MIL-S-45387 Springs, Torsion Bar, SuspensionThis specification covers straight, solid, circular cross-section, torsion-bar springs.

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MIL-S-45387B(AT)

Table II. Classification of defects.

Categories Minor AQL 4.0 Percent Method of

Defective Inspection

200.	Length of teeth	………………	SIE
201.	Chamfer (both ends)	………………	SIE
202.	Overall length	………………	SIE
203.	Threads requirements	………………	Go thread plug
			Gage, not go
			thread plug gage
204.	Removed tooth	………………	Visual
	mark (both ends)
205.	Incomplete coverage	………………	Visual
206.	Printing incomplete	………………	Visual

207. Damaged ……………… Visual

* 4.3.3.3 Inspection equipment. The inspection equipment for various characteristics specified in 4.3.3.2 are referenced in the method of Inspection on the representative Supplementary Quality Assurance Provisions (SQAP's) developed for each of the torsion bars tabulated on K8668989 spring torsion bar suspension or other applicable drawings.

4.4 Inspection procedure.

4.4.1 Material check. To determine conformance to 3.3 and 3.3.1, prior to processing the torsion bar springs the material shall be checked for specified defects and lengths.

4.4.2 Chemical composition and hardenability check. Unless otherwise specified chemical analysis shall be performed to determine conformance to 3.3.2 and 3.3.3.

4.4.3 Forming check. To determine conformance to 3.5.1, the formed ends shall be checked for proper lengths, diameter, and radius. After the serrations have been completed a dimensional check shall be made of the serrations.

4.4.4 Heat treatment test. To determine conformance to 3.5.2 and 3.5.2.1, the torsion bar springs shall be checked for Rockwell C hardness and the procedure shall be observed for conformance.

4.4.5 Straightening operations check. To determine conformance to 3.5.3, the straightening operation shall be checked for proper temperature.

* 4.4.6 Surface indications and discontinuities check. To determine conformance to 3.5.4, the torsion bar springs shall be checked for discontinuities in accordance with Specification

MIL-M-11472, 100 percent. If springs are fabricated from non-magnetic material, they shall be inspected by the dye penetrant method of MIL-I-6866, or by an approved alternate method.