scope:

This specification covers seven (7) types of igniter pellets/granules for Use in rocket motors and fuzes. (see 6.8)

Igniter pellets/granules covered by this specification shall be of the following types and classes, as specified (see Tables III and IV):

Type I - Cylindrical Type II - B1 - Convex Type III - Modified Cylindrical Type IV - As per Drawing 9234458 or Drawing 9311312 (see 2.1) Type V - As per Drawing 657421 (See 2.1 and 6.8) Class 1. Crush Strength: Axial 18,500g, Radial 18,000g Class 2. Crush Strength: Axial 7,500g, Radial 7,500g Class 3. Crush Strength: Axial 3,000g, Radial 2,000g Type VI - As per Drawing SK445983 (See 2.1) Type VII - Oblate Spheroid Granules Class 1. 5% max. retained on USS Sieve No. 50 Class 2. 5% max. retained on USS Sieve No. 60 Class 3. 5% max. retained on USS Sieve No. 100

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, US Army Armament Research and Development Command, Attn. DRDAR-QA, Dover, New Jersey 07801 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

intended Use:

The Boron/Potassium Nitrate pellets or granules described in this specification are intended for use as a primary charge in rocket motor igniters and fuzes.