Not all fasteners are created equally; so we weed out the bad ones. Earnest Machine is an established leader in supplying quality fasteners. In 1972, we began investing in testing equipment and today we operate a highly sophisticated testing laboratory. The lab does more than just test product; it provides quality assurance for every application you have.

    

   

OUR TESTING LABORATORY PUTS FASTENERS THROUGH A BATTERY OF TESTS THAT INCLUDE:

Manufacturer’s Test ReportTest results reported by the manufacturer
of the product
Chemical & Physical Test ReportInternally Threaded Fasteners/Washers
Chemical & Physical Test Report

Externally Threaded Fasteners/Washers

Case DepthPer SAE J423
Chemical AnalysisAlloy Steel
Chemical AnalysisCarbon Steel - C, Mn, P, S, Si
Chemical AnalysisStainless Steel 300/400 Series
Contoureader TracingTracing with Autographic Printout
Contoureader TracingThread Tracing with Master Chart Overlay
Decarburization /
Carburization Report		Sample Sectioning, Mounting, Polishing,
& Etching. Per SAE J121, J121M, J419;
ASTM A574, F835, F835M
Examination for Laps on ThreadSection, Mount, & Polish
Hardness Core (Rockwell: HRC, HRB, 15N, 30N)Nuts/Bolts 1/4” through 1”
Hardness Core (Rockwell: HRC, HRB, 15N, 30N)Nuts/Bolts 1 1/8” through 2”
Hardness Core (Rockwell: HRC, HRB, 15N, 30N)Non - Fastener
Hardness Core (Rockwell: HRC, HRB, 15N, 30N)Nuts/Bolts 1/4” through 1”
Hardness Core (Rockwell: HRC, HRB, 15N, 30N)Nuts/Bolts 1 1/8” through 2”
Hardness Core (Rockwell: HRC, HRB, 15N, 30N)Non - Fastener
Magnetic Particle TestBolts per SAE J1061
Magnetic Particle TestBolts per SAE J123
Magnetic Particle TestBolts per ASTM F788
Magnetic Particle TestNuts per SAE J122A
Magnetic Particle TestNuts per ASTM F812
Plating Thickness MeasurementThickness Measured from 0
to 2 Mil (Zn Fe & Cd Fe)
Proof Load Test 400,000 lb. max capacity (Externally Threaded)Bolts 1/4” through 3/4”
Proof Load Test 400,000 lb. max capacity (Externally Threaded)Bolts 7/8” through 1 1/4”
Proof Load Test 400,000 lb. max capacity (Externally Threaded)Bolts 1 3/8” through 2”
Proof Load Test 400,000 lb. max capacity (Internally Threaded)Nuts 1/4” through 3/4”
Proof Load Test 400,000 lb. max capacity (Internally Threaded)Nuts 7/8” through 1 1/4
Proof Load Test 400,000 lb. max capacity (Internally Threaded)Nuts 1 3/8” through 2”
Salt Spray TestPer ASTM B117
Surface Discontinuity MeasureDepth & Width (Crack or Seam)
Surface Roughness TestPer ASTM B46.1
Tensile Test 400,000 lb.
max capacity (Wedge, Axial)		Bolts 1/4” through 3/4”
Tensile Test 400,000 lb.
max capacity (Wedge, Axial)		Bolts 7/8” through 1 1/4”
Tensile Test 400,000 lb.
max capacity (Wedge, Axial)		Bolts 1 3/8” through 2”
Tensile Test - Machined SpecimenJ429 / F606 / A370