---
kind: "section"
citation: "14 C.F.R. § 25.607"
title: "14"
number: "25.607"
heading: "Fasteners."
url: "https://uscodex.org/cfr/14/25.607"
---

# §25.607. Fasteners.

- (a) Each removable bolt, screw, nut, pin, or other removable fastener must incorporate two separate locking devices if—
  - (1) Its loss could preclude continued flight and landing within the design limitations of the airplane using normal pilot skill and strength; or
  - (2) Its loss could result in reduction in pitch, yaw, or roll control capability or response below that required by Subpart B of this chapter.
- (b) The fasteners specified in [paragraph (a)](#a) of this section and their locking devices may not be adversely affected by the environmental conditions associated with the particular installation.
- (c) No self-locking nut may be used on any bolt subject to rotation in operation unless a nonfriction locking device is used in addition to the self-locking device.

## Notes

### Amendments

[Amdt. 25-23, 35 FR 5674, Apr. 8, 1970]

### Authority

Authority: 49 U.S.C. 106(f), 106(g), 40113, 44701, 44702 and 44704; Pub. L. 115-254, 132 Stat 3281 (49 U.S.C. 44903 note).

### Source

Source: Docket No. 5066, 29 FR 18291, Dec. 24, 1964, unless otherwise noted.

### Amendments

[Amdt. 25-23, 35 FR 5674, Apr. 8, 1970]