A-A-52430 Pads, Cushioning: Personnel-Protection, Vehicular (Metric)This commercial item description (CID) covers the general requirements for pads, cushioning: personnel-protection, vehicular (metric). Pads, cushioning: personnel-protection, vehicular (metric) covered by this CID are intended for commercial/industrial applications.

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A-A-52430A

3.1.2 Types and Classes. CID dash number shall be as specified in table l.

TABLE I. CID Dash number relationship to type and class.

CID dash number	Type information	Previous class code	Class information
001	Type I - Facial contact	CS	Closed cell, expanded rubber.
002	Type l - Facial contact	VS	Cellular vinyl elastomer.
003	Type l - Facial contact	WF	Foam rubber.
004	Type ll - Head and body contact.	CS	Closed cell, expanded rubber.
005	Type ll - Head and body contact	VS	Cellular vinyl elastomer.
006	Type ll - Head and body contact	WF	Wool felt

3.1.3 Type I class CS pads. Base material shall be of closed-cell rubber conforming to grade 2A1 as specified in ASTM D1056.

3.1.4 Type I class VS pads. Base material shall be of cellular expanded polyvinyl chloride of density equivalent to grade 2A1 as specified in ASTM D1056.

3.1.5 Type I class FR pads. Base material shall be of foam rubber conforming to grade 1C1 as specified in ASTM D1056.

3.1.6 Type II class CS and VS pads. Base material shall be as specified in 3.1.3 and 3.1.4, respectively.

3.1.7 Type class WF pads. Base material shall be a firm pad mechanical-roll wool felt. The wool felt shall be mildew and moisture resistant in accordance with accepted commercial treatment procedures.

3.2 Design and construction. The cushioning pad shall be an assembly consisting of cushioning material which shall meet the requirements specified herein and shall have a smooth, tough surface coating. Metal inserts, when specified, shall be zinc and dichromate plated mild steel or alodine clad aluminum and shall be securely attached as shown in applicable drawings (see 7.5). Pads shall be designed for application by cementing to painted or unpainted surfaces, or in the case of metal backed pads, by welding, riveting, or bolting as specified in applicable drawings.

3.2.1 Welding, riveting, or bolting. Pads intended to be bolted, riveted, or welded in place shall include provisions for such attachments as shown in applicable drawings (see 7.5). Welding tabs shall extent 3/4 inch beyond pads as shown in applicable drawings. Welding tabs shall not be plated.

3.2.2 Type I pads. When specified in applicable drawing (see 7.5), reinforcement shall be firmly bonded to metal insert with Polychloroprene rubber base oil resistant type general purpose adhesive. Reinforcement shall consist of woven nylon or Dacron cloth netting and shall be securely cemented, as specified, over back of backing plate for 13 millimeters (mm) and up the edge of the pad for 13 mm. In no case shall reinforcement come to full height of pad. Surface coating of Polychloroprene not less than 0.5 mm thick shall smoothly cover entire assembly, except attaching lugs, as shown in applicable drawing (see 7.5).

3.2.3 Type II pads. Construction shall be as specified in 3.2.2 except that plain or flat knit cotton surgical stockinet or nylon or Dacron cloth netting shall be securely cemented, as specified, over back or backing plate for 13 mm (classes CS and VS). Polychloroprene coating shall be not less than 0.8 mm thick.