Information on the most widely used ASTM standards within the materials testing industry
ASTM D1761, ISO 27528, EN 1382, ASTM D1037, ASTM D143, EN 320
Our metal screw withdrawal test fixture, also widely named screw pull-out jig or fastener holding strength test fixture, is a dedicated matched auxiliary accessory compatible with all standard universal material testing machines (UTM).
Custom-engineered to apply pure axial tensile force onto screws embedded inside solid timber, wood composite panels and lignocellulose bio-based substitutes, this precision jig eliminates eccentric bending loads during testing to deliver highly accurate maximum screw withdrawal resistance (screw holding strength) test results for furniture, construction timber and engineered wood labs.
ASTM D1761 Standard Test Methods for Mechanical Fasteners in Wood and Wood-Based Materials
ISO 27528 Wood-based panels - Determination of resistance to axial withdrawal of screws
EN 320, EN 1382
General introduction
Screw Withdrawal Test Fixture | Screw Pull-Out Jig for Universal Testing Machine (UTM)
Our metal screw withdrawal test fixture, also widely named screw pull-out jig or fastener holding strength test fixture, is a dedicated matched auxiliary accessory compatible with all standard universal material testing machines (UTM).
Custom-engineered to apply pure axial tensile force onto screws embedded inside solid timber, wood composite panels and lignocellulose bio-based substitutes, this precision jig eliminates eccentric bending loads during testing to deliver highly accurate maximum screw withdrawal resistance (screw holding strength) test results for furniture, construction timber and engineered wood labs.
Full Global Standard Compliance for Wood Fastener Pull-Out Testing
This fastener test fixture fully meets international axial screw withdrawal test standards:
ASTM D1761 Standard Test Methods for Mechanical Fasteners in Wood and Wood-Based Materials
ISO 27528 Wood-based panels - Determination of resistance to axial withdrawal of screws
EN 320, EN 1382
Test Principle
The wood specimen is fully supported by the lower base plate. The upper chuck clamps the exposed screw shank. The UTM crosshead moves upward at constant speed to pull the screw vertically out from the wood substrate. The system records real-time load–displacement curve and ultimate withdrawal force (peak pull-out load) to calculate screw holding strength (N/mm or N/mm²).

Main test index: Ultimate withdrawal load (N), screw holding strength (N/mm), load-displacement curve, failure mode (thread pull-out, wood fiber tearing, screw thread fracture)
Engineering value: Provides quantitative data for wood material grade classification, furniture structure safety design, timber building joint load calculation, and product quality acceptance threshold setting.
Keywords: screw withdrawal test fixture, screw pull-out jig, fastener holding test fixture, UTM wood screw test accessory, axial tensile screw withdrawal test, screw holding strength measurement, wood composite fastener pull-out fixture, no eccentric bending load test jig, ASTM D1761 test fixture, ISO 27528 screw withdrawal jig, engineered wood panel fastener testing accessory.
Key Features
Lower Support Base Fixture
Thick high-strength steel channel / box frame with a central round slotted opening; the opening diameter is larger than screw head but smaller than the wood specimen surface.
Flat bearing surface to fully support the wood panel, preventing local compression damage during pulling.
Adjustable positioning blocks for centering specimens of different sizes (face withdrawal / edge withdrawal).
Upper Pulling Gripping Assembly
Interchangeable chuck (Jacob’s self-centering chuck) for clamping screw shank / screw tip; compatible with pan-head, countersunk, wafer-head, lag screws, wood self-tapping screws.
Adjustable pull rod with universal joint (swivel bearing) to automatically correct minor misalignment and guarantee 100% axial tension, eliminate side bending torque.
Replaceable pressure washers for large-diameter flange-head structural timber screws.
Mounting Adapters
Standard T-slot connector for fast installation on UTM upper crosshead and lower test bench, compatible with 5kN–300kN tensile testers.
Accessory Kit
Multiple size centering gaskets, thickness adjustment shims, specimen positioning rulers, anti-wear steel liners for frequent testing.
Solid timber: softwood/hardwood lumber, glued laminated timber (glulam), cross-laminated timber (CLT)
Wood-based panels: particleboard, MDF, HDF, OSB, hardboard, plywood
Lignocellulose composites: bamboo board, straw board, wood-plastic composite (WPC), fiber-reinforced bio-plastics
Similar substitute materials: gypsum fiber board, cement wood board, lightweight furniture composite panels
Industrial & Lab Usage Scenarios:
Wood panel factory incoming quality control (IQC) & finished product inspection
Furniture, cabinet, wooden door R&D material performance comparison
Structural timber construction laboratory, third-party material testing institute
Raw material formulation research (fiber ratio, resin content effect on screw holding power)
Fastener factory screw thread design optimization test
Building material certification & standard compliance verification
Face Screw Withdrawal Test: Screw penetrates perpendicular to the panel surface (most common for furniture, cabinet board inspection)
Edge Screw Withdrawal Test: Screw driven into panel edge (structural timber joint performance)
Lag Screw / Structural Timber Screw Pull-Out: Large-diameter construction fastener anchorage test for timber engineering
Screw head pull-through test (optional replaceable bottom plate accessory)
Comparative evaluation of predrilled vs non-predrilled screw installation
Full Standard Compliance Design
Modular replaceable components meet all global mainstream wood fastener test standards; one fixture realizes multi-standard switching without custom rework.
Zero Eccentric Axial Loading
Built-in floating universal joint automatically compensates specimen installation offset; avoids premature wood splitting caused by lateral shear force, ensures accurate peak load data.
High Versatility & Modularity
Interchangeable bottom plates (slotted for withdrawal, solid hole for head pull-through), multiple chucks and gaskets cover tiny furniture screws to large structural lag screws; supports both thin furniture panels and thick solid timber.
Clevis‑pin interface – mates with almost any UTM (¼″, ½″, M10 etc. adapters available); easy to swap between machines.
ASTM D1761 Standard Test Methods for Mechanical Fasteners in Wood and Wood-Based Materials
ISO 27528 Wood-based panels - Determination of resistance to axial withdrawal of screws
EN 320 Particleboards and fibreboards - Determination of resistance to axial withdrawal of screws
EN 1382 Timber Structures - Test methods - Withdrawal capacity of timber fasteners
GOST R 57176 Timber structures. Test methods for withdrawal capacity of timber fasteners
BS 6948 Methods of test for mechanically fastened joints in timber and wood-based materials
GB/T 17657: Test methods of evaluating the properties of wood-based panels (equivalent to ASTM D1037 domestic implementation standard)
Main specification:
| Fixture Material | 45# carbon steel / 40Cr alloy steel, black oxide anti-rust treatment; high rigidity, low deformation |
| Compatible Tester Load Range | 5kN ~ 300kN universal tensile testing machine |
| Clamping Screw Diameter Range | φ1.6mm ~ φ16mm (standard chuck); optional heavy-duty chuck up to φ24mm lag screw |
| Max Specimen Size | Face withdrawal: min 76×102mm; Edge withdrawal: min 76×152mm; adjustable for 10–50mm thick panels |
| Centering Deviation Control | ≤0.1mm, universal swivel joint eliminates eccentric load |
| Mounting Interface | Universal T-slot fixture adapter, fits most brand UTMs (Instron, Shimadzu, domestic electronic tensile testers) |
| Overall Fixture Weight | 12–28kg (depends on load grade) |
| Surface Hardness | HRC 28–32, wear-resistant for long-cycle repeated testing |
Standard
ASTM D1761 test methods provide a basic procedure for evaluating the withdrawal and lateral resistance of fasteners installed in wood and wood-based materials. The tests also provide a basis for determining comparable performance of different types and sizes of fasteners installed in wood and wood-based materials. Quantify the mechanical connection performance of nails, staples, screws, bolts, lag screws and timber connectors embedded in solid wood, plywood, OSB, fiberboard and other wood-based composites. Spikes are classified as nails within this standard.
ISO 27528 defined to measure the maximum axial pull-out force required to extract screws from wood composite panels, covering two core test modes: face screw withdrawal and edge screw withdrawal. It serves as a global unified test method for evaluating the screw holding capacity of fibreboard, particleboard, OSB, plywood and other engineered wood panels with thickness ≥ 15 mm.
ASTM D1037 - Standard Test Methods for Evaluating Properties of Wood-Base Fiber and Particle Panel Materials
ASTM D1037 test methods cover the determination of the properties of wood-base fiber and particle panel materials that are produced as mat-formed panels such a particleboard, medium density fiberboard, hardboard, and oriented strand board.
ASTM D1037 test methods cover small-specimen tests for wood-base fiber and particle panel materials that are made to provide: Data for comparing the mechanical and physical properties of various materials,
Data for determining the influence on the basic properties of such factors as raw material and processing variables, post-treatments of panels, and environmental influences, and
Data for manufacturing control, product research and development, and specification acceptance.
ASTM D143 – Standard Test Methods for Small Clear Specimens of Timber
ASTM D143 covers the determination of various strength and related properties of wood by testing small, clear specimens. These specimens are free of knots or other defects that might influence the test results. The standard includes a wide range of test methods for evaluating both mechanical and physical properties of wood.
EN 320 Particleboards and fibreboards — Determination of resistance to axial withdrawal of screws is the official European test standard we fully support with our custom-built axial screw withdrawal testing machine.
This European norm defines a standardized laboratory test procedure to measure axial screw withdrawal resistance, also referred to as axial pull-out force, needed to pull calibrated standard screws out of particleboard, medium-density fibreboard (MDF) and high-density fibreboard (HDF) panels. Our universal testing machine paired with dedicated EN 320 screw pull-out fixtures delivers precise, repeatable force measurement that fully meets all specimen setup, axial loading and data recording rules laid out in EN 320.
EN 1382 stipulated method to measure the maximum axial pull-out resistance of mechanical fasteners (nails, wood screws, staples) embedded in solid timber, glued laminated timber (glulam), LVL and CLT structural timber. It provides standardized raw data for structural timber engineering design and Eurocode compliance, focusing on solid structural timber rather than man-made wood composite panels (particleboard/MDF covered by EN 320 / ISO 27528).
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