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    Flathead Threaded Insert - Open End Keyed - Unified
    Flathead
        
    
    
            
                
                    
                        
                
            
                
            
        
    - Designed for high load applications. Available with rib, key or full hex features for high torque applications.
- Both UNC and UNF threads available in No. 10 and larger thread sizes. Check for availability of other grip ranges and designs.
| Part # | Thread Size | Grip Range | A ± .015 | M Ref. | Fastening | Standard Material | Standard Finish | CAD | 
|---|---|---|---|---|---|---|---|---|
| AEA37K455 | Thread Size N/A 3/8-16 | Grip Range N/A .370 - .455 in | A ± .015 N/A 1.218 in | M Ref. N/A | Fastening N/A Uninstalled | Standard Material N/A 6053 Aluminum or 6061 Aluminum | Standard Finish N/A Anodized in accordance with MIL-A-8625, Type II, Class 1 plus lubricant | CAD                                                    
 N/A   | 
| AEA37K455 | Thread Size N/A 3/8-16 | Grip Range N/A .370 - .455 in | A ± .015 N/A | M Ref. N/A .630 in | Fastening N/A Installed | Standard Material N/A 6053 Aluminum or 6061 Aluminum | Standard Finish N/A Anodized in accordance with MIL-A-8625, Type II, Class 1 plus lubricant | CAD                                                    
 N/A   | 
| AENM37K455 | Thread Size N/A 3/8-16 | Grip Range N/A .370 - .455 in | A ± .015 N/A 1.218 in | M Ref. N/A | Fastening N/A Uninstalled | Standard Material N/A 300 Series Stainless Steel | Standard Finish N/A Passivated and/or Tested Per ASTM A380 | CAD                                                    
 N/A   | 
| AENM37K455 | Thread Size N/A 3/8-16 | Grip Range N/A .370 - .455 in | A ± .015 N/A | M Ref. N/A .630 in | Fastening N/A Installed | Standard Material N/A 300 Series Stainless Steel | Standard Finish N/A Passivated and/or Tested Per ASTM A380 | CAD                                                    
 N/A   | 
| AESS37K455 | Thread Size N/A 3/8-16 | Grip Range N/A .370 - .455 in | A ± .015 N/A 1.218 in | M Ref. N/A | Fastening N/A Uninstalled | Standard Material N/A 430 Series Stainless Steel | Standard Finish N/A Passivated and/or Tested Per ASTM A380 | CAD                                                    
 N/A   | 
| AESS37K455 | Thread Size N/A 3/8-16 | Grip Range N/A .370 - .455 in | A ± .015 N/A | M Ref. N/A .630 in | Fastening N/A Installed | Standard Material N/A 430 Series Stainless Steel | Standard Finish N/A Passivated and/or Tested Per ASTM A380 | CAD                                                    
 N/A   | 
| AEBR37K455 | Thread Size N/A 3/8-16 | Grip Range N/A .370 - .455 in | A ± .015 N/A 1.218 in | M Ref. N/A | Fastening N/A Uninstalled | Standard Material N/A Alloy No. 260 Brass | Standard Finish N/A None - bright as machined | CAD                                                    
 N/A   | 
| AEBR37K455 | Thread Size N/A 3/8-16 | Grip Range N/A .370 - .455 in | A ± .015 N/A | M Ref. N/A .630 in | Fastening N/A Installed | Standard Material N/A Alloy No. 260 Brass | Standard Finish N/A None - bright as machined | CAD                                                    
 N/A   | 
| AECH37K455 | Thread Size N/A 3/8-16 | Grip Range N/A .370 - .455 in | A ± .015 N/A 1.218 in | M Ref. N/A | Fastening N/A Uninstalled | Standard Material N/A 4037 Alloy Steel | Standard Finish N/A Cadmium Plate - .0003” minimum thickness per SAE AMS-QQ-P-416 Class 2, Type II | CAD                                                    
 N/A   | 
| AECH37K455 | Thread Size N/A 3/8-16 | Grip Range N/A .370 - .455 in | A ± .015 N/A | M Ref. N/A .630 in | Fastening N/A Installed | Standard Material N/A 4037 Alloy Steel | Standard Finish N/A Cadmium Plate - .0003” minimum thickness per SAE AMS-QQ-P-416 Class 2, Type II | CAD                                                    
 N/A   | 
| AES31K500 | Thread Size N/A 5/16-18 | Grip Range N/A .425 - .500 in | A ± .015 N/A 1.187 in | M Ref. N/A | Fastening N/A Uninstalled | Standard Material N/A Low Carbon Steel | Standard Finish N/A Cadmium Plate - .0003” minimum thickness per SAE AMS-QQ-P-416 Class 2, Type II | CAD                                                    
 N/A   | 
| AES31K500 | Thread Size N/A 5/16-18 | Grip Range N/A .425 - .500 in | A ± .015 N/A | M Ref. N/A .565 in | Fastening N/A Installed | Standard Material N/A Low Carbon Steel | Standard Finish N/A Cadmium Plate - .0003” minimum thickness per SAE AMS-QQ-P-416 Class 2, Type II | CAD                                                    
 N/A   | 
| AEA31K500 | Thread Size N/A 5/16-18 | Grip Range N/A .425 - .500 in | A ± .015 N/A 1.187 in | M Ref. N/A | Fastening N/A Uninstalled | Standard Material N/A 6053 Aluminum or 6061 Aluminum | Standard Finish N/A Anodized in accordance with MIL-A-8625, Type II, Class 1 plus lubricant | CAD                                                    
 N/A   | 
| AEA31K500 | Thread Size N/A 5/16-18 | Grip Range N/A .425 - .500 in | A ± .015 N/A | M Ref. N/A .565 in | Fastening N/A Installed | Standard Material N/A 6053 Aluminum or 6061 Aluminum | Standard Finish N/A Anodized in accordance with MIL-A-8625, Type II, Class 1 plus lubricant | CAD                                                    
 N/A   | 
| AENM31K500 | Thread Size N/A 5/16-18 | Grip Range N/A .425 - .500 in | A ± .015 N/A 1.187 in | M Ref. N/A | Fastening N/A Uninstalled | Standard Material N/A 300 Series Stainless Steel | Standard Finish N/A Passivated and/or Tested Per ASTM A380 | CAD                                                    
 N/A   | 
| AENM31K500 | Thread Size N/A 5/16-18 | Grip Range N/A .425 - .500 in | A ± .015 N/A | M Ref. N/A .565 in | Fastening N/A Installed | Standard Material N/A 300 Series Stainless Steel | Standard Finish N/A Passivated and/or Tested Per ASTM A380 | CAD                                                    
 N/A   | 
| AESS31K500 | Thread Size N/A 5/16-18 | Grip Range N/A .425 - .500 in | A ± .015 N/A 1.187 in | M Ref. N/A | Fastening N/A Uninstalled | Standard Material N/A 430 Series Stainless Steel | Standard Finish N/A Passivated and/or Tested Per ASTM A380 | CAD                                                    
 N/A   | 
| AESS31K500 | Thread Size N/A 5/16-18 | Grip Range N/A .425 - .500 in | A ± .015 N/A | M Ref. N/A .565 in | Fastening N/A Installed | Standard Material N/A 430 Series Stainless Steel | Standard Finish N/A Passivated and/or Tested Per ASTM A380 | CAD                                                    
 N/A   | 
| AEBR31K500 | Thread Size N/A 5/16-18 | Grip Range N/A .425 - .500 in | A ± .015 N/A 1.187 in | M Ref. N/A | Fastening N/A Uninstalled | Standard Material N/A Alloy No. 260 Brass | Standard Finish N/A None - bright as machined | CAD                                                    
 N/A   | 
| AEBR31K500 | Thread Size N/A 5/16-18 | Grip Range N/A .425 - .500 in | A ± .015 N/A | M Ref. N/A .565 in | Fastening N/A Installed | Standard Material N/A Alloy No. 260 Brass | Standard Finish N/A None - bright as machined | CAD                                                    
 N/A   | 
| AES37K540 | Thread Size N/A 3/8-16 | Grip Range N/A .455 - .540 in | A ± .015 N/A 1.312 in | M Ref. N/A | Fastening N/A Uninstalled | Standard Material N/A Low Carbon Steel | Standard Finish N/A Cadmium Plate - .0003” minimum thickness per SAE AMS-QQ-P-416 Class 2, Type II | CAD                                                    
 N/A   | 
| AES37K540 | Thread Size N/A 3/8-16 | Grip Range N/A .455 - .540 in | A ± .015 N/A | M Ref. N/A .635 in | Fastening N/A Installed | Standard Material N/A Low Carbon Steel | Standard Finish N/A Cadmium Plate - .0003” minimum thickness per SAE AMS-QQ-P-416 Class 2, Type II | CAD                                                    
 N/A   | 
| AEA37K540 | Thread Size N/A 3/8-16 | Grip Range N/A .455 - .540 in | A ± .015 N/A 1.312 in | M Ref. N/A | Fastening N/A Uninstalled | Standard Material N/A 6053 Aluminum or 6061 Aluminum | Standard Finish N/A Anodized in accordance with MIL-A-8625, Type II, Class 1 plus lubricant | CAD                                                    
 N/A   | 
| AEA37K540 | Thread Size N/A 3/8-16 | Grip Range N/A .455 - .540 in | A ± .015 N/A | M Ref. N/A .635 in | Fastening N/A Installed | Standard Material N/A 6053 Aluminum or 6061 Aluminum | Standard Finish N/A Anodized in accordance with MIL-A-8625, Type II, Class 1 plus lubricant | CAD                                                    
 N/A   | 
| AENM37K540 | Thread Size N/A 3/8-16 | Grip Range N/A .455 - .540 in | A ± .015 N/A 1.312 in | M Ref. N/A | Fastening N/A Uninstalled | Standard Material N/A 300 Series Stainless Steel | Standard Finish N/A Passivated and/or Tested Per ASTM A380 | CAD                                                    
 N/A   | 
 
		   
		  
 
                                            
 
                                                                