Product Description
3/8″-16 UNC Grade 8 Zinc Plated Countersunk Socket Bolts – Part Threaded
3/8″-16 UNC Grade 8 high tensile steel countersunk socket bolts with a zinc plated finish. These part-threaded bolts feature a plain shank and a flat countersunk head for flush seating in a matching 82° countersink.
Supplied in 2 1/2″ overall length, with an internal hexagon socket accepting a 7/32″ Allen key. Suitable for compatible machinery, equipment assembly, repairs and maintenance.
Specifications
| Thread size | 3/8″-16 UNC |
|---|---|
| Nominal thread diameter | 3/8″ / 9.525mm |
| Threads per inch | 16 TPI |
| Thread series | Unified National Coarse, right-hand |
| Material | High tensile steel |
| Grade | Grade 8 |
| Finish | Zinc plated |
| Head style | Flat countersunk socket head |
| Head angle | 82° included angle |
| Drive size | 7/32″ hexagon socket / Allen key |
| Thread coverage | Part threaded with a plain shank |
| Overall length | 2 1/2″ / 63.5mm, including the countersunk head |
Available Size
- 3/8″-16 UNC × 2 1/2″ – part threaded
Key Features
- Grade 8 high tensile steel construction.
- Zinc plated finish provides corrosion protection.
- Part-threaded design incorporates a plain shank.
- 82° countersunk head for flush seating in a matching countersink.
- Internal hexagon drive accepts a 7/32″ Allen key.
Selection and Installation
Check that the mating thread is 3/8″-16 UNC. These bolts are not interchangeable with 3/8″-24 UNF or metric threads.
Measure the required length including the countersunk head. Check that the plain shank and threaded portion suit the joint thickness and provide sufficient thread engagement. Exact shank and thread lengths are not specified.
Use a matching 82° countersink, seat the correct Allen key fully and tighten to a torque appropriate to the joint and mating material.
Pack Sizes
Available in quantities of 1, 5, 10, 20, 50 or 100 bolts. Select the required pack size before ordering.
Standards
- ASME B18.3 – dimensional reference for imperial countersunk socket screws.
- ASME B1.1 – Unified inch screw threads.
