bolts, studs, or the like (making screw-thread B21K1/56; making U-bolts B21K1/74)

Full Title

Making machine elements > bolts, studs, or the like (making screw-thread B21K1/56; making U-bolts B21K1/74)

Child Classifications

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• B21K 1/46 with heads
• B21K 1/52 double-ended, e.g. with heads on both ends (forming heads B21K1/46)
• B21K 1/54 with grooves or notches