
Salt-spray tested to relevant grade
Per property class / grade
Dry, corrosion-inhibited packing
| Size (in) | s (in) | k (in) | TPI UNC | L Range (in) |
|---|---|---|---|---|
| 1/4″ | 7/16 | 11/64 | 20 | 1/2–6 |
| 5/16″ | 1/2 | 13/64 | 18 | 1/2–6 |
| 3/8″ | 9/16 | 1/4 | 16 | 3/4–8 |
| 7/16″ | 5/8 | 19/64 | 14 | 3/4–8 |
| 1/2″ | 3/4 | 21/64 | 13 | 3/4–10 |
| 5/8″ | 15/16 | 27/64 | 11 | 1–10 |
| 3/4″ | 1-1/8 | 1/2 | 10 | 1–12 |
| 1″ | 1-1/2 | 41/64 | 8 | 1-1/4–12 |
| 1-1/4″ | 1-7/8 | 25/32 | 7 | 1-1/2–12 |
| 1-1/2″ | 2-1/4 | 15/16 | 6 | 2–12 |
Nominal thread diameter across the external thread major diameter.
Width across flats for wrench engagement on hex head.
Head height from bearing surface to top face.
Overall fastener length from bearing surface to end.
Every batch of ASME B18.2.1 Square and Hex Bolts and Screws – Inch Series is manufactured under an ISO 9001:2015 certified quality management system with full in-process control.
A mill test report covering chemical composition, tensile, hardness and dimensional inspection accompanies every ASME B18.2.1 Square and Hex Bolts and Screws – Inch Series shipment.
Commonly stocked ASME B18.2.1 Square and Hex Bolts and Screws – Inch Series sizes leave our warehouse within 48 hours of order confirmation, minimising your downtime.
Established freight and customs partners ensure reliable delivery of ASME B18.2.1 Square and Hex Bolts and Screws – Inch Series to buyers in over 50 countries worldwide.
Non-standard ASME B18.2.1 Square and Hex Bolts and Screws – Inch Series lengths, diameters and special thread pitches are produced to order to match your drawing requirements.
Direct-from-factory pricing on ASME B18.2.1 Square and Hex Bolts and Screws – Inch Series with no middleman markup, offering the best value on volume and repeat orders.
Hardness, tensile strength and dimensional checks for ASME B18.2.1 Square and Hex Bolts and Screws – Inch Series are performed in our in-house laboratory before every release.
Combine ASME B18.2.1 Square and Hex Bolts and Screws – Inch Series with other standard-specification fasteners into a single container shipment to reduce freight costs.
Our specialist team prepares all customs, compliance and shipping paperwork for every ASME B18.2.1 Square and Hex Bolts and Screws – Inch Series export order.
