Print This Page
From the moment your order goes into production, our National Total Quality Assurance Program ensures you of the utmost quality and consistency.
At National Bolt & Nut Corporation, we offer complete Chemical, Physical and Letters of Compliance certification upon request. Our in-house Quality Control department is an integral part of the way we provide the service you expect, and includes the following:
- 500,000 lb. capacity tensile tester for destructive testing of up to 1.5" diameter fasteners
- Hardness and core testing and superficial surface hardness testing
- Camber machine for verifying straightness
- Complete dimensional inspection including over 230-setting plug gauges and 1100-thread ring gauges
- Precision-calibrated gauge blocks for setting calipers and micrometers
- Just in Time
- Kanban
- Zero Inventory
- Stocking Programs
- 24 Hour Emergency Turnaround
EMP LAB TESTING SERVICE
| Description | Part No. | |
|---|---|---|
| Manufacturer's Test Report | Test results reported by manufacturer of the product | 939911 |
| Chemical & Physical Test Report | Internally Threaded Fasteners/Washers | 939900 |
| Chemical & Physical Test Report | Externally Threaded Fasteners/Washers | 939902 |
| Case Depth | Per SAE J423 | 934800 |
| Chemical Analysis | Alloy Steel | 937923 |
| Chemical Analysis | Carbon Steel - C, Mn, P, S, Si | 937924 |
| Chemical Analysis | Stainless Steel 300/400 Series | 937925 |
| Contoureader Tracing | Tracing with Autographic Printout | 933111 |
| Contoureader Tracing | Thread Tracing with Master Chart Overlay | 933121 |
| Decarburization/Carburization Report | Sample Sectioning, Mounting, Polishing, & Etching. Per SAE J121, J121M, J419; ASTM A574, F835, F835M | 934901 |
| Examination for Laps on Thread | Section, Mount & Polish | 934904 |
| Hardness Core (Rockwell: HRC, HRB, 15N, 30N) |
Nuts/Bolts 1/4" through 1" | 937111 |
| Hardness Core (Rockwell: HRC, HRB, 15N, 30N) |
Nuts/Bolts 1 1/8" through 2" | 937112 |
| Hardness Core (Rockwell: HRC, HRB, 15N, 30N) |
Non-Fastener | 937113 |
| Hardness Surface (Rockwell: HRC, HRB, 15N, 30N) |
Nuts/Bolts 1/4" through 1" | 937121 |
| Hardness Surface (Rockwell: HRC, HRB, 15N, 30N) |
Nuts/Bolts 1 1/8" through 2" | 937122 |
| Hardness Surface (Rockwell: HRC, HRB, 15N, 30N) |
Non-Fastener | 937123 |
| Magnetic Particle Test | Bolts per SAE J1061 | 934111 |
| Magnetic Particle Test | Bolts per SAE J123 | 934131 |
| Magnetic Particle Test | Bolts per ASTM F788 | 934132 |
| Magnetic Particle Test | Nuts per SAE J122A | 934263 |
| Magnetic Particle Test | Nuts per ASTM F812 | 934264 |
| Plating Thickness Measurement | Thickness Measured from 0 to 2 Mil (Zn Fe & Cd Fe) | 936111 |
| Proof Load Test - 400,000 lb. max capacity (Externally Threaded) |
Bolts 1/4" through 3/4" | 932213 |
| Proof Load Test - 400,000 lb. max capacity (Externally Threaded) |
Bolts 7/8" through 1 1/4" | 932223 |
| Proof Load Test - 400,000 lb. max capacity (Externally Threaded) |
Bolts 1 3/8" through 2" | 932233 |
| Proof Load Test - 400,000 lb. max capacity (Externally Threaded) |
Nuts 1/4" through 3/4" | 932211 |
| Proof Load Test - 400,000 lb. max capacity (Externally Threaded) |
Nuts 7/8" through 1 1/4" | 932221 |
| Proof Load Test - 400,000 lb. max capacity (Externally Threaded) |
Nuts 1 3/8" through 2" | 932231 |
| Salt Spray Test | Per ASTM B117 | 935120 |
| Surface Discontinuity Measure | Depth & Width (Crack or Seam) | 934903 |
| Surface Roughness Test | Per ASTM B46.1 | 935700 |
| Tensile Test - 400,000 lb. max capacity (Wedge, Axial) |
Bolts 1/4" through 3/4" | 932011 |
| Tensile Test - 400,000 lb. max capacity (Wedge, Axial) |
Bolts 7/8" through 1 1/4" | 932021 |
| Tensile Test - 400,000 lb. max capacity (Wedge, Axial) |
Bolts 1 3/8" through 2" | 932031 |
| Tensile Test - Machined Specimen | J429 / F606 / A370 | 932411 |
