To place an order, scroll down and enter quantities in the multi-add grid and add all items to your cart. For product details, select any SKU or size and click the Description and Specifications tabs. Scroll to the bottom for related items.
SEMS Machine Screws, Phillips Pan Head w/ Internal Lock Washer, Zinc Plated Steel, #4-40 x 7/16"
Machine Screws with Pre-Assembled Internal Tooth Lock Washers
| Quantity | Unit price |
|---|---|
| 1 – 99 |
$0.13*
|
| 100 – 999 |
$0.07*
|
| 1000+ |
$0.06*
|
- asme: B 1.1
- Class: 2A
- Color: Blue/Silver
- Diameter: #4
- Drive Style: Phillips
- Elongation: 30%
- Head Type: Pan Head
- Thread Direction: Right Hand
- Thread Type: Coarse
- Finish: Zinc Plated
- Fit: 2A
- Grade: Screw
- Hardness: Screw
- Head Height: Max 0.080 - Min 0.070
- Head Diameter: Max 0.219 - Min 0.205
- Head Style: Pan
- Length: 7/16"
- Material: Steel
- Phillips Drive: #1
- Product Type: SEMS Machine Screw
- Standards Met: ASME B1.1, ASME B18.13, ASME B18.6.3
- System of Measurement: Inch
- Thread Diameter Major: #4 (Max 0.112 - Min 0.1061)
- Thread Diameter Minor: #4 (Max 0.095 - Min 0.0925)
- Thread Direction: Right Hand
- Thread Pitch: 40 Per Inch
- Thread Size: #4-40
- Thread Standard: UNC
- Thread Type: Coarse
- Tolerance (IFI): Actual measurements may vary slightly +/- depending on production run within IFI Tolerances
- Washer OD: (Max 0.268 - Max 0.258)
- Washer Thickness: (Max 0.018 - Min 0.012)
- Yield PSI: 55,000 - 75,000 PSI
- Machine screws with pre-assembled lock washers
- Features a free-spinning internal tooth lock washer beneath the head
- Internal tooth lock washer provides a clean, finished look and prevents snags
- Single part design saves time and hassle
- Excellent solution for bulk projects of production lines
- Zinc plated steel
#4-40 Phillips Pan Head SEMS with Internal Tooth Lock Washers are essentially a pre-assembled machine screws with lock washers (similar to a Keps Nut). The lock washer is beneath the head of the screw and is free-spinning. This pre-assembly saves time and hassle on production lines and in any application where a machine screw with lock washer may be necessary, since they do not need to be put together, and there is no need to worry about losing a screw or washer. Internal tooth lock washers are often used over external for their finished edge that hides the locking teeth for a finished look, or snag prevention for close parts. Because of the integrated lock washer, SEMS screws are often referred to as lock screws, or locking screws.
Frequently Used With
