Small screw study: Interim report on fastener tensile strength and optimum thread depth
- Sandia National Labs., Albuquerque, NM (USA)
This report summarizes about 1260 tests performed on small threaded fasteners (equal to or less than 1/4 inch in diameter and designated as 1/4-20 UNC, {number sign}4-40 UNC, {number sign}2-56 UNC, and 1.0 UNM). Tests determined the tensile strengths of the screws, the lengths of engagement needed to develop the full tensile strengths when the screws were engaged in 6061-T6 Aluminum, Hiperco 50, and 303 Stainless Steel, and whether relationships existed between the tensile strengths and Knoop Micro-Hardness measurements taken on the threaded ends of the screws. 17 figs., 13 tabs.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5294827
- Report Number(s):
- SAND-89-1320; ON: DE90005001
- Country of Publication:
- United States
- Language:
- English
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